A common air conditioning and heating issue is high electric bills. While our units may be keeping us cool or warm, they may not be running as efficiently as possible and this can put some strain on our pocketbooks. Depending on where you live, this can be an issue that Hvac companies chapel hill nc professionals encounter in the winter, summer or even both. There are a few easy things you can check to help your unit run more efficiently. Maybe your windows are not sealed tightly and are letting cool or warm air escape your home. This forces your unit to work harder to get the inside of your home to be the temperature you desire. Some of the causes of this problem you can fix yourself. Snow piled up against the heating unit can cause a problem, as well as dirty air filters and a poorly insulated house.