Commercial buildings generally have complex Heating, Ventilation and Air Conditioning (HVAC) systems which seldom work at maximum efficiency. Symptoms of a low performing building include:

• High annual power bills compared to accepted benchmarks.
• Hot spots and cold spots: sometimes workers at one end of the building are wearing coats while at the other end they are in shirts!
• Inability of the HVAC system to deal with extremely hot or cold outside weather conditions.
• Workers feeling drowsy or complaining of discomfort.

By following the process outlined below we have been able to reduce power consumption and greenhouse gas emissions in existing buildings by over 30% and improve indoor air quality and comfort for occupants.

First stage: Building Assessment

By using a combination of Fan Pressurization and Tracer Gas Decay methods we can quantify precisely how much air is infiltrating the building and compare it to international standards. In our experience Australian buildings generally have leakage figures more than double the maximum levels allowed in other countries.

Fan Pressurization incorporating a Blower Door

Using a Tracer Gas Decay unit

A comprehensive study of the indoor environment is also conducted, which measures critical factors such as carbon dioxide levels, volatile off-gassing, humidity etc.

The "Comfort Cart" measures indoor comfort levels

Measuring radiant energy through windows

After assessing the building we can predict potential energy savings and greenhouse gas emission reductions.

Second stage: Rectification

The most cost effective and practical way to reduce infiltration is different for each building. Methods used include:

• Spray foams
• Caulking
• Fitting of door and window seals
• Erection of internal walls

Caulking leaky eaves

Roofs are a common cause of air leakage

Door seals reduce air leakage

Fitting a window seal

Foam sealing a roof

All our contractors comply with the highest OH&S standards.

Third stage: Final Testing and Review

A complete building analysis is completed following the same processes as used in the initial test. Air Barrier Technologies is the only Australian company that can quantify leakage reductions. An audit of indoor air quality is also conducted to ensure occupant health and comfort standards are being met.

By utilizing ABT’s considerable experience, new buildings can be made to meet international standards for infiltration with little additional cost. Once the building is completed we can test the building to see how it performs against international benchmarks.