What are the latest NatHERS energy efficiency rating requirements for new residential builds in Tasmania?

For new residential builds in Tasmania, the latest NatHERS energy efficiency rating requirements, effective from 1 May 2024, mandate a minimum 7-star energy rating. This uplift from the previous 6-star requirement aligns with the National Construction Code (NCC) 2022 amendments, specifically through an NCC 2022 out-of-cycle amendment. This change aims to improve thermal performance, reducing energy consumption for heating and cooling. Additionally, a new 'whole-of-home' energy usage target has been introduced, requiring an assessment of the dwelling's total energy use, including major fixed appliances like hot water systems and lighting, to further optimise overall energy efficiency and minimise operational costs for homeowners.