Duct Testing & Blower Door Testing
Duct tests and blower door tests are used to ensure code compliance and assess building performance. ESG’s certified technicians perform these tests for builders and HVAC contractors, as well as property owners.
For builders and HVAC contractors, duct tests (and sometimes blower door tests) are legally required by the energy code.
Duct tests are performed to assess potential leakage in the HVAC system. Our technicians execute these tests on each duct system individually by sealing off the system openings and using a machine called a duct blaster.
NC building and energy codes require leakage testing for all residential duct systems (except those located entirely within a home’s thermal envelope). Upon passing the test, the home receives a duct test certificate for city inspection.
Duct leakage wastes both money and energy, and often causes uncomfortable temperature disparities in a living or working space. In addition, leaky ducts can negatively impact the indoor air quality of the building by facilitating mold growth within the duct system.
Blower door tests determine the air infiltration rate of a building. A blower door is a powerful fan that mounts into the frame of an exterior door. The fan pulls air out of the house, lowering the air pressure inside. The higher pressure outside air then flows in through all unsealed cracks and openings.
ESG’s blower door testing services are performed to determine air leakage and help builders meet code and program requirements for air infiltration and tightness.