Introduction A blower door test is the best way to locate duct leaks. However, there are several methods for locating duct leaks yourself. This topic discusses finding leaks in duct systems finding insulated duct leaks what to seal first, and more information about air distribution systems. Finding leaks in exposed ducts It is easier to detect leaks in supply duct than in return duct work. This is because supply leaks blow air out.
Professionals use smoke sticks to located duct leakage, especially in the return duct.
You can locate leaks by using incense smoke canisters, or tissue paper. Find out more in the duct system testing and repair program . Finding insulated duct leaks Ducts which are wrapped with fiberglass can have significant leakage, but can be difficult to locate. The inside surface of this insulation can be telling if the ducts are leaking. Inspect for streaks on the inside surface of the insulation.