There are 2 new Australian Standards which will affect the HVAC Industry.
AS 4254.1 -2012 Flexible Duct and AS 4254.2-2012 Rigid Duct were released in October 2012. They have now been included in BCA 2013 which makes their requirements legally binding. Clause 2.2.4 of AS 4254.2-2012 requires leak testing of ductwork to 1.25 times operating pressure on systems over 3000L/s.
While large projects especially those with Greenstar ratings have been leak tested previously there has been very little leak testing of the majority of systems. The most contentious issue is how to seal the leaks if the duct fails the test.
Clean Air has been involved with many existing buildings where substantial leaks have been found in ducting especially risers which are very difficult to access and seal.
If you have any systems which have failed a leak test or you are suspicious that you may have excessive leaks in ducting please contact Clean Air to discuss a possible solution.