TIPS for a 6 star rating and an optimized house thermal performance
When a house, as currently designed doesn’t meet the minimum 6 star rating or some thermal measures are too expensive to install/construct, there are quite a few solutions to improve the energy efficiency cost-effectively.
National Construction Code (NCC) recognizes 8 climate zones in Australia. These climate zones vary from hot humid climate (Zone 1) to Alpine areas cold climate (zone 8). Some of the following strategies apply to all climates and there are also some climate-specific strategies.
Each house might perform differently depending on its climate and micro-climate zone, neighbouring building and shading from adjacent objects. It is highly recommended to get your energy assessor involved from the early stages so that they can work with your architect to quantify the impact of different measures on the overall house heating and cooling performance.
Common strategies for all climates
- Insulate ceilings and walls.
- Use appropriate shading for glazing.
- Minimize west and east-facing glazing or use adjustable shading devices to adjust the level of heat gains from the sun.
- Weather seal all external windows and doors.
- Use appropriate openings (windows and doors) for cross ventilation and passive cooling.
There are unlimited climate and micro-climate strategies that require different energy measures. Here, we classify it into two major strategies.