Many of our customers here in Arizona have a very difficult time trying to figure out what kind of AC system they have. Arizona is a big heat pump market, but there are also many homes that utilize gas for heating. One of the easiest ways to figure out what type of system you have is by your utility bills. If you receive a gas bill, chances are you have a gas furnace. If you do not receive a gas bill, and your water heater and stove are electric, you most likely you have an electric furnace, or heat pump system. The most simple way to figure this out is to contact your trusted HVAC Professional to maintain your system, and ask them what type of system you have.