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Schedule – 1 

Frost Free (No-Frost) Refrigerator 

1. Scope 

1.1 This scheme specifies the energy labeling requirements for electric mains powered Frost 

Free (No-Frost) refrigerating appliance of the vapour compression type intended for 

household and similar use being manufactures, imported, or sold in India. 

1.2 This Standard shall be read in conjunction with IS 15750: 2000. 

1.3 In particular, this schedule specifies the following: 

(a) Frost Free (No-Frost) Appliance 

(b) Projected Annual Energy Consumption (PAEC) 

(c) Tested Energy Consumption (Et) 

(d) Comparative Energy Consumption (CEC) 

(e) Total Adjusted Storage Volume for No Frost (Vadj_tot_nf) 

(f) Star Rating Plan 

(g) Printing requirements for refrigerating appliances energy labels 

The above terms have been defined in Annexure I – Section 1 (DEFINITIONS) of this 

schedule. 

2. Schedule of tests 

2.1 Method of tests 

The testing code and procedure for Frost Free (No-Frost) Refrigerator would be as per IS 

15750 : 2000. 

2.2 Parameters to be tested 

2.2.1 Energy Consumption 

The Energy Consumption of the Frost-Free (No-Frost) refrigerator will be tested as per IS 

15750: 2000. 

2.2.2 Rated Volume (Storage and Gross)

Each compartment gross and storage volume of the appliance shall meet the requirements set 

out in IS 15750: 2000. 

 
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2.3 Test Report 

The results of tests shall be reported as per IS 15750: 2000 with the relevant sections from the 

mentioned appendix applicable and will clearly mention the gross volume and the storage 

volume. 

3. Tolerance Limit 

The tolerance limit for the volume (storage & gross), pull-down, and operating temperature 

performance shall be as defined in IS 15750: 2000. 

4. Conditions of Compliance 

The conditions of compliance shall be as specified in IS 15750: 2000. 

5. Rating Plan 

Rating plan will be as per Annexure I – Section 2 (CALCULATIONS FOR THE ENERGY 

LABEL) of this schedule. 

6. Sampling 

The samples will be picked up by Bureau of Energy Efficiency (BEE) or its designated 

agency for testing as per the following sampling plan: 

a) One sample will be picked up at random from the manufacturing facility or 

warehouse. 

b) One sample will be picked from a retail outlet. 

7. Qualification 

a) Pull Down Test 

The appliance shall meet the requirements set out in IS 15750: 2000. 

b) Operating Temperature Performance Test 

Operating Temperature Performance Test as defined in IS 15750: 2000 shall be required 

only if consideration for special compartment(s) is taken in calculating adjusted volume. 

While all units within a model are required to meet the Pull-down test (and Operating 

Temperature Performance test as applicable), a test report for a single unit is required to 

confirm this for the purposes of energy labeling. 

8. Label Design, manner of display 

The label design and manner of display will be as per Annexure I - Section 3 (LABEL 

DESIGN AND MANNER OF DISPLAY) of this schedule. 
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9. Fees 

a) Registration fee is payable on application for assignment of authority is 

 Rs. 1000/- (One thousand only).

b) Registration fee is payable on application for renewal of authority to affix labels is 

 Rs. 500/- (Five hundred only).

c) Labeling fee for affixation of label on each piece of Frost Free (No-Frost) refrigerator 

is Rs. 10/- (Ten only).
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Annexure – I to Schedule 1

SECTION 1 

DEFINITIONS 

1 Definitions 

For the purposes of this schedule, the definition given in IS 15750: 2000 and those below 

apply. The definitions below take preference over the ones in the above mentioned standards. 

1.1 Frost Free (No-Frost) Appliance 

A household refrigerator appliance in which all frozen food storage space is cooled by a frostfree system. Unfrozen food storage space may or may not be cooled by a frost-free system but 

all storage spaces in the appliance whether frozen or unfrozen are automatically defrosted 

with automatic disposal of water. 

In a frost-free system: 

a. Cooling is provided by forced air circulation. 

b. The system is automatically operated to prevent permanent formation of frost on all 

refrigerated surfaces and 

c. No accumulation of ice or frost forms on stored food. 

1.2 Projected Annual Energy Consumption (PAEC) 

The estimated energy used by a single unit during one year’s use. This is calculated from 

Tested Energy Consumption (Et) (refer 2.1.1 of this Annexure). (Units: kWh/Year)

1.3 Tested Energy Consumption (Et) 

The value of energy consumption as determined by IS 15750: 2000. This is calculated for a 

period of 24 hours. (Units: Wh) 

1.4 Comparative Energy Consumption (CEC) 

The nominal energy consumption of a model of refrigerating appliance. It is based on the 

PAECav of the model (refer 2.2 of this Annexure). The CEC appears on the energy label. 

