2-Stage Harsh Environ.Tube Htr: S/S Burner House + Aluminized Tube/Reflector; 155/110 MBH NG; 40 FT; USA Outdoor, Car Wash & Harsh Environment Low-Intensity Two-Stage Gas-Fired Infrared Tube Heater, 150/110 MBH, natural gas, 40 ft tube. Log in for pricing