Airtightness Assessment of Commercial buildings
blower door test, fan door, air permeability, air pressure testing, thermal imaging, thermography, condition monitoring
Airtightness - Benefits of improving the building:
- HVAC Optimisation - By measuring building air leakage, identifying and then rectifying issues, you will reduce your; heating/cooling losses, system load, energy usage, and running costs.
- Identify contributors of heating, cooling and comfort issues which can be remedied to improve occupant comfort, potentially increasing productivity and staff wellbeing.
- Increase the value and attractiveness of the property/development to future investors.
- Gain insight into the level of quality to which your building has been built.
- Quantify how "leaky" your building is for comparison to benchmarks.
- Better building airtightness leads to better rejection of outdoor noise, and helps make the building "feel" better to be in.
- Increase the green credentials of the property by improving its energy conservation and reduced environmental impact.
- Potentially gain "Green Star' points from the Green Building Council of Australia.
The GBCA is leading the way in giving prominence to Building Airtightness as an essential element in achieving a Sustainable Built Environment.
Greenstar points are available for projects in relation to having an Airtightness test performed, and for achieving good results.
- Prior/during design to advise or offer direction in your approach to achieving an airtight building.
- Conduct an on-site briefing on how to build airtight with Builder and Site Manager who in turn can brief the trades people used.
- Inspection to check air sealing is being performed through the construction stages.
Airtightness/ Blower Door Test
- Gaps are often obscured by internal building finishes or external cladding. The only satisfactory way to verify that the building fabric is reasonably airtight is to measure the leakiness of the building fabric as a whole.
- We do this by performing a Fan Door (aka Blower door) air pressure test of the building. The fan creates pressure differentials between the internal and outside environment, and allows measurement of air leakage over a range of pressures to return an air leakage result which is reported in ACH (air changes/hour) and/or m3/hr.m2 (air permeability rate).
- If the test result does not meet the client's target, we can locate where air leakage is occurring.
- With the blower door running we use diagnostic tools such as an infrared camera and tracer smoke to locate the main leakage areas. The images and recorded data is compiled in an audit report which provides the customer/builder with specific areas for sealing/remediation.