Propane convection heater delivers 75,000 to 200,000 BTUs of heat.Heats up to 4,700 square feet; ideal for industrial/commercial spaces.Runs up to 29 hours on low setting; piezo push-button ignition; standing pilot for safety.Requires 100-pound propane cylinder (not included); 10-foot hose and regulator included.Measures 18-1/4 by 15 by 27-1/2 inches; 1-year limited warranty.