(Units: kWh/Year) 

 
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1.5 Total Adjusted Storage Volume for No Frost (Vadj_tot_nf) 

The rated storage volume of a compartment adjusted to compensate for heat loadings on 

spaces which are at temperature other than that of fresh food type space. 

NOTE: The adjusted volume shall be calculated on the basis of the STORAGE VOLUME of 

each compartment. 

1.6 Star Rating 

The number of stars displayed on the energy label. The available stars are between a 

minimum of one and a maximum of five shown in one star interval. The star rating is 

calculated from the Star Rating Band (refer 2.5 of this Annexure) The Star Rating 

determination will vary for different models based on the storage volume. (No units) 

1.7 Star Rating Band 

The Star Rating Band is a range of energy efficiency (kWh/Year) which is arrived by 

calculations (refer 2.5 of this annexure), and is used for determining the number of stars 

displayed on the energy label. 

1.8 Family of models 

Family of models is the range of models of one particular brand, to which a single set of test 

reports is applicable and where each of the models has the same relevant physical 

characteristics, comparative energy consumption, and energy efficiency rating and 

performance characteristics. The term ‘model’ is synonymous with ‘family of models’. 

1.9 Variant 

A model variant is an alternative version of a model which has the same sales specification 

and the same model number or other form of designation as another version of the model, and 

offers the same performance except that it has a different PAEC and may have a different Star 

Rating. 
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SECTION 2 

CALCULATIONS FOR THE ENERGY LABEL 

2.1 GENERAL 

This Section sets out the equations and procedures for calculating values of Projected Annual 

Energy Consumption (PAEC) & Comparative Energy Consumption (CEC) and the Star 

Rating which appear on the energy label. 

2.1.1 Projected Annual Energy Consumption (PAEC) 

The process consists of measuring the tested energy consumption (Et) (Appendix K of 

AS/NZS 4471.1:1997), of each unit tested, then calculating the projected annual energy 

consumption (PAEC) of the unit. 

PAEC = Et

 * (365/1000) (kWh/Year) 

Et

 = tested energy consumption expressed in Wh per 24 hours, rounded to the nearest 

whole number. 

2.2 NUMBER OF TEST AND PROCESSING OF DATA 

2.2.1 Number of units required 

For the purpose of determining the CEC of a model for labeling, three separate units of the 

nominated model shall be tested for energy consumption in accordance with Section 2 of IS 

15750 : 2000. 

2.2.2 Number of tests per unit 

Each unit shall be tested with sufficient test runs to enable a valid Et

 to be determined for that 

unit. This determination shall be documented in a test report containing the test result for all 

test runs used to derive Et

 (refer to IS 15750 : 2000). 

2.2.3 Results 

After testing three or more separate units the separate values of PAEC shall be averaged and 

referred to as PAECav. 
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2.2.4 Rounding 

Unless otherwise stated, number shall be rounded and recorded to five significant figures. The 

values of PAEC, PAECav, CEC, and Star Rating Band shall be rounded of (< 0.5 to lower 

whole number and ≥ 0.5 to higher whole number) to the nearest whole number. 

2.3 COMPARATIVE ENERGY CONSUMPTION 

2.3.1 General 

The CEC for a model shall not be less than the average (rounded to a whole integer) PAEC 

value (i.e. PAECav) for the three (or more) units which are tested to determine the label 

particulars. The CEC shall be an integer in units of kWh/Year. 

The CEC and Total Adjusted Storage Volume for No Frost (Vadj_tot_nf) shall be used to 

determine the Star Rating Band and Star Rating of the model.

2.3.2 Variant 

Two or more variants of a model may use a common label with a CEC not less than the 

highest PAECav (rounded to the nearest whole number) of those variants. 

2.4 TOTAL ADJUSTED STORAGE VOLUME FOR NO FROST (Vadj_tot_nf ) 

Fresh Food Chamber Target Temperature = +3 Degree Celsius 

Freezer Chamber Target Temperature = -15 Degree Celsius 

Adjusted Volume Factor = (Test room Temperature – Freezer Temperature) / 

(Test rom Temperature – Fresh Food Temperature) 

 = [32 - ( -15)] / [(32 - 3)] 

= 1.62 

Total Adjusted Volume for No Frost refrigerator (Vadj_tot_nf) 

= Fresh Food Storage Volume + 1.62 * Freezer Storage Volume

2.5 STAR RATING 

The star rating parameters knf (Constant Multiplier (kWh/Litre/Year)) & cnf (Constant 

