EN    EN COMMISSION DELEGATED REGULATION (EU) No …/..  
of XXX  
supplementing Directive 2010/30/EU of the European Parliament and of the Council 
with regard to the energy labelling of water heaters, hot water storage tanks and 
packages of water heater and solar device  
(Text with EEA relevance)  
THE EUROPEAN COMMISSION,  
Having regard to the Treaty on the Functioning of the European Union,  
Having regard to Directive 2010/30/EU of the European Parliament and of the Council of 19 
May 2010 on the indication by labelling and standard product information of the consumption 
of energy and other resources by energy -related products1, and in particular Article 1 0 thereof,  
Whereas:  
(1) Directive 2010/30/EU requires the Commission to adopt delegated acts as regards the 
labelling of energ y-related products that have a  significant potential for energy 
savings but exhibit  a wide disparity in performance levels with equivalent 
functionality.  
(2) The energy consumed by water heaters and hot water storage tanks accounts for a 
significant share of t he total energy demand in the Union, and water heaters and hot 
water storage tanks with equivalent functionality exhibit  a wide disparity in term s of 
water heating energy efficiency  and standing loss. The scope for reducing the ir 
energy consumption is sign ificant  and  includ es combining water  heaters with 
appropriate solar device s. Water heaters , hot water storage tanks and package s of 
water heaters  and  solar device s should therefore be covered by energy labelling  
requirements . 
(3) Harmonised provisions on indic ating the energy efficiency of water heaters and hot 
water storage tanks by labelling and standard product information should be laid 
down  to provide incentives for manufacturers to improve the energy efficiency of 
these products , to encourage end -users to  purchase energy -efficient products  and to 
contribute to the functioning of the internal market.  
(4) As regards  significant energy and cost savings for each type of water heater and for 
hot water storage tanks , this Regulation should introduce a new single lab elling scale  
from A to G for conventional  water heaters , solar water heaters and heat pump water 
                                                
1 OJ L 153, 18.6.2010, p. 1.   
EN    EN heaters and for hot water storage tanks. A dynamic class A+ should be added to the 
classification after two years to accelerate the market penetration of the most 
efficient water heaters and hot water storage tanks . 
(5) This Regulation should ensure that consumers get more accurate comparative 
information about the performance of solar water heaters and heat pump water 
heaters in three European climate zones.  
(6) The so und power level of a water heater could be an important consideration  for end -
users. Information on sound power levels should be included on the labels of water 
heaters , to enable them to make an informed decision . 
(7) The combined effect of the provisions set  out in this Regulation and Commission 
Regulation (EU) No …/… of … implementing Directive 2009/125/EC of the 
European Parliament and of the Council with regard to ecodesign requirements for 
water heaters and hot water storage tanks  [Number of the Regulatio n and OJ 
reference in footnote to be inserted before publication in the OJ]  is expected to result 
in estimated annual energy savings of around  450 PJ (11 Mtoe ), corresponding to 
about 26 Mt CO 2 emissions by 2020, compared to what would happen  if no measure s 
were  taken.  
(8) The information provided on the labels should be obtained through reliable, accurate 
and reproducible measurement and calculation procedures that take into account 
recognised state -of-the-art measurement and calculation methods including, whe re 
available, harmonised standards adopted by the European standardisation bodies  
under a request from the Commission, in accordance with the procedures laid down 
in the  Directive 98/34/EC of the European Parliament and of the Council of 22 June 
1998 layin g down a procedure for the provision of information in the field of 
technical standards and regulations and of rules on Information Society services2, for 
the purpose of establishing ecodesign requirements . 
(9) This Regulation should specify a uniform design a nd content of product labels for 
water heaters and hot water storage tanks.  
(10) In addition, this Regulation should specify requirements for the product fiche and 
technical documentation for water heaters and hot water storage tanks.  
(11) Moreover, this Regulation should specify requirements for the information to be 
provided for any form of distance selling  of water heaters and hot water storage tanks  
and in any  advertisements and technical promotional material  for such products . 
(12) In addition to the product labels a nd fiches for water heaters and hot water storage 
tanks laid down in this Regulation, a package label  and fiche based on product fiches 
from suppliers should ensure the wide availability of and easy access  to information 
on the energy performance of water heaters in combination with solar devices . The 
most efficient class A+++ may be reached by such a package  from the beginning . 
(13) It is appropriate to provide for a review of the provisions of this Regulation taking 
into account technological progress , 
                                                
2 OJ L 204, 21.7.1998, p. 37.   
EN    EN HAS ADO PTED THIS REGULATION:  
Article 1  
Subject matter  and scope  
1. This Regulation establishes requirements for the labelling of , and the provision of 
supplementary product information for, water heaters with a rated heat output  400 
kW, hot water storage tanks  with a storage volume  2 000 litres  and package s of 
water heater   400 kW  and solar device . 
2. This Regulation shall not apply to:  
(a) water heat ers specifically designed for using predominantly biomass fuels;  
(b) water heat ers using solid fuels;  
(c) water heat ers within t he scope of Directive 2010/75/EU of the European 
Parliament and of the Council3; 
(d) combination heaters  as defined in Article 2 of Commission Delegated 
Regulation (EU) No …/…. [Number of the heater energy labelling Regulation 
and OJ reference in footnote to b e inserted before publication in the OJ ]; 
(e) water heaters which do not meet at least the load profile with the smallest 
reference energy, as specified  in Annex VII , Table 4 ; 
(f) water heaters designed for making hot drinks and/or food only . 
Article 2  
Definitions  
In addition to the definitions set out in Article 2 of Directive 2010/30/EC, the following 
definitions shall apply:  
(1) ‘water heater ’ means a device that 
(a) is connected to an external supply of drinking or sanitary water;  
(b) generates and transfers heat to delive r drinking or sanitary hot water at given  
temperature levels, quantities and flow rates during given  intervals;  
(c) is equipped with one or more heat generators;  and 
(d) may be equipped with  one or more hot water storage tanks ; 
(2) ‘heat generator ’ means the part of a  water heater that generates the heat using one or 
more of the following processes:  
                                                
