As of March 2015, National Air Warehouse carries a 150,000 British thermal unit Rheem natural gas furnace priced at just over $1,100. This forced-air furnace is designed for vertical and horizontal up-flow configurations and includes a single-stage multispeed blower motor.
As a part of Rheem's Value Series product line, this furnace is rated at 80 percent efficiency. With 150,000 input BTU, the furnace's heating capacity is 119,000 BTU per hour. National Air Warehouse also sells a Rheem 150,000 BTU down-flow gas furnace with the same specifications and a similar price. Rheem furnaces carry a 10-year warranty on parts and a 20-year warranty on the heat exchanger.