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Blower Door Testing

At Climasure, the combination of our air tightness consultancy and blower door testing service ensures your building can meet the highest standards of airtightness and energy efficiency. We will work with you to determine your goals and assist you to reach them.
A blower door test identifies hidden air leaks that drive up energy bills and compromise comfort. By detecting and addressing these leaks, we help you optimise building performance, enhance indoor air quality, and reduce long-term maintenance costs. Whether you're constructing a new home or improving an existing one, blower door testing with Climasure ensures a healthier, more energy-efficient living environment tailored to your needs.
Blower Door Testing for Airtightness
Blower door testing is a crucial method to measure a building's airtightness by using a powerful fan to depressurize the structure.
It identifies leaks that allow air to escape or enter, leading to energy loss and poor indoor comfort. Fixing these leaks can drastically improve energy efficiency, lower utility costs, and contribute to a healthier indoor environment.

Improving Building Performance with Blower Door Testing
This testing method helps builders, architects, and homeowners ensure their structures meet client expectations by detecting and quantifying air leakage.
It provides a measurable way to assess and improve building sealing, leading to reduced energy costs, better temperature regulation, and increased durability of the building envelope.
Blower Door Testing for Energy Efficiency
Blower door testing plays a vital role in ensuring energy-efficient homes by measuring the extent of air leakage in a building.
It helps identify weak spots in the building envelope, providing actionable insights to improve sealing, insulation, and ventilation systems, ultimately leading to lower energy bills and enhanced living comfort.
Blower door testing helps builders identify and fix air leaks during construction.
It confirms that the building envelope is sealed properly, reducing energy loss, enhancing indoor air quality, and avoiding expensive future repairs.
Blower door testing quantifies airtightness, which directly impacts a building’s energy performance, indoor air quality, and durability. Architects use it to validate designs and reduce future risks related to moisture, mould, and thermal comfort, ensuring that the building meets modern efficiency standards.
An air tightness schematic is highly recommended during the design phase to identify your air barrier. This is an extremely effective communication tool between yourself and the construction team.
Blower door testing reveals hidden air leaks in a home, helping reduce energy bills, improve indoor comfort, and prevent drafts.
This test improves energy-efficiency and building health, providing a long-term investment in air quality and comfort.
FAQs
What is a blower door test?
A blower door test is a diagnostic tool used to measure the air tightness of a building by identifying air leakage points. It helps assess how much conditioned air is escaping and how much unconditioned air is entering the building.
Why is air tightness important in buildings?
Air tightness is crucial for energy efficiency, comfort, indoor air quality, and maintaining the durability of a building by controlling moisture entry.
How is a blower door test performed?
A fan is mounted in a door opening to depressurize the building. The pressure difference between inside and outside is measured, along with the air leakage rate.
What does the test result indicate?
The test result, typically expressed as Air Changes per Hour (ACH) at a certain pressure (usually 50 Pascals, ACH50), indicates how many times the air inside the building is replaced with outside air in one hour under test conditions.
The result of an air tightness test can also be expressed as m3/h/m2 which describes the volume of air (in cubic meters) that leaks through the building envelope per hour, per square meter of the building's surface area (such as walls, roof, and floor).
What is a good ACH50 result?
For energy-efficient homes, an ACH50 below 3 is common. Passivhaus standards require an ACH50 of 0.6 or less. The Australian Average is currently 6.86m3/h/m2 (CSIRO, 2024)
What can be done if the test reveals significant air leakage?
Areas with high leakage, such as around windows, doors, and electrical outlets, can be sealed using silicone, expanding foam, weather stripping, or specialised tapes and membranes.
Would you like a free blower door testing quote?
Book a Blower Door Test with us!
Ensure your building meets your airtightness goals or just find out how air tight your building actually is so you know how to approach your ventilation strategy! We provide accurate air tightness testing to help you achieve energy efficiency and thermal comfort. Whether you’re aiming for your own personal target or striving for Passivhaus levels, we can help.