The GeoComfort RT outdoor split heat pumps can provide forced air heating and cooling, hot water assists for 25%–40% savings on hot water costs annually, or can be used with a conventional furnace to create a dual-fuel system for optimal energy savings. The RT models are similar to the BS/BT indoor split systems, except the RT is installed outside, making these systems perfect for applications where there isn’t space for a unit indoors, like in small homes or buildings.