| Clarification Type |
Tool Version |
Month Released |
Credit Name |
Tool Category |
Amendment/Approved Ruling |
| General |
V4.1
|
October |
|
EHC
|
NZGBC clarifies the explicit exclusion of glass sliding doors in the 5% of openable window area in both EHC-1 and EHC-3 due to security, sound and weather concerns. Any window that makes up the 5% openable window area is required to be securable when open. Please note: Projects registered after the publish date of this TC are required to comply. Additional Comments: While it may be possible to secure a glass sliding door while slightly open, , NZGBC contends this is not a good design solution for either cooling or ventilation due to security, noise and safety concerns.
|
| General |
V4
|
October |
|
WAT
|
This TQ is APPROVED as the assessor personally witnessed these restrictors installed and the intention of the credit is met across the development.
|
|
V4.1
|
October |
|
EHC
|
NZGBC advises the selection of LPG gas flued for the EHC 2 calculation. This has the closest emission factor tothe chosen fuel ethanol with68kg CO2per MJ/m2.
|
|
V4
|
October |
|
EHC
|
Commercial and retail spaces adjacent to dwellings (in apartment blocks) can be considered as conditioned space if they are conditioned 24/7 as an adjacent home can be expected to be. If they are only conditioned during office hours (when residents are less likely to not be at home), these spaces should not be considered conditioned (treating intertenancy walls/floor as external walls or floors). However, if all external walls/floors etc. of the adjacent commercial/retail space is insulated to Homestar levels, you may also consider this space conditioned, even if not air conditioning is provided.
|
| General |
V4.1
|
October |
|
EHC
|
NZGBC can allow the use of PVsyst instead of BRANZ Calculator to determine kWh/annum produced. However, to calculate the emissions offset please input this figure into the Energy Calculator Tab. Also, provide details of analysis to NZGBC after incorporating this calculation into the project. Additionally, to validate the chosen software is more accurate than the BRANZ calculator. It is advisable to show comparative result between BRANZ Calculator and PVsyst.
|
|
V4.1
|
October |
|
EHC
|
“This TQ is accepted on the basis that the design team have confirmed that they have carried out due diligence on the risk of interstitial moisture. Under no circumstances must this TQ be construed as an NZGBC review or endorsement of the proposed design. Points are being awarded on the basis that the project’s design team have carried out their own review”.
|
|
V4
|
October |
|
EHC
|
You may cross reference of Perceived Sound Reduction (PSR) table with Sound Transmission Class (STC) values for the purposes of EHC-9.
|
|
V4
|
October |
|
STE
|
The TQ to achieve STE-2 points by planting on an adjacent unused site to the project is accepted, provided there is an agreement in place with the owner of the un-used land to maintain this as a planted area. This meets the credit intent by improving the native ecological value of sufficient amount of land area at the project owner's expense.
|
|
V4
|
October |
|
EHC
|
The TQ to have Passive House Plus certification accepted for full points for the renewable energy component in EHC-8 is awarded. Passive House Plus certification requires renewable energy generation to exceed the dwelling’s renewable primary energy demand. Passive House Certification is already accepted to verify points in EHC-1 and EHC-2 corresponding to performance benchmarks required for that certification. This TQ is awarded based on that precedence.
|
|
V5
|
October |
HC1 - Winter Comfort,
HC2 - Summer Comfort,
EN4 - Construction Waste Minimisation
|
|
For Volume assessments of homes achieving no higher than 7 Stars,it is acceptable to split the volume assessed homes into typologies that are representative of each of the 6 climate zones in the H1 Fifth edition. Energy modelling/ECCHO modelling should be carried out using either the ECCHO climate file representative of the climate zone in the table below or the corresponding NIWA EPW file at the altitude of the weather station in ECCHO or EPW file. As follows : Climate Zone- Representative Climate Data 1-Auckland 2-Napier 3-Wellington 4-Turangi 5-Christchurch 6-Queenstown The overheating risk matrix should be submitted with the volume assessment. This should make conservative assumptions about the neighbourhood, such as that the homes are being built in the ‘City’ (factor 2), have two barriers to opening windows (factor 3) and have no shading from surrounding buildings or foliage (factor 8). Factor 7 (bedroom window orientation) should take the worst case for submitted orientations. Less conservative assumptions may be made, however, they must be recorded on the volume assessment and be limiting factors on the applicability of the volume assessments, i.e. volume assessed homes that have been risk assessed for Rural and Urban environments may not be used for the City environments. Modellers may decide the prevailing wind direction for the purposes of overheating at their discretion. Also, default assumptions may be made for shading from surrounding buildings and foliage. In ECCHO this would be 80% for winter sun admitted and 90% for summer sun admitted. Account must be taken of self-shading from the building itself, i.e. from a wing of the home in an L-shaped house.
|
