Offers fuel savings up to 50%. Tough Guy Straight Tube heaters are ideal for complete building heating. Positive pressure system pressurizes the combustion chamber. The emitter tubes are made of heat treated aluminized steel. All gas and electrical connection at the same end of the heater. Reliable direct spark ignition and 100% gas shut-off safety control. Up to 40ft. of ducting in fresh air or 40ft. sidewall venting capability. Blower is located inside the burner box. Ideal for applications where minimal noise (less than 60dB) is desired. Heavy duty permanently lubricated and ball bearing blower motor for maintenance-free operation. Highly efficient aluminum reflectors. Includes diaphragm air switch, heavy duty cast iron burner and burner inspection sight glass. Diagnostic monitoring light system. 120V supply required. External 24V thermostat connection or line voltage operation. Mount heaters as high as possible. Tough Guy Series is ideal for Car Washes, Greenhouses, Swimming Pools, Waste Water Treatment plants, Dairy Barns and other high humidity environments. CSA certified. 5 Year Limited Warranty on tubes. 1 Year Limited Warranty on unit. Made in the USA. Installation and service must be performed by a licensed contractor and must conform to local codes and SunStar's Installation Instructions. Read the Installation and Operating Instructions for specific Installation requirements prior to purchase. To help pick out the heater and the model that's right for you, view the Heat Loss Estimating Chart for proper heater selection.