A duct leakage test evaluates the integrity of a building’s heating and cooling ductwork by measuring the amount of air lost through leaks in the system. During the test, a calibrated fan is connected to the ductwork to pressurize the duct system, allowing the total leakage to be measured. Excessive duct leakage can reduce the amount of conditioned air delivered to living spaces, waste energy, and make it more difficult to maintain consistent indoor temperatures. Testing provides measurable results that help assess duct system performance and identify potential areas for improvement.

What is a Duct Leakage Test?