What Is Duct Testing and Repair?
Duct testing and repair is the process of identifying and sealing leaks in the home’s duct system. The standard procedure starts with a visual inspection of the duct system. This is followed by a duct pressurization test, which should be conducted by a qualified heating and air conditioning contractor or testing organization. This test, often called a “duct blaster” or “blower door” test, determines the amount of air leakage in your duct system and where it is occurring. Common leakage sites are around air registers and grilles, duct connections, panned floor joists, and the connection to the heating and air conditioning unit itself.
Duct testing and repair is the process of identifying and sealing leaks in the home’s duct system. The standard procedure starts with a visual inspection of the duct system. This is followed by a duct pressurization test, which should be conducted by a qualified heating and air conditioning contractor or testing organization. This test, often called a “duct blaster” or “blower door” test, determines the amount of air leakage in your duct system and where it is occurring. Common leakage sites are around air registers and grilles, duct connections, panned floor joists, and the connection to the heating and air conditioning unit itself. Repairs to ducts are made using a special adhesive called “mastic”. Mastic is applied over a mesh tape to form a seal over gaps or leaks in the ducts. This seal will last for many years, unlike old-fashioned cloth duct tape. Other acceptable methods include: silicone caulk, duct sealer, and special foil tape. Duct sealer is available in cans and caulk tube
