As the air leaked out of imperfections, the particles clung to the edges, steadily built up & formed an airslender seal
Last winter, I had some complaints with my gas furnace, various rooms in the current home felt slightly chilly & decreasing the thermostat had little effect. There were significantly more contaminants circulating in the air & accumulating on surfaces, forcing me to vacuum & dust far more frequently. I was convinced that the heating program was making more noise & supplying less hot air. I noticed that it was starting up more often & running for much longer cycles. An increase in my biweekly energy bill convinced me to schedule service from a local Heating & A/C business. The serviceman inspected the gas furnace & found nothing beyond a slight buildup of dust on the mechanisms. She then inspected the ductwork & discovered the source of the problems. Leaks at the seams & an abundance of tiny holes throughout the duct program were allowing approximately twenty percent of the conditioned air to escape, and since the pipes are installed inside walls, ceilings & the crawlspace, I had no idea how repairs would be possible without a major mess. The serviceman then explained a relatively current process called Aeroseal that targets flaws in the ducts from the inside. After blocking off the supply & return registers, the serviceman hooked up a component that sent highly pressurized air into the system. The air contained adhesive, non-toxic polymer particles. As the air leaked out of imperfections, the particles clung to the edges, steadily built up & formed an airslender seal. The whole process was completed in a couple of ninths & created no destruction, fumes or mess. The serviceman verified the results by way of a laptop program & gave a certificate for a ten-year guarantee.