3 OJ L 334, 17.12.2010, p. 17.   
EN    EN (a) combustion of fossil fuels and/or biomass fuels ; 
(b) use of the Joule effect in electric resistance heating elements;  
(c) capture of ambient heat from an air source , water source  or ground source , 
and/or waste heat;  
(3) ‘rated heat output’ means the declared heat output of the water heater when 
providing water heating at standard rating conditions, expressed in kW;  
(4) ‘storage volume ’ (V) means the rated volume of a hot water storage tank , expressed 
in litres;  
(5) ‘standard rating conditions’ means the operating conditions of water heaters for 
establishing the rated heat output, water heating energy efficiency and sound power 
level, and of hot water storage tank s for establishing the standing l oss; 
(6) ‘biomass ’ means the biodegradable fraction of products, waste and residues from 
biological origin from agriculture (including vegetal and animal substances), forestry 
and related industries including fisheries and aquaculture , as well as the 
biodegrad able fraction of industrial and municipal waste;  
(7) ‘biomass fuel’ means a gaseous or liquid fuel produced from biomass;  
(8) ‘fossil fuel’ means a gaseous  or liquid fuel of fossil origin;  
(9) ‘hot water storage tank ’ means a vessel for storing hot water  for water and /or space 
heating purposes , including any additives ; a hot water storage tank may be  equipped 
with a means for indirect heating of the water content by an external heat source  or 
by district heating , but is not equipped with a ny heat generator except possi bly one or 
more  back -up immersion heat ers; a solar hot water storage tank is a hot water storage 
tank;  
(10) ‘district heating’ means the distribution of thermal energy in the form of steam or hot 
water, from a central source of production through a network to m ultiple buildings or 
sites, for the use of space and/or water heating;  
(11) ‘back -up immersion heater’ means a Joule effect electric resistance heater that is part 
of a hot water storage tank  and generates heat only when the external heat source is 
disrupted  (including during maintenance periods ) or out of order, or that is part of a 
solar hot water storage tank , is located in the middle of the storage volume  or above, 
and provid es heat when the solar heat source is not sufficient to satisfy required 
comfort lev els; 
(12) ‘solar  device ’ means a solar -only system, a solar  collector, a solar hot water storage 
tank or a pump in the collector loop , all placed on the market separately ; 
(13) ‘solar -only system ’ means a device that is equipped with  one or more solar collector s 
and solar hot water storage tank s and possibly  pump s in the collector loop  and other 
parts; a solar -only system  is placed on the market as one unit  and is not equipped 
with any heat generator  except possibly one or more  back -up immersion heaters ;  
EN    EN (14) ‘package  of water heater  and solar device ’ means a package offered to the end -user 
containing  one or more water heater s and  one or more  solar device s, all placed on the 
market separately;  
(15) ‘water heating energy efficiency ’ (wh) means the ratio between the useful energy 
provided by a water heater  or a package of water heater  and solar device  and the 
energy required for its generation, expressed in % ; 
(16) ‘sound power level’ ( LWA) means the A -weighted sound power level , indoors an d/or 
outdoors, expressed in dB;  
(17) ‘standing loss ’ (S) means the heating power dissipated from a hot water storage tank  
at given  water and ambient temperatures, expressed in W ; 
(18) ‘heat pump water heater’ means a water heater that uses ambient heat from an air 
source , water source or ground source, and/or waste heat for heat generation . 
For Annexes  II to IX, additional definitions are set out in Annex I.  
Article 3  
Responsibilities of suppliers  and timetable  
1. From [date to be inserted: two year s after this Regulati on has entered into force]  
suppliers placing water heaters on the market and/or putting them into service  shall 
ensure that:  
(a) a printed label complying with the format and content of information set out in 
point 1.1 of Annex III is provided for each water h eater conforming to the  
water heating energy efficiency  classes set out in point 1 of Annex II , whereby:  
for heat pump water  heaters , the printed label is provided at least in the 
packaging of the indoor unit ; for water heaters  intended for use in packages  of 
water heater and solar device , a second  label complying with the format and 
content of information set out in point 3 of Annex III  is provided for each 
water heater ; 
(b) a product fiche, as set out in point 1 of Annex IV , is provided for each water 
heater , whereby:  for heat pump water heaters , the product fiche  is provided at 
least for the indoor unit ; for water heaters intended for use in packages of water 
heater and solar device , a second fiche , as set out in point 4 of Annex IV , is 
provided ; 
(c) the technica l documentation, as set out in point 1 of Annex V , is provided  on 
request to the authorities of the Member States and to the Commission;  
(d) any advertisement that concerns  a specific water heater model and contains 
energy -related or price information includes  a reference to the water heating 
energy efficiency  class under average climate conditions  for that model ; 
(e) any technical promotional material that concern s a specific water heater model  
and describes its specific technical parameters includes a reference t o the water  
EN    EN heating energy efficiency  class under average climate conditions for that 
model;  
From [date to be inserted: four years after this Regulation has entered  into force]  a 
printed label complying with the format and content of information set out in  point 
1.2 of Annex III  shall be  provided for each water heater conforming to the  water 
heating energy efficiency  classes set out in point 1 of Annex II , whereby:  for heat 
pump water heaters, the printed label shall be provided at least in the packaging of  
the indoor unit . 
2. From [date to be inserted: two years after this Regulation has entered into force] 
suppliers placing hot water storage tanks  on the market and/or putting them into 
service  shall ensure that:  
(a) a printed label complying with the format and c ontent of information set out in 
point 2.1 of Annex III is provided for each hot water storage tank  conforming 
to the  energy efficiency  classes set out in point 2 of Annex II ; 
(b) a product fiche, as set out in point 2 of Annex IV , is provided ; 
(c) the technical d ocumentation, as set out in point 2 of Annex V , is provided  on 
request to the authorities of the Member States and to the Commission;  
(d) any advertisement that concerns  a specific hot water storage tank  model and 
contains energy -related or price information includes a reference to the energy 
efficiency class  for that model ; 
(e) any technical promotional material that concern s a specific hot water storage 
tank model  and describes its specific technical parameters includes a reference 
to the energy efficiency class for that model ; 
From [date to be inserted: four years after this Regulation has entered  into force]  a 
printed label complying with the format and content of information as set out in point 
2.2 of Annex III shall be  provided for each hot water storage tank  conforming to the  
energy efficiency  classes set out in point 2 of Annex II . 
3. From [date to be inserted: two year s after this Regulation has entered into force]  
suppliers placing solar device s on the market and/or putting them into service  shall 
ensure that:  
(a) a product fiche, as set out in point 3 of Annex IV , is provided ; 
(b) the technical documentation , as set out in point 3 of Annex V , is provided  on 
request to the authorities of the Member States  and to the Commission . 
Article 4  
Responsibilities of dealers  
1. Dealers of water heaters shall ensure that:   
EN    EN (a) each water heater, at the point of sale, bears the label provided by suppliers in 
accordance with Article 3(1) , as set out in point 1 of Annex III,  on the outside 
of the front of the appliance , in such a way as to b e clearly visible;  
(b) water heaters offered for sale, hire or hire -purchase, where the end -user cannot 
be expected to see the water heater displayed, are marketed with the 
information provided by the suppliers in accordance with point 1 of Annex VI ; 
(c) any adver tisement that concerns  a specific water heater model and contains 
energy -related or price information  includes a reference to the water heating 
energy efficiency  class under average climate conditions  for that model ; 
(d) any technical promotional material that concern s a specific water heater model  
and describes its specific technical parameters includes a reference to the water 
heating energy efficiency  class under average climate conditions for that 
model . 
2. Dealers of hot water storage tank s shall ensure that:  
(a) each hot water storage tank , at the point of sale, bears the label provided by 
suppliers in accordance with Article 3( 2), as set out in point 2 of Annex III,  on 
the outside of the front of the appliance , in such a way as to be clearly visible;  
(b) hot water s torage tank s offered for sale, hire or hire -purchase, where the end -
user cannot be expected to see the hot water storage tank  displayed, are 
marketed with the information provided by the suppliers in accordance with 
point 2 of Annex VI ; 
(c) any advertisement that concerns  a specific hot water storage tank  model and 
contains energy -related or price information  includes a reference to the energy 
efficiency class  for that model ; 
(d) any technical promotional material that concern s a specific hot water storage 
tank mod el and describes its specific technical parameters includes a reference 
to the energy efficiency class for that model . 
3. Dealers of package s of water heater  and solar device  shall ensure , based on the label 
and fiches provided by suppliers in accordance with  Article 3(1)  and 3(3),  that any 
offer for a specific  package  includes the water heating energy efficiency  and the 
water heating energy efficiency  class for that package  under average, colder or 
warmer climate conditions, as applicable, by displaying  with the package the label 
set out in point 3 of Annex III  and providing  the fiche  set out in point 4 of Annex IV , 
duly filled in according to the characteristics of that package . 
Article 5  
Measurement and calculation methods  
The information to be provided pursuant to Articles 3 and 4 shall be obtained by reliable, 
accurate and reproducible measurement and calculation methods  which take into account the 
recognised state -of-the-art measurement and calculation methods, as set out in Annex VII  and 
Annex VIII .  
EN    EN Artic le 6 
Verification procedure for market surveillance purposes  
Member States shall apply the procedure set out  in Annex IX  when assess ing the conformity 
of the declared water heating energy efficiency  class , water heating energy efficiency , annual 
energy con sumption and sound power level  of water heaters and the declared energy 
efficiency class and standing loss of hot water storage tank s. 
Article 7  
Review 
The Commission shall review this Regulation in the light of technological progress no later 
than five ye ars after its entry into force.  The review shall in particular assess any significant 
changes in the market shares of various types of appliances and the appropriateness of the 
package fiche and label set out in point 3 of Annex III  and point 4 of Annex IV . 
Article 8 
Entry into force  and application  
This Regulation shall enter into force on the twentieth day following that of its publication in 
the Official Journal of the European Union . 
This Regulation shall be binding in its entirety and directly applicab le in all Member States.  
Done at Brussels,  
 For the Commission  
 The President  
 José Manuel BARROSO   
EN 9   EN ANNEX I  
Definitions applicable for Annexes II to IX 
For Annexes II to IX, the following definitions shall apply:  
(1) ‘conventional water heater’ means a water heater that generates heat using the 
combustion of fossil and/or biomass fuels and/or the Joule effect in electric resistance 
heating elements ; 
(2) ‘solar water heater ’ means a water heater equipped with one or more solar collectors, 
solar hot water storage ta nks, heat generators  and possibly  pumps in the collector loop 
and other parts , a solar water heater is placed on the market as one unit ; 
(3) ‘load profile ’ means a given  sequence of water draw -offs, as specified in Annex VII , 
Table 4 ; 
(4) ‘water draw -off’ means a given  combination of useful water flow rate, useful water 
temperature, useful energy content and peak temperature, as specified in Annex VII , 
Table 4 ; 
(5) ‘useful water flow rate ’ (f) means  the minimum flow rate , expressed  in litres per 
minute , for which hot w ater is contributing to the reference energy , as specified in 
Annex VII , Table 4 ; 
(6) ‘useful water temperature ’ (Tm) means the water temperature , expressed in degrees 
Celsius, at which hot water starts  contributing to the reference energy , as specified in 
Annex VII , Table 4 ; 
(7) ‘useful energy content ’ (Qtap) means the energy content of hot water , expressed in 
kWh,  provided at a temperature equal to, or above, the useful water temperature, and 
at water flow rates equal to, or above, the useful water flow rate, as specified in 
Annex VII , Table 4 ; 
(8) ‘energy content of hot water ’ means the product of the specific heat capacity of water, 
the average temperature difference between the cold water input and hot water output, 
and the total mass of the hot water delivered;  
(9) ‘peak temperature ’ (Tp) means the minimum water temperature , expressed in degrees 
Celsius , to be achieved during water draw -off, as specified in Annex VII , Table 4 ; 
(10) ‘reference energy ’ (Qref) means the sum of the useful energy content of water draw -
offs, expr essed in kWh,  in a particular  load profile, as specified in Annex VII , Table 
4; 
(11) ‘maximum load profile ’ means the load profile with the greatest  reference energy that 
a water heater is able to provide while fulfilling the temperature and flow rate 
condition s of that load profile;  
(12) ‘declared load profile ’ means the load profile applied when determining water heating 
energy efficiency ;  
EN 10   EN (13) ‘conversion coefficient’ ( CC) means a coefficient reflecting the estimated 40  % 
average EU generation efficiency  referred to  in Directive 2006/32/EC of the 
European Parliament and of the Council4; the value of the conversion coefficient is 
CC = 2,5;  
(14) ‘daily electricity consumption ’ (Qelec) means the  consumption of electricity over 24 
consecutive hours under the declared  load profil e and under given  climate  conditions, 
expressed in kWh  in terms of final energy ; 
(15) ‘daily fuel consumption ’ (Qfuel) means the consumption of fuels over 24 consecutive 
hours under the declared  load profile and under given  climate conditions, expressed 
in kWh  in terms of  GCV , and for the purposes of point 4 in Annex VIII expressed  in 
GJ in terms of GCV ; 
(16) ‘gross calorific value ’ (GCV ) means the total amount of heat released by a unit 
quantity of fuel when it is burned completely with oxygen and when the products of 
combustion are returned to ambient temperature; this quantity includes the 
condensation heat of any water vapour contained in the fuel and of the water vapour 
formed by the combustion of any hydrogen contained in the fuel;  
(17) ‘smart control ’ means a device  that automatically adapts the water heating process to 
individual usage conditions with the aim of reduc ing energy consumption;  
(18) ‘smart control compliance ’ (smart ) means the measure of whether  a water heater 
equipped with smart controls fulfils  the criteri on set out in point 5 of Annex VIII;  
(19) ‘smart control factor ’ (SCF) means the water heating energy efficiency  gain due to 
smart control under the conditions set out in point 3 of Annex VII ; 
(20) ‘weekly electricity consumption with smart controls ’ (Qelec,week,sma rt) means the 
weekly electricity consumption of a water heater with the smart control function 
enabled, expressed in kWh  in terms of final energy ; 
(21) ‘weekly fuel consumption with smart controls ’ (Qfuel,week,smart ) means the weekly fuel 
consumption of a water  heater with the smart control function enabled, expressed in 
kWh in terms of  GCV ; 
(22) ‘weekly electricity consumption without smart controls ’ (Qelec,week ) means the weekly 
electricity consumption of a water heater with the smart control function disabled, 
expressed in kWh  in terms of final energy ; 
(23) ‘weekly fuel consumption without smart controls ’ (Qfuel,week ) means the weekly fuel 
consumption of a water heater with the smart control function disabled, expressed in 
kWh in terms of  GCV ; 
(24) ‘annual electricity consum ption ’ (AEC ) means the annual electricity consumption of a 
water heater under the declared load profile and under given  climate conditions, 
expressed in kWh  in terms of final energy ; 
                                                
