New heating & cooling loads were introduced this year for Class 1, 2 & 4 buildings to meet in addition to the star rating requirement for the NatHERS pathway.
These new requirements are not compulsory for all 69 NatHERS climate zones.
This is because some climates are dominated by hot or cold weather, such as the climate zones in the Northern Territory (NT), Tasmania (Tas) and some climates zones in Queensland (Qld) and Western Australia (WA). New South Wales (NSW) already has separate heating and cooling load limits (or “caps”) covered in its Building Sustainability Index (BASIX) Thermal Comfort requirements. Hence, heating and cooling load limits do not apply in NSW, NT, Tas and parts of Qld and WA.
Our findings from assessing hunderd's of homes over the last year, is if there is too much glazing to a dwelling, lower SHGC windows require to be used if no external shade exists.
To find out more about the heating & cooling load requirement click here