>Ducts are used to distribute conditioned air throughout a home. However, about 20 to 30 percent of the air that moves through the duct system is lost due to leaks and poorly connected ducts. This can result in insufficient heating or cooling, moisture problems, mold, rot, and higher utility bills.
>A duct leakage tester is designed to measure the airtightness of forced air heating, ventilating and air-conditioning (HVAC) ductwork. A duct leakage tester consists of a calibrated fan for measuring an airflow rate and a pressure sensing device to measure the pressure created by the fan flow. Then it calculates the amount of pressure passing through an orifice plate. Based on the results it determines how much leakage there is.
>These are the various methods for conducting a duct leakage test:
>There are two kinds of leaks, benign and malignant. The malignant leaks should be taken care of immediately. They are the ones that send conditioned air into unconditioned spaces. Benign leaks are the ones leaking inside the conditioned space. Leakage inside the building enclosure isn't quite as bad because it is still within the conditioned space.
>These two kinds of duct leaks require two different types of tests. The malignant leaks occur in ducts that are outside of the conditioned space and you would need an “outside leakage test.” The other test is called the “total leakage test".
>If you would like our help in conducting a duct leakage test in your home, TriState Home Services would be more than happy to assist you. If you own a home or business in Frederick, MD, or a surrounding area, give us a call 866-624-5970 or complete our contact form.