4 OJ L 114, 27 .4.2006, p. 64 .  
EN 11   EN (25) ‘annual fuel consumption ’ (AFC ) means the annual fossil and/or biomass fuel 
consumption of a water heater under the declared  load profile and under given  
climate conditions, expressed in GJ in terms of  GCV ; 
(26) ‘ambient correction term’ ( Qcor) means a term which takes into account the fact that 
the place where the water heater is i nstalled is not an isothermal place, expressed in 
kWh;  
(27) ‘standby heat loss’ ( Pstby) means the heat loss of a heat pump water heater in 
operating modes without heat demand, expressed in kW;  
(28) ‘average climate conditions’, ‘colder climate conditions’ and ‘warme r climate 
conditions’ mean the temperature s and global solar irradiance conditions 
characteristic for the cities of Strasbourg, Helsinki and Athens, respectively ; 
(29) ‘annual energy consumption ’ (Qtota) means the annual energy consumption of a solar 
water heat er, expressed in kWh in terms of primary energy and/or kWh in terms of 
GCV ; 
(30) ‘annual non -solar  heat contribution ’ (Q nonsol), means the annual contribution of 
electricity  (expressed in kWh in terms of primary energy ) and/or fuels  (expressed in 
kWh in terms o f GCV ) to the useful heat output of a solar water heater or a package 
of water heater and solar device , taking into account the annual amount of heat 
captured by the solar collector and the heat losses of the solar hot water storage tank ; 
(31) ‘solar collector’  means a device designed to absorb global solar irradiance  and to 
transfer the heat energy so produced to a fluid passing through  it; it is characterised 
by the collector aperture area, the zero -load efficiency, the first order coefficient, the 
second orde r coefficient and the incidence angle modifier;  
(32) ‘global solar irradiance ’ means the rate of total incoming solar energy, both direct and 
diffuse, on a collector plane with an inclination of 45 degrees and southward 
orientation at the Earth ’s surface , expre ssed in W/m² ; 
(33) ‘collector aperture area ’ (Asol) means the maximum projected area through which 
unconcentrated solar radiation enters the collector, expressed in m²; 
(34) ‘zero-load efficiency ’ (0) means the efficiency of the solar collector, when the solar 
collector mean fluid temperature is equal to the ambient temperature ; 
(35) ‘first order coefficient ’ (a1) means the heat loss coefficient  of a solar collector , 
expressed in W/(m ² K); 
(36) ‘second order coefficient ’ (a2) means the coefficient measuring the temperature 
dependence of the first order coefficient, expressed in W/(m ² K²); 
(37) ‘incidence angle modifier’ ( IAM) means the ratio of the useful heat output of the solar 
collector at a given  incidence angl e and its useful heat output at an incidence angle of 
90 degrees;  
(38) ‘incidence angle’  means  the angle between the direction to the sun and the direction 
perpendicular to the solar collector aperture;   
EN 12   EN (39) ‘heat generator water heating energy efficiency ’ (wh,nonsol) means the water heating 
energy efficiency  of a heat generator which is  part of a solar water heater, expressed 
in %, established under average climate conditions and without using solar heat input;  
(40) ‘auxiliary electricity consumption’ ( Qaux), for the purpose of Figure 1 referred to as 
‘auxiliary electricity’, means the annual electricity consumption of a solar water 
heater or a solar -only system that is due to the pump power consumption and the 
standby power consumption, expressed in kWh in terms  of final energy;  
(41) ‘pump power consumption ’ (solpump ) means the rated electrical power consumption 
of the pump in the collector loop of a solar water heater or solar -only system, 
expressed in W;  
(42) ‘standby power consumption ’ (solstandby ) means the rated elect rical power 
consumption of a solar water heater or solar -only system when the pump and the heat  
generator  are inactive, expressed in W;  
(43) ‘model identifier ’ means the code, usually alphanumeric, which distinguishes a 
specific water heater, hot water storage tank or solar device  model from other models 
with the same trade mark or supplier’s name .  
EN 13   EN ANNEX II  
Energy efficiency classes  
1. Water heating energy efficiency  classes of water heaters  
The water heating energy efficiency  class of a water heater shall be dete rmined on the basis of 
its water heating energy efficiency  as set out in Table 1 . 
The water heating energy efficiency  of a water heater shall be calculated in accordance with 
point 3 of Annex VIII , for solar water heaters and heat pump water heaters under average 
climate conditions . 
2. Energy efficiency classes of hot water storage tank s 
The energy efficiency class of a hot water storage tank  shall be determined on the basis of its 
standing loss as set out in Table 2 . 
Table 2 : Energy efficiency classes of hot water storage tank s 
Energy efficiency class  Standing loss S in Watts, with storage volume V in litres  
A+ S < 5,5 + 3,16  · V0,4 
A 5,5 + 3,16  · V0,4  S < 8,5 + 4,25 · V0,4 
B 8,5 + 4,25  · V0,4  S < 12 + 5,93  · V0,4 
C 12 + 5,93  · V0,4  S < 16,66 + 8,33  · V0,4 
D 16,66 + 8,33  · V0,4  S < 21 + 10,33  · V0,4 
E 21 + 10,33  · V0,4  S < 26 + 13,66  · V0,4 
F 26 + 13,66  · V0,4  S < 31 + 16,66  · V0,4 
G S > 31 + 16,66  · V0,4  
EN 14   EN Table 1 : Water heating energy efficiency  classes of water heaters, categorised  by dec lared load profiles, wh in %  
 3XS XXS  XS S M L XL XXL  3XL  4XL  
A+++ wh  62 wh  62 wh  69 wh  90 wh  163  wh  188  wh  200  wh  213  wh  225  wh  238  
A++ 53  wh < 62  53  wh < 62  61  wh < 69  72  wh < 90  130  wh < 163  150  wh < 18 8 160  wh < 200  170  wh < 213  180  wh < 225  190  wh < 238  
A+ 44  wh < 53  44  wh < 53  53  wh < 61  55  wh < 72  100  wh <130  115  wh < 150  123  wh < 160  131  wh < 170  138  wh < 180  146  wh < 190  
A 35  wh < 44  35  wh < 44  38  wh < 53  38  wh < 55  65  wh < 100  75  wh < 115  80  wh < 123  85  wh < 131  90  wh < 138  95  wh < 146  
B 32  wh < 35  32  wh < 35  35  wh < 38  35  wh < 38  45  wh < 65  50  wh < 75  55  wh < 80  60  wh < 85  64  wh < 90  64  wh < 95  
C 29  wh < 32  29  wh < 32  32  wh < 35  32  wh < 35  36  wh < 45  37  wh < 50  38  wh < 55  40  wh < 60  40  wh < 64  40  wh < 64  
D 26  wh < 29  26  wh < 29  29  wh < 32  29  wh < 32  33  wh < 36  34  wh < 37  35  wh < 38  36  wh < 40 36  wh < 40  36  wh < 40  
E 22  wh < 26  23  wh < 26  26  wh < 29  26  wh < 29  30  wh < 33  30  wh < 34  30  wh < 35  32  wh < 36  32  wh < 36  32  wh < 36  
F 19  wh < 22  20  wh < 23  23  wh < 26  23  wh < 26  27  wh < 30  27  wh < 30 27  wh < 30  28  wh < 32  28  wh < 32  28  wh < 32  
G wh < 19  wh < 20  wh < 23  wh < 23  wh < 27 wh < 27 wh < 27 wh < 28 wh < 28 wh < 28 
  
EN 15   EN ANNEX II I 
The label s 
1. Water heaters  
1.1. Label 1  
1.1.1.  Conventional water heaters  in water heating energy effic iency  classes A to G  
  
EN 16   EN (a) The following information shall be included in the label:  
I. supplier ’s name or trade mark;  
II. supplier ’s model identifier;  
III. the water heating function , displayed  as a pictogram  of the declared load 
profile  in accordance with Table 3  of this Annex ; 
IV. the water heating energy efficiency  class, determined in accordance with 
point 1 of Annex II ; the head of the arrow containing the water heating 
energy efficiency  class of the water heater shall be placed at the same 
height as the head of the relevant energy efficiency class;  
V. the annual electricity consumption in kWh  in terms of final energy  and/or 
the annual fuel consumption  in GJ  in terms of  GCV , rounded to the 
nearest integer and calculated in accordance with point 4 of Annex VIII;  
VI. the sound power level LWA, indoors , in dB, rounded to the nearest integer;  
VII. for conventional water heaters  able to work only during off -peak hours,  
the pictogram referred to  in point 4(d)(10) of this Annex may be added.  
(b)  The design aspects of  the label for conventional water heaters shall be in 
accordance with point 4  of this Annex .  
EN 17   EN 1.1.2.  Solar water heaters in water heating energy efficiency  classes A to G  
 
(a) The following information shall be included in the label:  
I. supplier ’s name or trade mark ; 
II. supplier ’s model identifier;   
EN 18   EN III. the water heating function, displayed as a pictogram of the declared load 
profile in accordance with Table 3  of this Annex;  
IV. the water heating energy efficiency  class under average climate 
conditions, determined i n accordance with point 1 of Annex II ; the head 
of the arrow containing the water heating energy efficiency  class of the 
water heater shall be placed at the same height as the head of the relevant 
energy efficiency class;  
V. the annual electricity consumpt ion in kWh  in terms of  final energy  or the 
annual fuel consumption in GJ  in terms of  GCV , under average , colder 
and warmer climate conditions, rounded to the nearest integer and 
calculated in accordance with point 4 of Annex VIII;  
VI. European solar map display ing three indicative global solar irradiance 
zones;  
VII. the sound power level  LWA, indoors , in dB, rounded to the nearest integer . 
(b) The design aspects of the label for solar  water heaters shall be in accordance 
with point 5  of this Annex .  
EN 19   EN 1.1.3.  Heat pump  water heaters  in water heating energy efficiency  classes A to  G 
 
