Part J1 Energy efficiency performance requirements

(1) For a Class 3, 5, 6, 7, 8 or 9 building or common area of a Class 2 building, compliance with J1P1 is verified when—

1. it is determined that the annual greenhouse gas emissions of the proposed building are not more than the annual greenhouse gas emissions of a reference building when—

   1. the proposed building is modelled with the proposed services; and

   2. the proposed building is modelled with the same services as the reference building; and

2. in the proposed building, a thermal comfort level of between a Predicted Mean Vote of -1 to +1 is achieved across not less than 95% of the floor area of all occupied zones for not less than 98% of the annual hours of operation of the building; and

3. the building complies with the additional requirements in Specification 33.

(3) The calculation method used for (1) and (2) must comply with—

1. ANSI/ASHRAE Standard 140; and

2. Specification 34.

J1V4Verification of building envelope sealing2019: JV4

(1) Compliance with J1P1(e) and J1P2 is verified for building envelope sealing when the envelope is sealed at an air permeability rate, tested in accordance with Method 1 of AS/NZS ISO 9972, of not more than—

1. for a Class 2 building or a Class 4 part of a building, 10 m³/hr.m² at 50 Pa reference pressure; or

2. for a Class 5, 6, 8 or 9a or 9b building, other than a ward area, in climate zones 1, 7 and 8, 5 m³/hr.m² at 50 Pa reference pressure; or

3. for a Class 3 or 9c building, or a Class 9a ward area in climate zones 1, 3, 4, 6, 7 and 8, 5 m³/hr.m² at 50 Pa reference pressure.

(2) In a sole-occupancy unit of a Class 2 building or a Class 4 part of a building, where an air permeability rate of not more than 5 m3/hr.m2 at 50 Pa reference pressure is achieved—

1. a mechanical ventilation system must be provided that—

   1. can be manually overridden; and

   2. provides outdoor air, either—

      1. continuously; or

      2. intermittently, where the system has controls that enable operation for not less than 25 per cent of each 4 hour segment; and

   3. provides a flow rate not less than that achieved with the following formula:

      Q=(0.05×A+3.5×(N+1))/pMathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyuaiabg2 da9iaacIcacaaIWaGaaiOlaiaaicdacaaI1aaccaGae831aqRaamyq aiabgUcaRiaaiodacaGGUaGaaGynaiab=Dna0kaacIcacaWGobGaey 4kaSIaaGymaiaacMcacaGGPaGaai4laiaadchaaaa@497F@

      , where—

      1. QMathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyuaaaa@36CA@

         = the required air flow rate (L/s); and

      2. AMathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyqaaaa@36BA@

         = the total area of the sole-occupancy unit of a Class 2 or Class 4 part of a building (m2); and

      3. NMathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOtaaaa@36C7@

         = the number of bedrooms in the sole-occupancy unit of a Class 2 or Class 4 part of a building; and

      4. pMathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiCaaaa@36E9@

         = the fraction of time within each 4 hour segment that the system is operational; and

2. any space with a solid-fuel burning combustion appliance must be ventilated with permanent openings directly to outside with a free area of not less than half of the cross-sectional area of the appliance’s flue; and

3. any space with a gas-fueled combustion appliance must be ventilated in accordance with—

   1. clause 6.4 of AS/NZS 5601.1; and

   2. clause 6.4.5 of AS/NZS 5601.1.

(3) For the purposes of (2)(c), the volume of the space is considered to be 1 m3 for determining ventilation requirements.

J1V5Verification using a reference building for a Class 2 sole-occupancy unitNew for 2022

NCC Title

Verification using a reference building for a Class 2 sole-occupancy unit

NCC Variation Type

Deletion

NCC SPTC Current

Verification using a reference building for a Class 2 sole-occupancy unit

NCC Notice

J1V5 does not apply in NSW.

(1) Compliance with J1P2 is verified when each Class 2 sole-occupancy unit of a proposed building—

1. in climate zones 3, 4, 5, 6, 7 and 8, has a heating load less than or equal to—

   1. that of a reference building; and

   2. 120% of J1P2(1); and

2. in climate zones 1, 2, 3, 4 and 5, has a cooling load less than or equal to—

   1. that of a reference building; and

   2. 120% of J1P2(2); and

3. complies with the additional requirements in Specifications 33 and 45 as applicable.

(2) Compliance with J1P3 is determined when the energy value of the domestic services, including all centralised domestic services infrastructure, of a proposed building is less than that of a reference building when—

1. each sole-occupancy unit of a reference building has—

   1. a 3-star ducted air-to-air heat pump, rated under the 2019 GEMS determination, heating all spaces that are provided with heating; and

   2. a 3-star ducted heat pump, rated under the 2019 GEMS determination, cooling all spaces that are provided with cooling; and

   3. a 5-star instantaneous gas water heater, rated under the 2017 GEMS determination, providing all domestic heated water; and

   4. a lighting power density of 4 W/m2 serving all internal spaces that are provided with artificial lighting; and

2. the proposed building and a reference building comply with the additional requirements in Specifications 33 and 45 as applicable.