Having a house at a comfortable temperature year round is a priority for most homeowners. If it stays cool in the summer and warm in the winter then most American homeowners don’t think twice about the central heating and air systems in their homes. When the system fails, however, heating and air conditioning service becomes top priority. Luckily, even when you are not concerned about the heating and air units monitoring and maintaining your house, an entire industry of hvac equipment sales and service companies are. Did you know that according to the U.S. Energy Department and the EIA: –air…