The Rheem gas furnaces range offers models providing 80% to over 90% Annual Fuel Utilization Efficiency ratings. The heaters have adjustable operations systems allowing users to save energy and maintain the desired comfort level in the room.
Rheem gas furnaces such as the R96P Classic Plus, the RGGE and the R96V Prestige have a AFUE rating of up to 96%. AFUE ratings measure how efficient the heater is when using fuel. Models from the Rheem Prestige series include Comfort Control Systems, which provide a service alert and a self-diagnostics system that can detect technical and electrical problems. Most furnaces work on two or more heating stages of operation, which means the energy-saving thermostat gives different heating outputs throughout the day.