There are three major categories of furnaces that can be installed by Reliant Heating & Air Conditioning Services. First is the natural gas furnace, these systems are easy to maintain, but do require an inspection to be sure they’re running safely. Natural gas furnaces are the most popular style of furnace, and modern gas furnaces are rated between 89 to 98 percent efficiency. Second is the oil furnace, which many Denver homes in colder regions use to heat their homes, as it provides more intense heat than other solutions. Oil furnaces require more maintenance than other types of furnace, however, the fuel burns clean and heats homes very efficiently. The last kind of furnace is the electric furnace, which produces no byproducts during the heating process, but may struggle to maintain heat a Denver property when temperatures become exceptionally frigid.