Importance of duct cleaning in HVAC maintenance dwelling's heating, ventilating, and air-con (HVAC) system can have a big impact on your utility bills — and your comfort and ease. Get these methods to improve the efficiency of your heating and cooling system. Heating your household works by using a lot more Electricity and fees extra money than another system in your residence -- usually producing up about 29% of your utility Monthly bill.Move five: Shut the obtain protect. When you don’t have a cover and may see the edge on the filter, it’s a good idea to grab click to read more some duct tape or possibly a magnetic protect to seal that House.