A dirty filter will slow down air flow and make the system work harder to keep you warm or cool - wasting energy. At a minimum, change the filter every 3 months. If the filter looks dirty after a month, change it. Change your air filter regularlyĬheck your filter every month, especially during heavy use months (winter and summer). Take these steps to increase the efficiency of your heating and cooling system. So making smart decisions about your home's heating, ventilating, and air conditioning (HVAC) system can have a big effect on your utility bills - and your comfort. Nearly half of the energy used in your home goes to heating and cooling.
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