SunStar SIU125-40-L5 U-Tube Vacuum Infrared Heater 125,000 BTU Propane
The SunStar SIU125-40-L5 U-Tube Vacuum Infrared Heater delivers 125,000 BTU of highly efficient radiant heat across a 40-foot U-tube configuration, designed specifically for medium-to-large commercial and industrial facilities running on Propane/LP. This model utilizes a high-safety vacuum (negative pressure) system, which maximizes thermal transfer and securely contains combustion byproducts, preventing leaks into the workspace. The U-tube design ensures a concentrated heat pattern from a single burner, offering superior coverage for repair bays and workshops. The robust construction ensures long-term reliability and low maintenance. Rely on the focused power and proven efficiency of the SunStar SIU125-40-L5 U-Tube heater for economical, comfortable, and dependable area heating.
Description
Offers fuel savings up to 50%. Straight Tube heaters ideal for complete building heating. Positive pressure system pressurizes the combustion chamber. 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. 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 that’s right for you, view the Heat Loss Estimating Chart for proper model and heater selection.
What’s Included
- (1) Burner Package: Main Burner and hardware Emitter Tubes and Reflectors
| Item# | 4774716 |
| Brand | SunStar |
| Manufacturer’s Warranty | 1 year limited warranty |
| Ship Weight | 130.0 lbs |
| Fuel Type | Propane |
| Heat Output | 50,000 Btu/hour |
| Heat Type | Infrared |
| Heating Capability | 500 ft² |
| Blower Included | Yes |
| Assembled Width | 13 in |
| Assembled Height | 12 in |
| Assembled Depth | 252 in |
| Thermostat Included | No |
| Volts | 120 |
| Amps | 2 |
| Product Weight | 104.0000 lb |
| Dimensions L x W x H (in.) | 252.0 x 13.0 x 8.0 in |







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