(a) The following information shall be included in the label:  
I. supplier ’s name or trade mark;  
II. supplier ’s model identifier;   
EN 20   EN III. the water heating function, displayed as a pictogram of the d eclared load 
profile in accordance with Table 3  of this Annex;  
IV. the water heating energy efficiency  class under average climate 
conditions, determined in accordance with point 1 of Annex II ; the head 
of the arrow containing the water heating energy effi ciency  class of the 
water heater shall be placed at the same height as the head of the relevant 
energy efficiency class;  
V. the annual electricity consumption in kWh  in terms of  final energy and/or 
the annual fuel consumption in GJ  in terms of  GCV , under a verage , colder 
and warmer climate conditions, rounded to the nearest integer and 
calculated in accordance with point 4 of Annex VIII;  
VI. European temperature map display ing three indicative temperature zones;  
VII. the sound power level LWA, indoors  (if ap plicable) and outdoors , in dB, 
rounded to the nearest integer ; 
VIII.  for heat pump water heaters able to work only during off -peak hours, the 
pictogram referred to  in point 6(d)(11)  of this Annex may be added . 
(b) The design aspects of the label for heat pump  water heaters shall be in 
accordance with point 6 of this Annex . By way of exception , where a model has 
been granted a n ‘EU Ecolabel’ under Regulation (EC) No 66/2010 of the 
European Parliament and of the Council5, a copy of the EU Ecolabel may be 
added.  
                                                
5 OJ L 27, 30.1.2010, p. 1.  
EN 21   EN 1.2. Label 2  
1.2.1.  Conventional water heaters  in water heating energy efficiency  classes A+ to F 
 
(a) The information listed in point 1 .1.1(a) of this Annex shall be included in the 
label.   
EN 22   EN (b) The design aspects of the label for conventional water heaters shall be in 
accord ance with point 4  of this Annex .  
EN 23   EN 1.2.2.  Solar water heaters  in water heating energy efficiency  classes A+ to F 
 
(a) The information listed in point 1 .1.2(a) of this Annex shall be included in the 
label.  
(b) The design aspects of the label for solar water heaters shall be in accordance 
with point 5  of this Annex .  
EN 24   EN 1.2.3.  Heat pump  water heaters  in water heating energy efficiency  classes A+ to F 
 
(a) The information listed in point 1 .1.3(a) of this Annex shall be included in the 
label.  
(b) The design aspects of the label for heat pump water heaters shall be in 
accordance with point 6 of this Annex .  
EN 25   EN 2. Hot water storage tank s 
2.1. Label 1  for hot water storage tank s in energy efficiency classes A to G  
 
(a) The following information shall be included in the label:  
I. supplier ’s name or trade mark ;  
EN 26   EN II. supplier ’s model identifier;  
III. the water storage function;  
IV. the energy efficiency class, determined in accordance with point 2 of 
Annex II ; the head of the arrow containing the energy efficiency class of 
the hot water storage tank  shall be placed  at the same height as the head 
of the relevant energy efficiency class;  
V. the standing loss in W, rounded to the nearest integer;  
VI. the hot water storage tank  volume in litres, rounded to the nearest integer.  
(b) The design aspects of the label for hot wat er storage tank s shall be in 
accordance with point 7 of this Annex .  
EN 27   EN 2.2. Label 2  for hot water storage tank s in energy efficiency classes A+ to F 
 
(a) The information listed in point 2 .1(a) of this Annex shall be included in the 
label.  
(b) The design aspects of the l abel for hot water storage tank s shall be in 
accordance with point 7 of this Annex.   
EN 28   EN 3. Package s of water heater  and solar device  
Label  for package s of water heater  and  solar device  in water heating energy 
efficiency  classes  A+++ to G  
 
(a) The following informat ion shall be included in the label:  
I. dealer ’s name or trade mark;  
II. dealer ’s model (s) identifier;   
EN 29   EN III. the water heating function, displayed as a pictogram of the declared load 
profile in accordance with Table 3  of this Annex;  
IV. the water heating ene rgy efficiency  class  of the water heater , determined 
in accordance with point 1 of Annex II ; 
V. indication  of whether  a hot water storage tank  and solar collector may be  
included in the package  of water heater  and solar device ; 
VI. the water heating energy  efficiency  class  of the package  of water heater  
and solar device , determined in accordance with point 4 of Annex IV ; the 
head of the arrow containing the water heating energy efficiency  class of 
the package  of water heater  and solar device  shall be placed  at the same 
height as the head of the relevant energy efficiency class . 
(b) The design aspects of the label for package s of water heater  and solar device  
shall be in accordance with point 8 of this Annex.  For package s of water heater  
and solar device  in water  heating energy efficiency  classes A+++ to D, the last 
classes E  to G in the A+++ to G scale may be omitted.   
EN 30   EN 4. The design of the label for conventional water heaters shall be the following:  
  
EN 31   EN Whereby:  
(a) The label shall be at least 105 mm wide and 200 mm high.  Where the label is 
printed in a larger format, its content shall nevertheless remain proportionate to 
the specifications above.  
(b) The background shall be white.  
(c) Colours are coded as CMYK — cyan, magenta, yellow and black, following 
this example: 00 -70-X-00: 0 % cyan, 70  % magenta, 100  % yellow, 0  % black.  
(d) The label shall fulfil all of the following requirements (numbers refer to the 
figure above):  
 EU label border stroke: 4 pt, colour: cyan 100  %, round corners: 3 ,5 
mm. 
 EU logo: Colours: X -80-00-00 and 0 0-00-X-00. 
 Energy label:  Colour: X -00-00-00. Pictogram as depicted: EU logo + 
energy label:  width: 86 mm, height: 17 mm.  
 Sub-logos border: 1 pt, colour: cyan 100  %, length: 86 mm.  
 Water heating function:  
– Pictogram of the declared load profile,  as depicted  in Table 3  of 
this Annex . 
 A-G or A+-F scale:  
– Arrow:  height: 7 mm, gap: 1 mm , colours:  
Highest class: X -00-X-00, 
Second class: 70 -00-X-00, 
Third class: 30 -00-X-00, 
Fourth class: 00 -00-X-00, 
Fifth class: 00 -30-X-00, 
Sixth class: 00 -70-X-00, 
Last clas s: 00 -X-X-00, 
– Text: Calibri bold 16  pt, capitals, white, ‘+’ symbol: superscript,  
aligned on a single row . 
 Water heating energy efficiency  class:  
– Arrow: width:  22 mm, height: 12 mm, 100  % black , 
– Text: Calibri bold 24 pt, capitals, white , ‘+’ symbol: superscript,  
aligned on a single row . 
 Sound power level , indoors :  
EN 32   EN – Pictogram  as depicted , 
– Border: 2 pt – colour: cyan 100  % – round corners: 3 ,5 mm, 
– Value ‘YZ’: Calibri bold 20 pt, 100  % black , 
– Text ‘dB’: Calibri regular 1 5 pt, 100  % black . 
 Annual energy co nsumption in kWh/annum or GJ/annum:  
– Border: 2 pt – colour: cyan 100  % – round corners: 3 ,5 mm, 
– Value ‘VWXYZ ’ or ‘XYZ ’: Calibri bold at least 20 pt, 100  % 
black , 
– Text ‘kWh/annum ’ or ‘GJ/annum ’: Calibri regular at least 15 pt, 
100  % black . 
 If applicable, o ff-peak fitness : 
– Pictogram  as depicted , 
– Border: 2 pt, colour: cyan 100  %, round corners: 3 ,5 mm. 
 Number of Regulation and reference year : 
– Text: Calibri bold 10  pt. 
 Supplier ’s name or trademark.  
 Supplier ’s model identifier:  
The suppliers ’ name or trad e mark and model identifier shall  fit in a space 
of 86  x 12 mm.   
EN 33   EN 5. The design of the label for solar water heaters shall be the following:  
  
EN 34   EN Whereby:  
(a) The label shall be at least 105 mm wide and 200 mm high. Where the label is 
printed in a larger format, its content shall nevertheless remain proportionate to 
the specifications above.  
(b) The background shall be white.  
(c) Colours are coded as CMYK — cyan, magenta, yellow and black, following 
this example: 00 -70-X-00: 0  % cyan, 70  % magenta, 100  % yellow, 0  % black.  
(d) The label shall fulfil all of the following requirements (numbers refer to the 
figure above):  
 EU label border stroke: 4 pt, colour: cyan 100  %, round corners: 3 ,5 
mm. 
 EU logo: Colours: X -80-00-00 and 00 -00-X-00. 
 Energy label:  Colour: X -00-00-00. Pict ogram as depicted: EU logo + 
energy label: width: 86 mm, height: 17 mm.  
 Sub-logos border: 1 pt, colour: cyan 100  %, length: 86 mm.  
 Water heating function:  
– Pictogram of the declared load profile , as depicted in Table 3  of 
this Annex.  
 A-G or A+-F scale : 
– Arrow:  height: 7 mm, gap: 1 mm , colours:  
Highest class: X -00-X-00, 
Second class: 70 -00-X-00, 
Third class: 30 -00-X-00, 
Fourth class: 00 -00-X-00, 
Fifth class: 00 -30-X-00, 
Sixth class: 00 -70-X-00, 
Last class: 00 -X-X-00, 
– Text: Calibri bold 16  pt, capitals, w hite, ‘+’ symbol: superscript,  
aligned on a single row.  
 Water heating energy efficiency  class:  
– Arrow: width:  22 mm, height: 12 mm, 100  % black , 
– Text: Calibri bold 24 pt, capitals, white , ‘+’ symbol: superscript,  
aligned on a single row . 
 Sound power lev el, indoors :  
EN 35   EN – Pictogram as depicted , 
– Border: 2 pt, colour: cyan 100  %, round corners: 3 ,5 mm, 
– Value ‘YZ’: Calibri bold 15 pt, 100  % black , 
– Text ‘dB’: Calibri regular 10 pt, 100  % black . 
 Annual energy consumption in kWh/annum or GJ/annum:  
– Border: 2 pt, colour: cyan 100  %, round corners: 3 ,5 mm, 
– Values ‘VWXYZ ’ or ‘XYZ ’: Calibri at least 12 pt, 100  % black  
– Text ‘kWh/annum ’ or ‘GJ/annum ’: Calibri regular at least 10 pt, 
100  % black  
 European solar map and colour squares:  
– Pictogram as depicted , 
– Colours : Dark bl ue: 86 -51-00-00,  
Middle blue: 53 -08-00-00,  
Light blue:  25-00-02-00. 
 Number of Regulation and reference year : 
– Text: Calibri bold 10  pt. 
 Supplier ’s name or trademark.  
 Supplier ’s model identifier:  
The suppliers ’ name or trade mark and model identifier  shall  fit in a space 
of 86  x 12 mm.   
EN 36   EN 6. The design of the label for heat pump  water heaters shall be the following:  
  
