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Duct Blaster Testing

Up to 25% to 30% of heating & cooling can be lost through improperly sealed and leaky ducting.  High efficiency furnaces and air conditioning can offer only mediocre efficiency performance if the ducts that they are attached to are delivering the conditioned air to where it isn't supposed to go.

Duct testing is accomplished through using a duct blaster fan and a blower door.  The duct blaster is attached to the ducting or plenum of the furnace and similar to a blower door test uses either pressurization or depressurization to determine & locate the amount of leakage that is within the duct system.

With this diagnostic tool we can determine not only the total amount of leakage in the duct system but also whether the leak is outside of the thermal envelope (paying to heat/cool the outdoors).

A high performance HVAC system should have very few duct leaks.  This test can determine whether the HVAC contractor completed their job properly to ensure that the system performs correctly or if they just sold a furnace & air conditioning system.

Efficiency certification programs & 2009/2012/2015/2018 IECC code compliance require duct testing and stated levels of permitted duct leakage.

Has this HVAC system been performance tested?  That is another fair question to ask a builder or homeowner prior to making a purchase decision.  Utility bills are an on-going and long term proposition which factors into the overall "cost" of a building.

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