You can add to the length of the tube heater. It allows for lengths up to 50 feet by adding extension sections.
SunStar, Straight Vacuum Infrared Tube Heater, Fuel Type Natural Gas, Heat Output 75000 Btu/hour, Heat Type Infrared, Model# SIS75-20-N5

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- 20 Foot Emitter Tube Length. Pull Through System-Vacuum system utilizing a draft inducer that pulls the products of combustion through combustion chamber for increased radiant efficiency and greater safety.
- Ideal for complete building heating using multiple heaters. When a single heater is utilized for building space heating (e.g. spot heating) always use a u-tube for more uniform energy distribution.
- Standard Constuction hot rolled emitter tubes. Standard 4" flue and 4" outside combustion air supply to the control box in contaminated environments.
- The minimum mounting height is 13ft. above finished floor for uniform energy distribution and human comfort
- Requires the following clearances from any combustible material: 6in. above, 60in. below and 24in. from the sides of the heater
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