EN 37   EN Whereby:  
(a) The label shall be at least 105 mm wide and 200 mm high. Where the label is 
printed in a larger format, its content shall neverthel ess remain proportionate to 
the specifications above.  
(b) The background shall be white.  
(c) Colours are coded as CMYK — cyan, magenta, yellow and black, following 
this example: 00 -70-X-00: 0  % cyan, 70  % magenta, 100  % yellow, 0  % black.  
(d) The label shall fulfil al l of the following requirements (numbers refer to the 
figure above):  
 EU label border stroke: 4 pt , colour: cyan 100  %, round corners: 3 ,5 mm.  
 EU logo: Colours: X -80-00-00 and 00 -00-X-00. 
 Energy label:  Colour: X -00-00-00. Pictogram as depicted: EU log o + 
energy label:  width: 86 mm, height: 17 mm.  
 Sub-logos border: 1 pt, colour: cyan 100  %, length: 86 mm.  
 Water heating function:  
– Pictogram of the declared load profile , as depicted in Table 3  of 
this Annex.  
 A-G or A+-F scale:  
– Arrow:  height: 7 mm, ga p: 1 mm , colours:  
Highest class: X -00-X-00, 
Second class: 70 -00-X-00, 
Third class: 30 -00-X-00, 
Fourth class: 00 -00-X-00, 
Fifth class: 00 -30-X-00, 
Sixth class: 00 -70-X-00, 
Last class: 00 -X-X-00, 
– Text: Calibri bold 16  pt, capitals, white, ‘+’ symbol: supersc ript, 
aligned on a single row.  
 Water heating energy efficiency  class:  
– Arrow: width:  22 mm, height: 12 mm, 100  % black , 
– Text: Calibri bold 24 pt, capitals, white , ‘+’ symbol: superscript,  
aligned on a single row . 
 Sound power level , indoors  (if applicabl e) and outdoors : 
– Pictogram as depicted ,  
EN 38   EN – Border: 2 pt, colour: cyan 100  %, round corners: 3 ,5 mm, 
– Value ‘YZ’: Calibri bold 15 pt, 100  % black , 
– Text ‘dB’: Calibri regular 10 pt, 100  % black . 
 Annual energy consumption in kWh/annum or GJ/annum:  
– Border: 2 pt, colour: cyan 100  %, round corners: 3 ,5 mm, 
– Values ‘VWXYZ ’ or ‘XYZ ’: Calibri at least 12 pt, 100  % black , 
– Text ‘kWh/annum ’ or ‘GJ/annum ’: Calibri regular at least 10pt, 
100  % black . 
 European temperature  map and colour squares:  
– Pictogram as depicted , 
– Colo urs: Dark blue: 86 -51-00-00,  
Middle blue: 53 -08-00-00,  
Light blue:  25-00-02-00. 
 If applicable, o ff-peak fitness : 
– Pictogram as depicted , 
– Border: 2 pt, colour: cyan 100  %, round corners: 3 ,5 mm. 
 Number of Regulation and reference year : 
– Text: Calibri bo ld 10 , 
 Supplier ’s name or trademark.  
 Supplier ’s model identifier:  
The suppliers ’ name or trade mark and model identifier shall  fit in a space 
of 86  x 12 mm.   
EN 39   EN 7. The design of the label for hot water storage tank s shall be the following:  
  
EN 40   EN Whereby:  
(a) The lab el shall be at least 105 mm wide and 200 mm high. Where the label is 
printed in a larger format, its content shall nevertheless remain proportionate to 
the specifications above.  
(b) The background shall be white.  
(c) Colours are coded as CMYK — cyan, magenta, yel low and black, following 
this example: 00 -70-X-00: 0  % cyan, 70  % magenta, 100  % yellow, 0  % black.  
(d) The label shall fulfil all of the following requirements (numbers refer to the 
figure above):  
 EU label border stroke: 4 pt, colour: cyan 100  %, round cor ners: 3 ,5 
mm. 
 EU logo: Colours: X -80-00-00 and 00 -00-X-00. 
 Energy label:  Colour: X -00-00-00. Pictogram as depicted: EU logo + 
energy label:  width: 86 mm, height: 17 mm.  
 Sub-logos border: 1 pt, colour: cyan 100  %, length: 86 mm.  
 Storage function:  
– Pictogram  as depicted . 
 A-G or A+-F scale:  
– Arrow:  height: 7 mm, gap: 1 mm , colours:  
Highest class: X -00-X-00, 
Second class: 70 -00-X-00, 
Third class: 30 -00-X-00, 
Fourth class: 00 -00-X-00, 
Fifth class: 00 -30-X-00, 
Sixth class: 00 -70-X-00, 
Last class: 00 -X-X-00, 
– Text: Calibri bold 16  pt, capitals, white, ‘+’ symbol: superscript,  
aligned on a single row.  
 Energy efficiency class:  
– Arrow: width:  22 mm, height: 12 mm, 100  % black , 
– Text: Calibri bold 24 pt, capitals, white , ‘+’ symbol: superscript,  
aligned on a sin gle row . 
 Standing loss:  
– Border: 2 pt, colour: cyan 100  %, round corners: 3 ,5 mm,  
EN 41   EN – Value ‘YZ’: Calibri bold 45 pt, 100  % black , 
– Text ‘W’: Calibri regular 30 pt, 100  % black . 
 Storage volume:  
– Border: 2 pt, colour: cyan 100  %, round corners: 3 ,5 mm, 
– Value ‘XYZ ’: Calibri bold 45 pt, 100  % black , 
– Text ‘L’: Calibri regular 30 pt, 100  % black . 
 Number of Regulation and reference year : 
– Text: Calibri bold 10  pt. 
 Supplier ’s name or trademark.  
 Supplier ’s model identifier:  
The suppliers ’ name or trade mark and m odel identifier shall  fit in a space 
of 86  x 12 mm.   
EN 42   EN 8. The design of the label for package s of water heater  and solar device  shall be the 
following:  
 
