KING KPH-60 - Propane Heater, Forced Air- 40,000 - 60,000 BTU/H60,000 BTU H Forced Air Construction Propane Heater; Forced air heater is ideal for spaces up to 1,500 sq. feet such as construction sites, garages, workshops, warehouses and barns. Variable heat settings for efficient use and continuous electronic ignition. Features Forced air heater is ideal for spaces up to 1,500 ft, spaces such as construction sites, garages, workshops, warehouses and barns Variable heat settings for efficient use Continuous