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Checklist A5

See Ene 01 Reduction of energy use and carbon emissions.

Table 68Ene 01 Energy efficient features checklist

Ref

Option 2 – Energy efficient features

criteria requirements and guidance

Residential credits

Non-residential

credits

ITEMS APPROPRIATE FOR ALL ASSESSMENTS

 Lighting up to 3up to 2
1Internal daylit and non-daylit areas have switching controls that take account of absence or occupancy, or daylighting as recommended by ASHRAE Standard 90.1 and the California Energy Code.Not applicable to building type1
Note

Adequate lighting controls must also be provided to all ancillary areas (as applicable) such as:

  1. Store rooms and cold stores
  2. Plant and control rooms
  3. Toilet, washroom and shower areas
  4. Circulation areas, corridors and stairwells.
2Where at least 80% of general internal luminaires in fixed fittings achieve an efficacy of at least 65 luminaire lumens/Watt or greater.1
NoteGeneral internal lighting refers to all internal light fittings, but excludes those used for emergency purposes. The assessor should note that the benchmark is for individual fittings, not the average lumens per circuit watt.-
3

In order to award the residential lighting credits:

  1. An information leaflet explaining efficacy in terms of lighting and the benefits of purchasing high efficacy Low Energy Lamps (LELs) must be provided in each dwelling.
Prerequisite Not applicable to building type
475% of the fixed internal fittings as a percentage of the total number of fixed light fittings within habitable rooms have been fitted with LELs.

Single dwellings 2

Multiple dwellings 1

5100% of the fixed internal fittings as a percentage of the total number of fixed light fittings within habitable rooms have been fitted with LELs.

Single dwellings 3

Multiple dwellings 2

Note

Habitable rooms are defined as follows:

  1. Living rooms or dining rooms
  2. Kitchen or utility rooms
  3. Bedrooms
  4. Hallways
  5. Studies
  6. Offices
  7. Play rooms, games rooms or leisure rooms
  8. Bathrooms
  9. WCs.
-
6

All internal space lighting in the communal areas, excluding statutory safety lighting, has fixed fittings fitted with:

  1. LELs
  2. Movement detecting control devices (PIR)
  3. Daylight cut-off sensors OR timers.

Single dwellings N/A

Multiple dwellings 1

NoteFor residential lighting criteria, LELs are deemed as bulbs that have a luminous efficacy greater than 50 lumens per circuit watt and 40 lumens per circuit watt for LEDs.-
 
 Water heat generator efficiency11
7Hot water is supplied via a self-contained system that has an efficiency of ≥ 85% (either central or decentralised) OR where decentralised gas fired storage heaters are specified that have an efficiency of ≥ 85%.11
NoteThe water heating system is designed in accordance with the recommendations of ASHRAE Standard 90.1 and the controls specified are in compliance with the guidance for hot water systems. Where the building is not heated this credit is not available. --
 
 Low and zero carbon technologiesup to 2up to 2
8At least 10% of the total electricity or heating and cooling demand is generated on site from low or zero carbon technologies.11
9At least 20% of the total electricity or heating and cooling demand is generated on site from low or zero carbon technologies.22
NoteThe low and zero carbon technologies as listed in BREEAM issue Ene 04 Low carbon design can be used to demonstrate compliance. Other systems may be acceptable as part of a LZCLow or zero carbon strategy under this issue but are not inherently considered as LZC technologies. Acceptability will be dependent on the nature of the system proposed. The BREEAM Assessor must confirm acceptability with BRE if in doubt.--
 
BUILDING SERVICES ENGINEER MUST CONFIRM ITEMS ARE APPROPRIATE FOR THE ASSESSMENT
Building fabric55
105% improvement on the U-value requirements in ASHRAE Energy Standard 90.1-2013 (for all buildings except low rise residential buildings) or ASHRAE Energy Standard 90.2-2007 (for low rise residential buildings).11
1110% improvement on the U-value requirements in ASHRAE Energy Standard 90.1-2013 or 90.2-2007 (as applicable).22
1215% improvement on the U-value requirements in ASHRAE Standard 90.1-2013 or 90.2-2007 (as applicable).33
13Pressure test shows air permeability ≤ 50% of leakage value of current national standards. If national standards are not available, 5m³/h/m²@ 50Pa should be taken as the maximum value for air permeability to achieve the credit.11
14Pressure test shows air permeability ≤ 75% of leakage value of current national standards. If national standards are not available, 2.5m³/h/m²@ 50Pa should be taken as the maximum value for air permeability to achieve the credits.22
 
 Space heat generator efficiency11
15

The seasonal efficiency of the source of space heating is ≥ 90%. The system must also comply with ALL of the following:

  1. The heating system is to be designed in accordance with the recommendations of ASHRAE Standard 90.1
  2. At least 75% of the heat demand must be sourced by the heating system with the highest efficiency; the remaining top-up heat must be supplied by a high efficiency heating source ≥ 80%
  3. Where the heating system is comprised of an arrangement of multiple boilers or heat sources, the seasonal efficiency of the multiple boiler system must be ≥ 85%
  4. Where low-temperature systems are specified, 100% of the heat must be sourced from a condensing boiler
  5. The overall system efficiency, i.e. the distribution and seasonal boiler efficiency, is ≥ 70%
  6. The heating system controls must be in compliance with ASHRAE Standard 90.1
  7. A form of variable flow control is fitted, i.e. variable speed pumps.

