It’s understandable that our customers don’t know how to test ducts. There are specialized tools, equipment and experience that are all necessary to adequately preform duct testing, and the subsequent air duct sealing. As we are committed to 100% customer satisfaction, we’re happy to help you learn more about how to test ducts, however this is not a good project for a "do–it–yourself" enthusiast. When our technicians come to perform our duct testing services, we’ll seal off your system entirely. We’ll close off registers and vents, and attach a calibrated fan to the ductwork that’s used to pressurize the system. At that time, we’ll check for a difference between the pressurization of the ducts and the actual pressure within the ducts to determine if there is a leak. These services will let us determine if your ductwork does in fact have a leak, and if it does we will advise you on the next best step. Professional duct sealing is typically an adequate solution. However, in some cases duct repair or replacement might be necessary.