Mr. Heater 80,000 BTU Propane Convection Heater #MH80CV 30,000-80,000 Btu convection heater For construction sites, emergencies, thawing; heats up to 1,900 square feet Piezo electric pilot ignitor Requires 40-pound cylinder (not included); 10-foot hose and regulator included Adequate combustion and ventilation air must be provided; limited 1-year warranty