Whereby:   
EN 43   EN (a) The label shall be at least 210 mm wide and 297 mm high. Where the label is 
printed in a larger fo rmat, its content shall nevertheless remain proportionate to 
the specifications above.  
(b) The background shall be white.  
(c) Colours are coded as CMYK — cyan, magenta, yellow and black, following 
this example: 00 -70-X-00: 0  % cyan, 70  % magenta, 100  % yellow, 0  % black.  
(d) The label shall fulfil all of the following requirements (numbers refer to the 
figure above):  
 EU label border stroke: 6 pt, colour: cyan 100  %, round corners: 3 ,5 
mm. 
 EU logo: Colours: X -80-00-00 and 00 -00-X-00. 
 Energy label: Colour: X -00-00-00. Pictogram as depicted: EU logo + 
energy label: width: 191 mm, height: 37 mm.  
 Sub-logos border: 2 pt, colour: cyan 100  %, length: 191 mm.  
 Water heating function:  
– Pictogram of the declared load profile , as depicted in Table 3  of 
this Annex.  
 Water  Heater:  
– Pictogram  as depicted.  
– Water heating energy efficiency  class  of water heater :  
Arrow: width:  24 mm, height: 14 mm, 100  % black ,  
Text: Calibri bold 28 pt, capitals, white , 
– Border: 3 pt, colour: cyan 100  %, round corners: 3 ,5 mm. 
 Package  with hot water storage tank  and  solar collector : 
– Pictogram s as depicted , 
– ‘+’ symbol: Calibri bold 50  pt, cyan 100  %, 
– Boxes: width: 12 mm, height: 12 mm, border: 4 pt, cyan 100  %, 
– Border: 3 pt – colour: cyan 100  % – round corners: 3 ,5 mm. 
 A+++-G scale with border : 
– Arrow:  height: 15 mm, gap: 3 mm , colours:  
Highest class: X -00-X-00, 
Second class: 70 -00-X-00,  
EN 44   EN Third class: 30 -00-X-00, 
Fourth class: 00 -00-X-00, 
Fifth class: 00 -30-X-00, 
Sixth class: 00 -70-X-00, 
Seventh class: 00 -X-X-00, 
If applicable, last  class es: 00-X-X-00, 
– Text: Calibri bold 30  pt, capitals, white, ‘+’ symbols: superscript,  
aligned on a single row , 
– Border:  3 pt, colour: cyan 100  %, round corners: 3 ,5 mm. 
 Water heating energy efficiency  class  for package  of water heater  and  
solar device : 
– Arrow: width : 33 mm, height: 19 mm, 100  % black , 
– Text: Calibri bold 40 pt, capitals, white, ‘+’ symbols: superscript, 
aligned on a single row . 
 Number of Regulation and r eference year : 
– Text: Calibri bold 12  pt. 
 Dealer ’s name or trademark.  
 Dealer ’s model identifie r: 
The dealers ’ name or trade mark and model identifier shall  fit in a space 
of 191  x 19 mm.   
EN 45   EN Table 3 : Pictograms and typical usage for load profiles of water heaters  
Declared  
load profile  Pictogram  Typical usage  
3XS 
 Small s ingle basin at 35  °C 
XXS  
 Single basin at 35 °C 
XS 
 Electric shower  
S 
 Shower and s ingle basin at 35  °C 
M 
 Showers and s ink at 55  °C 
L 
 Bath , shower and sink at 55  °C 
XL 
 Multiple baths and showers  
XXL  
 Simultaneous bath s and showers  
3XL  
 Small collective  hou sing 
4XL  
 Large collective  housing   
EN 46   EN ANNEX I V 
Product Fiche  
1. Water heaters  
1.1. The information in the product fiche of the water heater shall be provided in the 
following order and shall be included in the product brochure or other literature 
provided with t he product:  
(a) supplier ’s name or trade mark;  
(b) supplier ’s model identifier;  
(c) the declared load profile , expressed by the appropriate letter and typical usage 
in accordance with Table 3  of Annex III ; 
(d) the water heating energy efficiency  class of the model, determ ined in 
accordance with point 1 of Annex II , whereby: for solar water heaters and heat 
pump water heaters , under average climate conditions ; 
(e) the water heating energy efficiency  in % , rounded to the nearest integer and 
calculated in accordance with point 3 of Annex VIII , whereby: for solar water 
heaters and heat pump water heaters , under average climate conditions ; 
(f) the annual electricity consumption in kWh  in terms of  final energy and/or the 
annual fuel consumption  in GJ in terms of  GCV , rounded to the neare st integer 
and calculated in accordance with point 4 of Annex VIII , whereby: for solar 
water heaters and heat pump water heaters , under average climate conditions ; 
(g) if applicable, other load profiles for which the water heater is suitable to use  and 
the cor responding water heating energy efficiency  and annual electricity 
consumption as set out in  point s (e) and ( f); 
(h) the thermostat temperature settings of the water heater, as placed on the market 
by the supplier;  
(i) the sound power level LWA, indoors , in dB, rou nded to the nearest integer  (for 
heat pump water heaters if applicable ); 
(j) if applicable, an indication  that the water heater is able to work only during off -
peak hours;  
(k) any specific precautions that shall be taken when the water heater is assembled, 
install ed or maintained;  
(l) where the value of smart  is declared as being ‘1’, an indication  that the 
information on water heating energy efficiency , annual electricity and fuel 
consumption, as applicable, relate to enabled smart control settings only;  
in addition , for solar water heaters and heat pump water heaters:   
EN 47   EN (m) the water heating energy efficiency  in % , under colder and warmer climate 
conditions, rounded to the nearest integer and calculated in accordance with 
point 3 of Annex VIII;  
(n) the annual electricity consum ption in kWh in terms of fi nal energy and/or the 
annual fuel consumption  in GJ in terms of  GCV , under colder and warmer 
climate conditions, rounded to the nearest integer and calculated in accordance 
with point 4 of Annex VIII ; 
in addition , for solar water  heaters:  
(o) the collector aperture area in m ², to two decimal places;  
(p) the zero-load efficiency , to three decimal places;  
(q) the first-order coefficient in W/(m² K) , to two decimal places;  
(r) the second -order coefficient in W/(m² K²) , to three  decimal places;  
(s) the incidence angle modifier, to two decimal places;  
(t) the storage volume in litres, rounded to the nearest integer;  
(u) the pump power consumption in W, rounded to the nearest integer;  
(v) the standby power consumption in W, to two decimal places;  
in addition, for heat  pump water heaters:  
(w) the sound power level LWA, outdoors , in dB, rounded to the nearest integer . 
1.2. One fiche may cover a number of water heater models supplied by the same supplier.  
1.3. The information contained in the fiche may be given in the form of a copy of  the 
label, either in colour or in black and white. Where this is the case, the information 
listed in point 1.1 not already displayed on the label shall also be provided.  
2. Hot water storage tank s 
2.1. The information in the product fiche of the hot water storage  tank  shall be provided in 
the following order and shall be included in the product brochure or other literature 
provided with the product:  
(a) supplier ’s name or trade mark;  
(b) supplier ’s model identifier;  
(c) the energy efficiency class of the model, determined in accordance with point 2 
of Annex II ; 
(d) the standing loss in W, rounded to the nearest integer;  
(e) the storage volume in litres, rounded to the nearest integer .  
EN 48   EN 2.2. One fiche may cover a number of hot water storage tank  models supplied by the same 
supplier.  
2.3. The info rmation contained in the fiche may be given in the form of a copy of the 
label, either in colour or in black and white. Where this is the case, the information 
listed in point 2.1 not already displayed on the label shall also be provided.  
3. Solar device s 
3.1. The information in the product fiche of the solar device  shall be provided in the 
following order and shall be included in the product brochure or other literature 
provided with the product : 
(a) supplier ’s name or trade mark;  
(b) supplier ’s model identifier;  
(c) the collector aperture area in m ², to two decimal places;  
(d) the zero-load efficiency , to three decimal places;  
(e) the first-order coefficient in W/(m² K) , to two decimal places;  
(f) the second -order coefficient in W/(m² K) , to three  decimal places;  
(g) the incidence angle modi fier, to two decimal places;  
(h) the storage volume in litres, rounded to the nearest integer;  
(i) the annual non-solar  heat contribution Q nonsol in kWh  in terms of primary 
energy  for electricity and/or in kWh  in terms of  GCV  for fuels , for the load 
profiles M, L,  XL, XXL, 3XL and 4XL  under average climate conditions , 
rounded  to the nearest integer ; 
(j) the pump power consumption in W, rounded to the nearest integer;  
(k) the standby power consumption in W, to two decimal places;  
(l) the annual auxiliary e lectricity  consumption  Qaux in kWh  in terms of final 
energy , rounded to the nearest integer . 
3.2. One fiche may cover a number of solar device  models supplied by the same supplier.  
4. Package s of water heater  and solar device  
The fiche for package s of water heater  and solar device  shall contain the elements set 
out in Figure 1 for evaluating the water heating energy efficiency  of a package  of 
water heater  and solar device , where the following information shall be included:  
– I: the value of the water  heating energy efficiency of the water  heater , expressed 
in %;  
EN 49   EN – II: the value of the mathematical expression (220 · Qref)/Qnonsol, where Qref is 
taken from Table 4  in Annex VII  and Qnonsol from the product fiche of the solar 
device  for the declared  load profile M, L, XL, XXL, 3XL  or 4XL  of the water 
heater ; 
– III: the value of the mathematical expression ( Qaux · 2,5)/(220 · Qref), expressed 
in %, where Qaux is taken from the product fiche of the solar device  and Q ref 
from Table 4  in Annex VII  for the declared load profile M, L, XL, XXL, 3XL 
or 4XL .  
EN 50   EN Figure 1: Fiche for a package  of water heater  and solar device  indicating  the water heating 
energy efficiency  of the package  offered  
 
