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Straight tube heaters ideal for complete building heating. Vacuum system pulls products of combustion through combustion chamber for increased radiant efficiency and greater safety. Reliable direct spark ignition and 100% gas shut-off safety control. Up to 50' of ducting in fresh air and 75' sidewall venting capability. Vacuum system features a totally enclosed combustion chamber. Heavy duty draft inducer assembly features permanently lubricated totally enclosed ball bearing 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. The minimum mounting heights are shown for human comfort and uniform energy distribution for complete building applications. Mount heaters as high as possible. CSA certified. This product has 5 year limited warranty on tubes and 1 year limited warranty on unit. This product is made in USA.
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Weights & Dimensions

• Min Clearance Combustibles at Horizontal Side 27, Ceiling 6, Below 40, End 30 in
• Min Clearance Combustible at 45° Angle Front 48, Rear 12, Ceiling 6, Below 40, End 30 in
• Burner Pressure 10 in
• Min Mounting Height at Horizontal 11 ft
• Width 13 in
• Duct Size 4 in
• Gas Inlet Pressure Max Water Column 14 in
• Tube Length 20 ft
• Length 22-3/4 ft
• Height 6-1/4 in
• Min Mounting Height at 45° Angle 10 ft
• Weight 100.8 lbs

Product Details

• Fuel Type Propane
• Tube Material Hot Rolled Steel
• Assembly Required Assembled
• Description Standard
• BTU High 50000
• Type Negative Pressure Tube
• Brand SunStar
• Material Cast Iron Burner / Aluminum Reflectors
• Warranty 1 yr
• Ignition Type Direct Spark
• Manufacturers Part Number SIS50-20-L5
• Shape Straight