Mr. Heater forced air propane heaters provide instant heat even and feature Quiet Burner Technology, making them 50% quieter than a standard propane heater. The 170,000 BTU model heats up to 4,250 sq. ft. quick and effortlessly and maintains with a built-in thermostat. Includes a 10 ft. hose and regulator and also features variable output from 125,000 to 170,000 BTUs, and automatic solid state ignition for quick and reliable starting. Equipped with a high temperature safety shut-off switch and thermo-electric safety valve to shut down the unit in unsafe conditions, so youll have peace of mind to focus on the task at hand. With an approximate 17 hours of run time on low with a 100 lb. propane tank, whether on the worksite or in the garage, youll stay comfortably warm while getting the job done. California residentssee Prop 65 WARNINGS Forced air propane heater with quiet burner technology, making it 50% quieter High and low settings: 125,000-170,000 BTUs Heats up to 4,250 sq. ft. High temperature safety shut-off switch Thermo-electric safety valve Built-in thermostat Approximate 17 hours of run time on low, 12.5 on high, with a 100 lb. propane tank Automatic solid state ignition, requiring a 115-Volt AC outlet Features Item Weight 19 Material Metal Heater Type Forced Air Number of Heat Settings Variable Heating Product Type Gas Portable Heater Heat rating (BTU/hour) 170000 Run time (hours) 12 Power/Fuel Type Propane Product Weight (lb.) 19 Color Family Blacks Room Size Extra Large Returnable 180-Day Color Blacks Heater Controls Thermostat Fuel Tank Capacity (gallons) 0 Heating Technology Type Forced Air Area Heated (Sq. Ft.) 4250 Fuel rate (gallons/hour) 7.874 Indoor/Outdoor Outdoor Ignition Type Continuous Spark Portable Heater Features Handle,Thermostat Product Height (in.) 16.14173228 Product Width (in.) 9.92125984 Product Depth (in.) 24.48818898 Certifications and Listings CSA Certified Manufacturer Warranty Limited 1 year – Parts