Fixed Allowance (kWh/Year)) shall be obtained from TABLE 2.1 / 2.2 / 2.3, depending on 

the year of manufacturing/import/assembling 

S. No. Product Manufactured/Imported/Assembled Table to be used 

1. From 07 January 2010 to 31 December 2011 2.1 

2. From 01 January 2012 to 31 December 2013 2.2 

3. From 01 January 2014 to 31 December 2015 2.3 
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The following equation shall be used to determine the Star Rating Bands for a particular 

model: 

Star Rating Band (SRB)nf = knf * Vadj_tot_nf + cnf

Where, 

knf = Constant Multiplier (kWh/Litre/Year) 

Vadj_tot_nf = Total Adjusted Storage Volume for No Frost (Litre) 

cnf = Constant Fixed Allowance (kWh/Year) 

TABLE 2.1: Star Rating Band valid from 07 January 2010 to 31 December 2011. 

Star Rating Band knf 

Constant Multiplier 

cnf 

Constant Fixed Allowance 

1 Star * 0.8716 759 

2 Star * * 0.6973 607 

3 Star * * * 0.5578 486 

4 Star * * * * 0.4463 389 

5 Star * * * * * 0.3570 311 

TABLE 2.2: Star Rating Band valid from 01 January 2012 to 31 December 2013. 

Star Rating Band

knf 

Constant Multiplier 

cnf 

Constant Fixed Allowance 

1 Star * 0.5578 486 

2 Star * * 0.4463 389 

3 Star * * * 0.3570 311 

4 Star * * * * 0.2856 249 

5 Star * * * * * 0.2285 199 

TABLE 2.3: Star Rating Band valid from 01 January 2014 to 31 December 2015. 

Star Rating Band

knf

Constant Multiplier 

cnf 

Constant Fixed Allowance 

1 Star * 0.4463 389 

2 Star * * 0.3570 311 

3 Star * * * 0.2856 249 

4 Star * * * * 0.2285 199 

5 Star * * * * * 0.1828 159 
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The above equation provides for the value of the various Star Rating Bands for a particular 

model. The CEC of the model as determined from 2.3.1 will be compared with the various 

Star Rating Bands. The Star Rating chosen for the model will be based on the above 

comparison. CEC will be compared to the lower and the upper limits of each Star Rating 

Band. The Star Rating corresponding to the band whose lower rating is less than CEC and 

upper limit is greater than or equal to CEC will be assigned to the model. 

 Lower Limit of SRB < CEC ≤ Upper Limit of SRB

There is no tolerance for the Star Rating Bands. All tested products must meet the minimum 

threshold for each Star Rating Band. The scope for manufacturing tolerance and other 

variations shall be accounted for when determining the Star Rating. 

2.6 ENERGY LABEL VALIDITY 

The CEC value shall be accepted as valid if, when a single sample of a labeled model is 

tested for an initial screening test and its PAEC is such that: 

 PAEC < 1.1 * CEC 

If this is not the case, the CEC shall be accepted as valid if three additional units are tested 

and the average PAEC of these additional units is such that: 

 PAEC(av) < 1.1 * CEC 

Additionally the PAEC shall be less than the upper limit of the corresponding Star Rating 

Band of the Star Rating of a single model tested or if two additional units are tested then 

PAEC of two out of three and PAECav should be less than then upper limit of the 

corresponding Star Rating Band. 
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SECTION 3 

LABEL DESIGN AND MANNER OF DISPLAY 

3.1 PLACEMENT 

The energy label shall be adhered to the upper portion of each appliance on the outside of the 

door. 

3.2 MATERIAL AND SHAPE 

The label shall be self –adhesive and shall be designed as set out in Figure 3.1. 

However, in the case of a stainless steel or other finishes that may be permanently marked or 

stained by the adherence of a label, the use of a double sided swing tag or single sided nonrotating swing tag is permitted. 

3.3 COLOURS 

The label shall be printed as per the following specification in the following colours on a 

white background (see Figure 3.2): 

Red: Pantone warm red 

Yellow: Pantone 116 

Black: Pantone Black 

Green: Pantone 340 

3.4 SAMPLE LABEL 

An example of a printed energy label for a refrigerating appliance is shown in Figure 3.3. 

The label will mention the following: 

1. Appliance: Refrigerator 

2. Energy Consumption per Year (CEC) 

3. Model Name/Number, Year of Manufacturing 

4. Brand 

5. Type 

6. Gross Volume 

7. Storage Volume 
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 Figure 3.1: Design Scheme for the Label (Sample).
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Figure 3.2: Colour Scheme for the Label (Sample). 
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 Figure 3.3: Sample Label 
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Sample Picture of manner of affixing of Label: