Whole of Home is an incorporation of a NatHERS rating and will measure the energy use of the whole home including appliances, solar and batteries.
Adding to the current NatHERS star rating assessment out of ten, the Whole of Home Performance Rating will be a separate rating out of 100.
The new assessment builds on the thermal performance assessment by providing information about the energy use of the following appliances:
- Heating and cooling
- Hot water systems
- Lighting
- Pool/spa pumps
- Cooking and plug-in appliances
- On-site energy generation and storage.
New NatHERS certificates have been developed to include Whole of Home ratings and to support the NCC 2022 energy efficiency provisions. If you are thinking “but we already have this as BASIX” you are correct.
While the NatHERS software packages have been updated for whole-of-home energy, they cannot be used for energy rating in NSW and we must continue to use BASIX for assessment.
So I if you hear about “Whole of Home” and find the NatHERS Certificates look a little different or assessors are asking for more than usual details – You have the “heads up”!
