I take good care of the heating and cooling in my house. I always hire yearly HVAC workers for check ups and tune ups. I enjoy comfort while spending less on energy costs every week. Because of this, I was rather surprised when I had some issues with the gas furnace last Winter. It seemed as if the heating system was running non stop, and yet my house felt slightly freezing. There were cold spots in multiple rooms, and I kept turning up the thermostat. My annually bill was much higher than usual. Plus, I noticed a superb deal of airborne dust and an awful musty smell. I finally hired a local HVAC supplier to take a look at the gas furnace. He informed me that the problem was a result of many leaks in the duct system. While the gas furnace is relatively new, the HVAC duct is undoubtedly 20 years old. I’d never even considered having the duct plan inspected, cleaned or worked on in anyway. Because it’s hidden in the walls, ceilings and crawl spaces, I totally forgot about it. Small holes in the ducts were allowing the heated air to escape, and bringing in polluted outside air. The flaws in the duct plan were contaminating indoor air quality, impacting comfort, and placing needless strain on the gas furnace.