Where CHPCombined heat and power is specified the credit can be awarded provided that:

  1. The CHP operates as the lead boiler
  2. Remaining output is provided by condensing boilers with an efficiency of ≥ 85%
  3. Boost output is provided by high efficiency boilers ≥ 80%
  4. The CHP plant must have an efficiency of ≥ 85%
  5. The system controls comply with the requirements outlined above.
11
Note
  1. In order to determine the seasonal efficiency of the boiler used for space heating the link below provides a list of boilers and their associated efficiencies. If the boiler used in the assessment is not on this list, the closest match can be used to demonstrate compliance: http://www.sedbuk.com/
  2. Where electric heating is specified it must demonstrate the same efficiency to achieve the credit, i.e. that it accounts for distribution losses from the energy network when determining efficiency. Where the electricity is sourced in part or full from alternative renewable or low carbon sources then the efficiency of the system will need to be calculated according to the ratio of electricity demand sourced from each supply.
  3. Where demand is partly met by on site renewable or low carbon forms of heating (e.g. heat pumps or solar hot water), then that system’s output should be counted towards the overall system output for calculating system efficiency.
  4. Where the building is not heated this credit is not available.
--
 
 Cooling and ventilation up to 2up to 4
16

In order to award the cooling system credits:

  1. Criteria1-4 in Hea 04 Thermal comfort must be achieved.
  2. Air-conditioning systems specified must have:
    1. A form of variable flow control fitted, i.e. variable speed drives
    2. Controls to prevent simultaneous heating and cooling
    3. Temperature and humidity (where applicable) set points selected for minimum energy consumption consistent with comfort conditions.
Prerequisite
17

Where the design incorporates a system of providing low carbon cooling to completely displace the need for a mechanical cooling system

OR

The cooling system has a Coefficient of Performance (COP) of > 4.5.

11
Note

Compliance with this credit will be shown if the design has used a low carbon cooling technology, such as, but not exclusively limited to:

  1. Night-time cooling, i.e. requires fabric to have a high thermal mass
  2. Ground coupled air cooling
  3. Displacement ventilation (not linked to any active cooling system)
  4. Ground water cooling
  5. Surface water cooling
  6. Evaporative cooling, direct or indirect
  7. Passive house (Passivhaus) cooling strategies
  8. Desiccant dehumidification and evaporative cooling, using waste heat
  9. Absorption cooling, using waste heat
  10. The building does not require any form of cooling, i.e. it is naturally ventilated.

The assessment of this credit excludes specialist cooling systems (such as server rooms, cold food storage etc.). The assessor should confirm with BRE which specialist cooling systems may be excluded from the assessment of this credit.

--
18

All ductwork and air handling units (AHUs) are certified to meet the best leakage standards

OR

No mechanical ventilation (apart from where required as part of national building regulations; such systems should also comply with the leakage standards below).

Not applicable to building type 1
NoteExamples of best practice standards are ductwork tested to EN 13779: 2007 [5] class B and AHUs tested to EN 1886 2007 [6] class L1 or ASHRAE Standard 62.1 – 2010 Ventilation for acceptable indoor air quality and ASHRAE-90.1-2007 Energy standard for buildings.

19

Where the specific fan power for the mechanical ventilation system specified is:

  1. ≤ 0.6W/litre/second for continuous extract ventilation systems
  2. ≤ 1.0W/litre/second for whole house MVHR when running at each of its settings AND achieves a heat recovery efficiency of at least 85%

OR

No mechanical ventilation (apart from where required as part of national building regulations; such systems should also comply with the specific fan power level above).

1Not applicable to building type
NoteWhere the mechanical ventilation systems specified for the residential building are complex and more akin to the systems specified in Ref 20, the Ref 20 criteria should be applied to the assessment. 

20

Where the specific fan power for the mechanical ventilation system specified is:

  1. ≤ 1.6W/litre/second for central mechanical ventilation systems including heating only
  2. ≤ 1.8W/litre/second for central mechanical ventilation systems including heating and cooling

AND

The system:

  1. Has a form of variable flow control fitted, i.e. variable speed drives
  2. Can be controlled in accordance with the recommendations of ASHRAE Standard 90.1

OR

No mechanical ventilation (apart from where required as part of national building regulations; such systems should also comply with the specific fan power level above).

Not applicable to building type1
NoteWhere the mechanical ventilation systems specified for the non-residential building are simple and more akin to the systems specified in Ref 19, the Ref 19 criteria should be applied to the assessment.-
21

Where a method of heat recovery is integrated into the design of the mechanical ventilation system

AND:

  1. Achieves a heat recovery efficiency of at least 75%
  2. Has a form of variable flow control fitted, i.e. variable speed drives
  3. Can be controlled in accordance with the recommendations of ASHRAE Standard 90.1.

Where the building is naturally ventilated this credit is not available.

1
Total number of credits achieved: (Please note, a maximum of 10 credits may be awarded.) /10/10

BREEAM International New Construction 2016
Reference: SD233 – Issue: 2.0
Date: 03/07/2017
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