ZEB family concept
International Standardization
November 6th, 2018

http://www.jase-w.org/english
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Contents
１、Background of ZEB Dissemination
２、Practical Approach to ZEB
３、What is ZEB family concept?
４、Standardization for ZEB family concept
５、Proposal at TC205/WG2
６、Current situation
７、Co-operation2

1. Background of ZEB dissemination❑ The current energy efficiency measures may notachieve COP21 requirements for reduction of global
warming gas easily in Japan.
❑ The current Japanese E. E. Law for buildings may
not achieve easily the target for reduction of GHG inbuilding sector. Therefore, the following new target
has been set in order to promote and disseminate
high level energy efficient buildings, “ZEB Ready”
though the continuous efforts to realize (net)ZEB
1. Realize ZEBs in newly constructed publicbuildings by 2020
2. Realize ZEBs in average newly constructedpublic and private buildings by 2030
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2. Practical Approach to ZEB
If you pursue only net Zero Energy Building at planningand design stage, there are many difficulties on financeand technologies in order to realize such Zero EnergyBuildings.
But once if you plan and design the building with theclear policy of ZEB Family concept , you canrealize ZEB by a step-by- step approach from ZEB
Ready .
ZEB Ready buildings can be designed, constructed
and operated by use of not only advanced technologies
but also other measures such as measurement,verification and management.
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3. ZEB family Concept
The concept of ZEB has been expanded to “ZEB family”
according to actual conditions. First step is to aim for super lowenergy buildings which are defined as “ZEB ready”, and then aimfor “ Nearly ZEB” and “(net) ZEB”.

ZEB Ready(Significant energy saving
more than 50% fromreference point )Nearly ZEB(net)ZEB(Net energy saving not reach 100% (Net energy saving of 100% or more)
But more than ZEB Ready)

IncludingRenewable energy
Airconditioning
Ventilation

Lighting
Hot water supply

Elevators

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3. ZEB family Concept
Definition and evaluation methods of ZEBs

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4. Standardization of ZEB family concept
We have decided that this step-by-step approach of“ZEB Family” concept should be disseminate as an
International Standard (ISO).
Now we have just proposed this step-by-step approachstandard to ISO TC205 WG2 (Design of energy-efficientbuildings) this September 27th at Oslo, Norway.
The proposal includes six core elements forstandardization of this “ZEB Family” concept.
This proposal shall be officially the theme as a newproposal of TC205 if more than 5 countries agree at theballot for this proposal. The ballot will be announced
soon. After announcement, the voting will start and end
within 3momths.
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4. Standardization of ZEB family concept
Six Core elements for Standardization (ISO)① At planning stage, to have clear policy to achieve ZEB by
the three steps, ZEB Ready → Nearly ZEB → (net)ZEB,
but not to achieve it by only one step to (Net) Zero Energy
Building.
② At the design stage, to select proper materials andequipment, which are certified by the domestic standard orinternational standard, as much as possible.
③ During construction, to install the selected materials andequipment correctly according to the drawings andspecifications.
④ After completion of building, to realize the energy
consumption targeted at the design stage.
⑤ After operation start, to inspect actual energy consumption
continuously (suitable times per year) whether there is any
difference of energy consumption between targeted at
design stage and measured at actual operation.
⑥ After design and after completion, to calculate the primaryenergy consumption by using simulation software, if possible.
8International Organization forStandardization• Proposed to TC205 WG2– TC205: Building environment design– WG2 : Design of energy efficient buildings• Members of TC205– Many countries from Europe, but no ASEANCountries as P-members who have the right tovote.

• One country has one vote right for decision
making ballot at ISO.

Need your cooperation
In order to proceed the standardization,
support from more than 5 countries are
required in the ballot among the P-members
among TC205.
• Be a P-member (Participating Member)instead of O-member (Observer Member)• Vote with us at ballot for ZEB family
standardization

Reflection to the evaluation guidelines ofthe special submission category of theASEAN Energy Award

Evaluation Point ofZEB Ready special submission
In addition to assessing the current building energy
performance itself, it should be evaluated by theperspective of on going efforts to achieve (net)ZEB
in the future as ZEB Ready・Is it cover core 6 elements of ZEB Family Concept ?
・Is future grade up plans are based concrete plans?
Therefore ZEB Ready Special Submission must be
different from the purpose of existing awards.

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Criteria of ZEB Ready in A.E.A
EnergyRenewa
bles

ZEB

EE&C

Green

Environment –Indoor/Outdoor
Water treatment
Service quality

Buildings

EE&C
Buildings

ZEB
ReadyThank you for yourattention.

1415• The intention of this standard is raising theawareness of the easy way to ZEB by step-bystep approach• It cover core 6 elements of “ZEB Family
Concept• The baseline can be decided by each countries
considering their current situation.

5. Case study(Example of a calculation for 1600
a 10,000 m2 office in Japan (7-story building)Equivalent to the 2013 Energy
Saving Standard

Envelope

Airconditioning

Ventilation

LightingHot
watersupplyElevator・Single layer 8 mm, etc.
・Roof insulation with 50-mm
extruded polystyrene foam・Wall insulation with 25-mm
extruded polystyrene foam・Air-cooled heat pump, EHP(electric heat pump)・Secondary pump that controls anumber of units and therevolving speed・Constant air volume control etc.
・Static pressure: 250 Pa・Fan efficiency: 40%
・Without control etc.
・HF-type appliances
・Without control etc.

・ Localized electric hot water
storage system
・ Without a hot water saving
device・ With 30-mm piping heatinsulation
・ AVAF (Adjustable Voltage
Adjustable Frequency)(without electric power
regeneration)

Equivalent to ZEB Ready1400• Low-E Double Glazing, full height,
with horizontal eaves• Roof insulation with 50-mm
extruded polystyrene foam
• Wall insulation with 25-mm
extruded polystyrene foam
• Air-cooled heat pump (controlling numberof compressors), EHP• Small-flow pump that controls a number ofunits and the revolving speed• VAV control, outdoor air cooling, double fan,
etc.

1200

1000

・Static pressure: 250 Pa・Fan efficiency: 40%
・High-efficiency motor, temperature control, etc.

800

600

・LED lighting
・Human sensor, daylight dimming control, etc.

400

・ Localized electric hot water
storage system
・ Automatic hot water supplying tap
・ With 30-mm piping heatinsulation

200• AVAF (Adjustable Voltage
Adjustable Frequency)
0121717