A duct leakage tester is a diagnostic tool designed to measure the airtightness HVAC ductwork. A duct leakage tester consists of a fan and a pressure sensing device to measure the pressure. The combination of pressure and fan flow measurements are used to determine the ductwork airtightness. The airtightness of ductwork is useful knowledge when trying to increase energy conservation and maintain code requirements.
Blower Door Test: A blower door is a fan set up that mounts into the frame of an exterior door. The fan pulls air out of the house, loweringthe air pressure inside. The higher outside air pressure then flows in through all unsealed cracks and openings. These tests determine the air infiltration rate of a home/building.