EN 51   EN ANNEX V 
Technical documentation  
1. Water heaters  
For water heaters, t he technical documentation referred to in Article 3( 1)(c) shall 
include:  
(a) the name and address of the supplier;  
(b) a description of the water heater model sufficient for its unambiguous 
identification ; 
(c) where appropriate, the references of the harmonised standards applied;  
(d) where appropriate, the other technical standards and specifications used;  
(e) the identification and signature of the person empowered to bind the supplier;  
(f) the results of the measurements for the technical parameters specified in point 7 
of Annex VII ; 
(g) the results of the calculations for the techni cal parameters specified in point 2 of 
Annex VIII ; 
(h) any specific precautions that shall be taken when the water heater is assembled, 
installed or maintained . 
2. Hot water storage tank s 
For hot water storage tank s, the technical documentation referred to in Art icle 3(2 )(c) 
shall include:  
(a) the name and address of the supplier;  
(b) a description of the hot water storage tank  model sufficient for its unambiguous 
identification ; 
(c) where appropriate, the references of the harmonised standards applied;  
(d) where appropriate, the  other technical standards and specifications used;  
(e) the identification and signature of the person empowered to bind the supplier;  
(f) the results of the measurements for the technical parameters  specified in point 8 
of Annex VII ; 
(g) any specific precautions that  shall be taken when the hot water storage tank  is 
assembled, installed or maintained .  
EN 52   EN  
3. Solar device s 
The technical documentation of solar device s referred to in Article 3(3 )(b) shall 
include:  
(a) the name and address of the supplier;  
(b) a description of the sol ar device  model sufficient for its unambiguous 
identification ; 
(c) where appropriate, the references of the harmonised standards applied;  
(d) where appropriate, the other technical standards and specifications used;  
(e) the identification and signature of the person e mpowered to bind the supplier;  
(f) the results of the measurements for the technical parameters as specified in 
point 9 of Annex VII ; 
(g) any specific precautions that shall  be taken when the solar device  is assembled, 
installed or maintained .  
EN 53   EN ANNEX V I 
Informatio n to be provided in cases where end -users cannot be expected to see the 
product displayed  
1. Water heaters  
1.1. The information referred to in Article 4(1 )(b) shall be provided in the following 
order:  
(a) the declared load profile, expressed by the appropriate letter and typical usage 
in accordance with Table 4 of Annex VII; 
(b) the water heating energy efficiency  class of the model , under average climate 
conditions, in accordance with point 1 of Annex II ; 
(c) the water heating energy efficiency  in % , under average climate con ditions, 
rounded to the nearest integer and calculated in accordance with point 3 of 
Annex VIII;  
(d) the annual electricity consumption in kWh in terms of  final energy and/or the 
annual fuel consumption in GJ in terms of  GCV , under average climate 
conditions, rounded to the nearest integer and calculated in accordance with 
point 4 of Annex VIII;  
(e) the sound power level, indoors , in dB, rounded to the nearest integer  (for heat 
pump water heaters , if applicable ); 
in addition , for solar water heaters and heat pump w ater heaters:  
(f) the water heating energy efficiency  in % , under colder and warmer climate 
conditions, rounded to the nearest integer and calculated in accordance with 
point 3 of Annex VIII;  
(g) the annual electricity consumption in kWh in terms of  final energy and/or the 
annual fuel consumption  in GJ in terms of  GCV , under colder and warmer 
climate conditions, rounded to the nearest integer and calculated in accordance 
with point 4 of Annex VIII ; 
in addition, for solar water heaters:  
(h) the collector aperture area i n m², to two decimal places;  
(i) the storage volume in litres, rounded to the nearest integer ; 
in addition, for heat pump water heaters:  
(j) the sound power level, outdoors , in dB, rounded to the nearest integer.  
1.2. Where other information contained in the product fi che is also provided, it shall be in 
the form and order specified in point 1 of Annex IV .  
EN 54   EN 1.3. The size and font in which the information referred in points 1.1 and 1.2 is printed or 
shown shall be legible.  
2. Hot water storage tank s 
2.1. The information referred to in  Article 4(2 )(b) shall be provided in the following 
order:  
(a)  the energy efficiency class of the model, determined in accordance with point 2 
of Annex II ; 
(b)  the standing loss in W, rounded to the nearest integer;  
(c)  the storage volume in litres, rounded to the nearest integer;  
2.2. The size and font in which the information referred in point 2.1 is printed or shown 
shall be legible.   
EN 55   EN ANNEX VI I 
Measurements  
1. For the purposes of compliance and verification of compliance with the requirements of 
this Regulation, mea surements shall be made using harmonised standards the reference 
numbers of which have been published for th is purpose in the Official Journal of the 
European Union , or using other  reliable, accurate and reproducible measurement method s 
that take into acco unt the generally recognised state -of-the-art methods . They shall meet  
the conditions and technical parameters set out in points 2 to 9. 
2. General conditions for testing water heaters : 
(a) measurements shall be carried out using the load profiles set out in Table 4; 
(b) measurements shall be carried out using a 24 -hour measurement cycle as follows:  
– 00:00 to 06:59: no water draw -off; 
– from 07:00: water draw -offs according to the declared load profile;  
– from end of last water draw -off until 24:00: no water draw -off; 
(c) the declared load profile shall be the maximum load profile or the load profile one 
below the maximum load profile.   
EN 56   EN Table 4 : Load profiles of water heaters  
 3XS XXS  XS S 
 Qtap f Tm Qtap f Tm Qtap f Tm Qtap f Tm Tp 
h kWh  l/min  ºC kWh  l/min  ºC kWh  l/min  ºC kWh l/min  ºC ºC 
07:00  0,015  2 25 0,105  2 25       0,105  3 25   
07:05  0,015  2 25                
07:15  0,015  2 25                
07:26  0,015  2 25                
07:30  0,015  2 25 0,105  2 25 0,525  3 35 0,105  3 25   
07:45                            
08:01                            
08:05                     
08:15                     
08:25                     
08:30      0,105  2 25     0,105  3 25   
08:45                            
09:00  0,015  2 25                
09:30  0,015  2 25 0,105  2 25     0,105  3 25   
10:00                            
10:30                            
11:00                     
11:30  0,015  2 25 0,105  2 25     0,105  3 25   
11:45  0,015  2 25 0,105  2 25     0,105  3 25   
12:00  0,015  2 25 0,105  2 25               
12:30  0,015  2 25 0,105 2 25           
12:45  0,015  2 25 0,105  2 25 0,525  3 35 0,315  4 10 55 
14:30  0,015  2 25                
15:00  0,015  2 25                
15:30  0,015  2 25                
16:00  0,015  2 25                
16:30                     
17:00                     
18:00        0,105  2 25       0,105  3 25   
18:15      0,105  2 25     0,105  3 40   
18:30  0,015  2 25 0,105  2 25               
19:00  0,015  2 25 0,105  2 25           
19:30  0,015  2 25 0,105  2 25           
20:00        0,105  2 25               
20:30           1,05 3 35 0,42 4 10 55 
20:45      0,105  2 25           
20:46                            
21:00        0,105  2 25               
21:15  0,015  2 25 0,105  2 25           
21:30  0,015  2 25          0,525  5 45   
21:35  0,015  2 25 0,105  2 25           
21:45  0,015  2 25 0,105  2 25               
Qref 0,345      2,100      2,100      2,100         
EN 57   EN Continued Table 4 : Load profiles of water heaters  
 M L XL 
 Qtap f Tm Tp Qtap f Tm Tp Qtap f Tm Tp 
h kWh  l/mn ºC ºC kWh  l/min  ºC ºC kWh  l/min  ºC ºC 
07:00  0,105 3 25   0,105  3 25   0,105  3 25   
07:05  1,4 6 40   1,4 6 40        
07:15              1,82 6 40   
07:26              0,105  3 25   
07:30  0,105  3 25   0,105  3 25        
07:45        0,105  3 25   4,42 10 10 40 
08:01  0,105  3 25           0,105  3 25   
08:05        3,605  10 10 40      
08:15  0,105  3 25         0,105  3 25   
08:25        0,105  3 25        
08:30  0,105  3 25   0,105  3 25   0,105  3 25   
08:45  0,105  3 25   0,105  3 25   0,105  3 25   
09:00  0,105  3 25   0,105  3 25   0,105  3 25   
09:30  0,105  3 25   0,105  3 25   0,105  3 25   
10:00                  0,105  3 25   
10:30  0,105  3 10 40 0,105  3 10 40 0,105  3 10 40 
11:00                  0,105  3 25   
11:30  0,105  3 25   0,105  3 25   0,105  3 25   
11:45  0,105  3 25   0,105  3 25   0,105  3 25   
12:00                   
12:30                   
12:45  0,315  4 10 55 0,315  4 10 55 0,735  4 10 55 
14:30  0,105  3 25   0,105  3 25   0,105  3 25   
15:00              0,105  3 25   
15:30  0,105  3 25   0,105  3 25   0,105  3 25   
16:00              0,105  3 25   
16:30  0,105  3 25   0,105  3 25   0,105  3 25   
17:00                  0,105  3 25   
18:00  0,105  3 25   0,105  3 25   0,105  3 25   
18:15  0,105  3 40   0,105  3 40   0,105  3 40   
18:30  0,105  3 40   0,105  3 40   0,105  3 40   
19:00  0,105  3 25   0,105  3 25   0,105  3 25   
19:30                          
20:00                   
20:30  0,735  4 10 55 0,735  4 10 55 0,735  4 10 55 
20:45                   
20:46              4,42 10 10 40 
21:00          3,605  10 10 40         
21:15  0,105  3 25         0,105  3 25   
21:30  1,4 6 40   0,105  3 25   4,42 10 10 40 
21:35                   
21:45                          
Qref 5,845        11,655       19,07        
EN 58   EN Continued Table 4 : Load profiles of water heaters  
 XXL  3XL  4XL  
 Qtap f Tm Tp Qtap f Tm Tp Qtap f Tm Tp 
h kWh  l/min ºC ºC kWh  l/min  ºC ºC kWh  l/min  ºC ºC 
07:00  0,105  3 25   11,2 48 40   22,4 96 40   
07:05                   
07:15  1,82 6 40              
07:26  0,105  3 25              
07:30                   
07:45  6,24 16 10 40            
08:01  0,105  3 25   5,04 24 25   10,08  48 25   
08:05                   
08:15  0,105  3 25              
08:25                   
08:30  0,105  3 25              
08:45  0,105  3 25                   
09:00  0,105  3 25   1,68 24 25   3,36 48 25   
09:30  0,105  3 25              
10:00  0,105  3 25                   
10:30  0,105  3 10 40 0,84 24 10 40 1,68 48 10 40 
11:00  0,105  3 25                   
11:30  0,105  3 25              
11:45  0,105  3 25   1,68 24 25   3,36 48 25   
12:00                   
12:30                   
12:45  0,735  4 10 55 2,52 32 10 55 5,04 64 10 55 
14:30  0,105  3 25                   
15:00  0,105  3 25              
15:30  0,105  3 25   2,52 24 25   5,04 48 25   
16:00  0,105  3 25              
16:30  0,105  3 25              
17:00  0,105  3 25                   
18:00  0,105  3 25              
18:15  0,105  3 40              
18:30  0,105  3 40   3,36 24 25   6,72 48 25   
19:00  0,105  3 25                   
19:30                          
20:00                   
20:30  0,735  4 10 55 5,88 32 10 55 11,76  64 10 55 
20:45                   
20:46  6,24 16 10 40            
21:00                          
21:15  0,105  3 25              
21:30  6,24 16 10 40 12,04  48 40   24,08  96 40   
21:35                   
21:45                   
Qref 24,53     46,76       93,52        
EN 59   EN 3. Conditions for testing  the smart control compliance ( smart ) of water heaters  
Where the supplier deems it appropriate to declare the value of smart  as being ‘1’, 
measurements of the weekly electricity and/or fuel consumption with smart controls and 
the weekly electricity and/or fuel consumption without smart controls shall be carried out 
using a two -week measurement cycle as follows:  
– days 1 to 5: random sequence of load profiles chosen from the declared load profile 
and the load profile below the declared load profile, and smart control disabled;  
– days 6 and 7: no water draw -offs, and smart control disabled;  
– days 8 to 12: repetition of the same sequence applied for days 1 to 5, and smart 
control enabled;  
– days 13 and 14: no water draw -offs, and smart control enabl ed; 
– the difference between the useful energy content measured during days 1 to 7 and the 
useful energy content measured during days 8 to 14 shall not exceed 2  % of Qref of 
the declared load profile.  
4. Conditions for testing solar water heaters  
The s olar coll ector, solar hot water storage tank , pump in the collector loop (if applicable) 
and heat generator shall be tested separately. Where the solar collector and solar hot water 
storage tank  cannot be tested separately , they shall be tested  in combination . The heat 
generator shall be tested under the conditions set out in point 2 of this Annex.  
The results shall be used for the calculations set out in point 3(b) of Annex VIII under the 
conditions set out in Tables 5 and 6. For the purpose of establishing Qtota the efficiency of 
the heat generator using the Joule effect in electric resistance heating elements is assumed 
to be 100/ CC, expressed in % . 
5. Conditions for testing heat pump water heaters  
– Heat pump water heaters shall be tested under the conditions set out in Table 7 ; 
– Heat pump water heaters which use ventilation exhaust air as the heat source shall be 
tested under the conditions set out in Table 8 . 
6. Conditions for testing solar device s 
The s olar collector, solar hot water storage tank  and pump in the collect or loop (if 
applicable) shall be tested separately.  Where the solar collector and solar hot water storage 
tank cannot be tested separately , they shall be tested  in combination . 
The results shall be used for the calculations of Qnonsol for the load profiles  M, L, XL, 
XXL, 3XL and 4XL under the average climate conditions set out in Table s 5 and 6 and 
Qaux.  
EN 60   EN Table 5 : Average daytime temperature [°C] 
 January  February  March  April  May  June  July August  September  October  November  December  
Average climate 
conditio ns + 2,8 + 2,6 + 7,4 + 12,2 + 16,3 + 19,8 + 21,0 + 22,0 + 17,0 + 11,9 + 5,6 + 3,2 
Colder climate 
conditions  - 3,8 - 4,1 - 0,6 + 5,2 + 11,0 + 16,5 + 19,3 + 18,4 + 12,8 + 6,7 + 1,2 - 3,5 
Warmer climate 
conditions  + 9,5 + 10,1 + 11,6 + 15,3 + 21,4 + 26,5 + 28,8 + 27,9 + 23,6 + 19,0 + 14,5 + 10,4 
Table 6 : Average global solar irradiance [W/m2] 
 January  February  March  April  May  June  July August  September  October  November  December  
Average climate 
conditions  70 104 149 192 221 222 232 217 176 129 80 56 
Colder  climate 
conditions  22 75 124 192 234 237 238 181 120 64 23 13 
Warmer climate 
conditions  128 137 182 227 248 268 268 263 243 175 126 109 
Table 7 : Standard rating conditions for heat pump water heaters, temperatures in dry bulb air temperature (wet bulb  air temperature  in brackets)  
Heat source  Outdoor air  Indoor air  Exhaust 
air Brine  Water  
Climate 
conditions  Average climate 
conditions  Colder climate 
conditions  Warmer climate 
conditions  Not applicable  All climate conditions  
Temperature  + 7 °C (+ 6 °C) + 2 °C (+ 1  °C) + 14 °C (+ 13  °C) + 20 °C + 20 °C 0 °C (inlet) /  + 10 °C (inlet) /   
EN 61   EN (max imum  + 15 °C) (+ 12 °C) - 3 °C (outlet)  + 7  °C (outlet)   
EN 62   EN Table 8 : Maximum ventilation exhaust air available [m3/h], at a temperature of 20  °C and with 
humidity of 5,5 g/m3 
Declared l oad profile  XXS  XS S M L XL XXL  3XL  4XL  
Maximum v entilation exhaust air available  109 128 128 159 190 870 1 021 2 943 8 830 
7. Technical parameters of water heaters  
The following parameters shall be established  for water heaters : 
(a) the daily electr icity consumption Qelec in kWh, rounded  to three decimal places;  
(b) the declared load profile , expressed by the appropriate letter in accordance with 
Table 4  of this Annex ; 
(c) the sound power level  in dB, indoors , rounded  to the nearest integer  (for heat 
pump wa ter heaters , if applicable ); 
in addition, for water heaters using  fossil and/or biomass fuels:  
(d) the daily fuel consumption Qfuel in kWh in terms of  GCV , rounded  to three 
decimal places ; 
in addition, for water heaters for which the value of smart is declared  as being ‘1’: 
(e) the weekly fuel consumption  with smart controls  Qfuel,week,smart  in kWh  in terms 
of GCV , rounded  to three decimal places;  
(f) the weekly electricity consumption  with smart controls  Qelec,week,smart  in kWh, 
rounded  to three decimal places;  
(g) the we ekly fuel consumption without smart controls Qfuel,week  in kWh  in terms of  
GCV , rounded  to three decimal places;  
(h) the weekly electricity consumption without smart controls Qelec,week  in kWh, 
rounded  to three decimal places;  
in addition, for solar water heat ers: 
(i) the collector aperture area Asol in m², rounded  to two decimal places;  
(j) the zero -load efficiency 0, rounded  to three decimal places;  
(k) the first order coefficient a1 in W/(m² K) , rounded  to two decimal places;  
(l) the second order coefficient a2 in W/(m² K²) , rounded  to three  decimal places;  
(m) the incidence angle modifier IAM, rounded  to two decimal places;  
(n) the pump power consumption solpump  in W , rounded  to two decimal places;   
EN 63   EN (o) the standby power consumption solstandby  in W , rounded  to two decimal 
places ; 
in addition, for heat pump water heaters:  
(p) the sound power level LWA in dB, outdoors , rounded  to the neares t integer.  
8. Technical parameters of hot water storage tank s 
The following parameters shall be established for hot water storage tank s: 
(a) the storage volume V in litres, rounded  to one decimal place;  
(b) the standing loss S in W, rounded  to one decimal place.  
9. Tech nical parameters of solar device s 
The following parameters shall be established for solar device s: 
(a) the collector aperture area Asol in m², rounded  to two decimal places;  
(b) the zero -load efficiency 0, rounded  to three decimal places;  
(c) the first order coeffici ent a1 in W/(m² K) , rounded  to two decimal places;  
(d) the second order coefficient a2 in W/(m² K²) , rounded  to three  decimal places;  
(e) the incidence angle modifier IAM, rounded  to two decimal place ; 
(f) the pump power consumption solpump  in W, rounded  to two decima l places;  
(g) the standby power consumption, solstandby  in W, rounded  to two decimal 
places .  
EN 64   EN ANNEX VIII  
Method for calculating the water heating energy efficiency  of water heaters  
1. For the purposes of compliance and verification of compliance with the requirem ents 
of this Regulation, calculations shall be made using harmonised standards the 
reference numbers of which have been published for th is purpose in the Official 
Journal of the European Union , or using other appropriate  calculation method s that  
take into account the generally recognised state -of-the-art methods . They shall meet  
the technical parameters and calculations set out in points 2 to 6. 
Technical parameters used for the calculations shall be measured in accordance with 
Annex VII . 
2. Technical paramete rs of water heaters  
The following parameters shall be calculated for water heaters under average climate 
conditions:  
(a) the water heating energy efficiency  wh in %, rounded to one decimal place;  
(b) the annual electricity consumption AEC  in kWh  in terms of final  energy , 
rounded  to the nearest integer;  
in addition, for water heaters using  fuels  under  average climate conditions:  
(c) the annual fuel consumption AFC  in kWh in terms of  GCV , rounded to the 
nearest integer;  
in addition, for solar water heaters under average  climate conditions:  
(d) the heat generator water heating energy efficiency  wh,nonsol in %, rounded  to one 
decimal place;  
(e) the annual auxiliary electricity  consumption Qaux in kWh  in terms of final 
energy , rounded  to one decimal place . 
in addition, for solar water heaters and heat pump water heaters  under colder and  
warmer climat e conditions:  
(f) the parameters set out in points ( a) to (c); 
in addition for solar water heaters under  average, colder and warmer climate  
conditions:  
(g) the annual non-solar  heat contribution  Qnonsol in kWh  in terms of primary 
energy for electricity  and/or in k Wh in terms of  GCV  for fuels , rounded  to one 
decimal place ; 
3. Calculation of the water heating energy efficiency  wh 
(a) Conventional water heaters  and heat pump water heaters:   
EN 65   EN The water heating energy efficiency  is calculated as follows:  
cor elec fuelref
whQ smart SCF Q CC QQ
+ ⋅− ⋅+=) 1)( (h  
For water -/brine -to-water heat pump water heaters, the electricity consumption 
of one or more ground water pumps shall be taken into account . 
(b) Solar water heaters : 
The water heating energy efficiency  is calculated as follows:  
totaref
whQQ⋅⋅
=3666,0
h
 
