Last summer, I was not happy with the performance of the central air conditioner. The system seemed to run just about non stop and yet couldn’t keep up with demands. The house felt overheated and sticky. There was also a significant temperature swing from one room to another. A musty smell and great deal of dust was originating from the supply vents. Whenever the air conditioner operated, I’d get a headache. Plus, my monthly electric bills were suddenly far more expensive. While the area experienced unusually hot and humid weather, I knew something was wrong with the air conditioner. I googled the issues and determined that the problem was most likely with the ductwork. I found a local HVAC contractor that offers duct system services and scheduled testing. The contractor determined that nearly thirty percent of the conditioned air was escaping through small holes and leaks at the seams. Because the ductwork is largely concealed inside walls and ceilings, I wondered how the contractor would provide sealing without causing a lot of damage. I learned that there is a process called Aeroseal duct sealing that repairs flaws in the ducts from the inside. The contractor blocked off the supply and return vents before sending highly pressurized air into the pipes. The air carried polymer particles that are non-toxic yet adhesive. As the air leaked from the holes, those particles attached to the edges and steadily built up to form an airtight seal. The technician then tested the duct system to verify the success of the results. The whole process was completed within a couple of hours and is warrantied for ten years.