Blower door testing is a valuable diagnostic tool for improving the energy efficiency of homes across Australia. The test measures the airtightness of a building, which indicates how much air is leaking into or out of the structure. By identifying these leaks, the homeowner or building professional can implement the necessary improvements to reduce air infiltration. This not only helps to lower energy costs but also enhances the overall comfort and performance of the home.

1. Identify Air Leaks

The blower door test can pinpoint air leaks in the building envelope, including common areas such as doors, windows, ceiling penetrations, and wall joints. This precise information enables targeted air sealing and insulation upgrades, which significantly improve the building’s energy efficiency.

2. Improve Indoor Air Quality

Uncontrolled air infiltration allows outdoor pollutants—including dust, pollen, smoke, and moisture—to enter the home. Over time, this can negatively impact respiratory health and interior surfaces. By identifying and sealing leaks, blower door testing contributes to a healthier and more controlled indoor environment.

3. Reduce Energy Costs

By minimising unwanted air movement, heating and cooling systems operate more efficiently, reducing strain and energy usage. This translates into lower utility bills and long-term cost savings, especially in climates with extreme temperature variations.

4. Increase Comfort

Draughts and uneven temperatures are common in homes with poor airtightness. Sealing leaks helps maintain a consistent indoor temperature and eliminates cold or hot spots, thereby enhancing thermal comfort and liveability.

5. Evaluate Overall Building Performance

Blower door testing serves as a benchmark for evaluating the effectiveness of insulation, window sealing, and ventilation systems. It is often used during new construction, refurbishments, or energy audits to validate that energy-saving measures are working as intended.

Why Blower Door Testing Matters in Australia

Australia’s building standards increasingly emphasise energy efficiency, and blower door testing supports compliance with sustainability goals under frameworks such as the National Construction Code (NCC) and NatHERS ratings. Whether you’re upgrading an older property or certifying a new build, blower door testing is a key step towards meeting energy performance targets.

Ready to book a blower door test at your home?

Our trusted partner Aerotight is Canberra’s leading provider of blower door testing services. Contact them today to schedule a professional assessment and start improving your home’s energy performance.