A choice of heating systems comes down to more than simply how much money the fuel source will cost you every winter season. The availability of the fuel source is part of the consideration, along with the cost to install the system to run the heat. Once you select a primary heating system, you can also come up with an alternative source of heat as another means of lowering your annual heating bills. The Safety of Appliances Is Most Critical The most important thing to remember with HVAC or any appliances you install and use is that safety must come first. It is important not to buy a heating appliance of any variety if it is not certified to be used or does not meet all safety requirements and local codes.