Keep the worksite warm with the Mr. Heater 25,000 BTU Liquid Propane Convection Heater. This portable heater requires no electricity to operate, using a 20-lb. propane cylinder to provide up to 25,000 BTU per hour. It has a standing pilot and thermo-electric safety valve, and a piezo ignition for safe and easy use. DESIGN Portable convection heater Operates up to 17 hours Piezo ignition Standing pilot for added safety Thermo-electric safety valve Quiet and odorless Clean-burning design Uses 20 lb. propane cylinder SPECS: Dimensions: 13" x 13" Weight: 3 lbs. Output: 15,000-25,000 BTU/hour Heating Area: 625 sq ft. Additional Details Suitable for outdoor use only Includes hose and regulator 1-Year Limited Manufacturer's Warranty Style: F270470Z