# Energy 1.2 Thermal Performance Rating - Residential
# Applies to
All residential developments
# Objective
To reduce energy needed to achieve thermal comfort in summer and winter - improving comfort, reducing greenhouse gas emissions, energy consumption, and maintenance costs.
# Summary
Points are awarded when the average Nationwide House Energy Rating Scheme (NatHERS) rating is above 7 stars. More points are awarded for each improvement in the average NatHERS rating, with a 50% score awarded for 7.5 stars, and maximum score awarded for projects achieving 8.5 stars or higher.
The average NatHERS rating is calculated as a weighted average relative to the size of each dwelling. For example:
- Dwelling 1 = 100sqm, 7 star NatHERS
- Dwelling 2 = 150sqm, 8 star NatHERS
Average NatHERS rating = ((100*7)+(150*8)) / (100+150) = 7.6 star
# Documentation & evidence required
- Preliminary NatHERS ratings - Enter NatHERS Annual Energy Loads for Heating and cooling (MJ/sqm), as well as the NatHERS star rating into the Dwelling Energy Profiles table in the BESS Energy section. For developments that include dwellings intending to meet minimum NatHERS requirements only, and have not undertaken preliminary NatHERS, the user must enter default minimum 7 Star NatHERS heating and cooling loads for the relevant climate zone. Refer to table above.
- If you have selected to provide your own calculations (i.e. you are not using the built-in calculator), input the area weighted average NatHERS star rating directly into the credit.