Mr. Heater 85,000 BTU Propane Forced-Air Heater #F270085 50000 - 85000 BTU per hour. For use with propane gas Economical; efficient and clean burning. Heats up to 2000 sq. ft. Hose and regulator included Operates up to 8 hours on a 20 lb. propane tank - low setting Rugged; durable; steel construction