Where: 
CC QQQaux
nonsolwhnonsol
tota ⋅+− ⋅=1,0 1,1,h 
4. Calculation of the annual electricity consumption AEC and the annual fuel 
consumption AFC  
(a) Conventional water heaters  and heat pump water heaters:  
The an nual electricity consumption AEC  in kWh in terms of final energy is 
calculated as  follows : 
( ) 

+ ⋅−⋅⋅⋅=CCQsmart SCF Q AECcor
elec1 3666,0  
The annual fuel consumption AFC  in GJ in terms of  GCV  is calculated as  
follows :  
( ) ( )cor fuel Q smart SCF Q AFC + ⋅−⋅⋅⋅= 1 3666,0  
(b) Solar water heaters:  
The annual electricity consumption AEC  in kWh in terms of f inal energy is 
calculated as  follows : 
CCQ
Q CC QQ CCAECtota
elec fuelelec⋅⋅+⋅=  
The annual fuel consumption AFC  in GJ in terms of  GCV  is calculated as  
follows :  
EN 66   EN tota
elec fuelfuelQQ CC QQAFC ⋅⋅+=
 
5. Determination of the smart control factor  SCF and of smart control compliance  smart  
(a) The smart control factor is calculated as  follows : 
week elec week fuelsmart week elec smart week fuel
Q CC QQ CC QSCF
, ,, , , ,1⋅+⋅+−=
 
(b) If SCF  0,07, t he value of smart  shall be 1 . In all other cases , the value of 
smart  shall be 0. 
6. Determination of the ambient correction term Qcor 
The ambient correction term is calculated as follows:  
(a) for conventional water heaters using electricity:  
( ) ( )ref elec cor Q smart SCF Q CCk Q − ⋅−⋅⋅⋅−= ) 1( 
(b) for conventional water heaters using fuels:  
( )ref fuel cor Q smart SCF Qk Q − ⋅−⋅⋅−= ) 1( 
(c) for heat pump water heaters : 
stby cor Ph k Q ⋅⋅−= 24  
Where:  
the k -values are given in Table 9 for each load profile.  
Table 9: k-values  
 3XS XXS  XS S M L XL XXL  3XL  4XL  
k 0,23 0,23 0,23 0,23 0,23 0,23 0,23 0,0 0,0 0,0  
EN 67   EN ANNEX IX  
Verification procedure for market surveillance purposes  
For the purposes of assessing the  conformity with the requirements laid down in Articles 3 
and 4, Member State authorities shall test a single water heater , hot water storage tank  or solar 
device  and pr ovide the information on the  test results to the authorities of the other Member 
States . If the measured parameters do not meet the values declared by the supplier within the 
ranges set out in Table 10, the measurement shall be carried out on three additio nal water 
heaters , hot water storage tank s or solar device s and the information on the  test results shall be 
provided to the authorities of the other Member States and to the Commission within one 
month of testing . The arithmetic mean of the measured value s of these three water heaters , hot 
water storage tank s or solar device s shall meet the values declared by the supplier within the 
range set out in Table 10. 
Otherwise, the model and all other equivalent water heater models , hot water storage tank s 
models or solar device  models shall be considered not to comply.  
Member State authorities shall use the procedures set out in Annexes VI I and VIII.  
Table 10: Verification tolerances  
Measured parameter  Verification tolerance  
Daily electricity consumption Qelec The measured value shall not be more than 
5 % higher than the rated value (*).  
Sound power level LWA, indoors  and/or 
outdoors  The measured value shall not be more than 2 
dB higher than the rated value . 
Daily fuel consumption Qfuel The measured value shall not be more than 
5 % higher than the rated value.  
Weekly fuel consumption with smart controls 
Qfuel,week,smart  The measured value shall not be more than 
5 % higher than the rated value.  
Weekly fuel consumption without smart 
controls Qfuel,week  The measur ed value shall not be more than 
5 % higher than the rated value.  
Weekly electricity consumption with smart 
controls Qelec,week,smart  The measured value shall not be more than 
5 % higher than the rated value.  
Weekly electricity consumption without 
smart c ontrols Qelec,week   The measured value shall not be more than 
5 % higher than the rated value.  
Collector aperture area Asol The measured value shall not be more than 
2 % lower than the rated value.  
Pump power consumption solpump  The measured value shall not be more than 
3 % higher than the rated value.  
Standby power consumption solstandby  The measured value shall not be more than  
EN 68   EN 5 % higher than the rated value.  
Storage volume V The measured value shall not be more than 
2 % lower than the rated value.  
Standing loss S The measured value shall not be more than 
5 % higher than the rated value.  
(*) ‘Rated value’ means the value declared by the supplier.