Gas heating systems are a great option for large buildings that require affordable heating. Gas heating systems are comprised of three major components that include the outside air condenser, indoor furnace and evaporator coil. There are several brands options to choose from. The higher the SEER (seasonal energy efficiency rating) the better efficiency and long term savings you will achieve due to the lower energy consumption for cooling. The higher the efficiency for the heating system (furnace) the more efficiently that it will burn fuel, therefore lowering the cost of your heating. If you would like help in selecting the right gas heating system for your home or if you have any questions, give us a call at (888) 292-0874 and we will be glad to assist.