RSTP Series

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  • Industry's Workhorse Heater Since 1968
  • The Original Unitized Infrared Tube Heater
  • Design Certified by A.G.A.
  • Rugged Body Construction
  • Completely Factory Assembled and Tested
  • Saves Installation Time & Money
  • Proven In High Bay Installations - as High as 68' Above The Floor
  • Ideal For Large Buildings, Aircraft Hangars, Warehouses, Steel Mills, And Other - Hard-to-Heat Industrial Heating Applications
  • Certified For Indoor and Outdoor Installations
  • High Radiant Efficiency
150,000 14'
175,000 16'

* Minimum recommended mounting heights are intended as a guide only, as heaters may be mounted at various heights and angles. Mount heaters as high as possible. Minimums are shown as a guideline for human comfort and uniform enrgy distribution for complete building applications. Please consult your Space-Ray Representative for a detailed analysis of your particular heating requirements.

Control Suffix Type of Gas Control Option Description
N5 Natural Single Stage Gas Valve - Single Stage Input
L5 Propane Single Stage Gas Valve - Single Stage Input
RSTP Series Floor Level Coverage Charts

Floor Level Coverage - The above chart may be used as a guideline for primary radiation, i.e. the infrared pattern directly below the heater. In a well-insulated building, only 50% of the floor needs to be covered by the primary radiant pattern. Please be aware that the radiant energy generated by infrared heaters is not limited to the primary radiant pattern. There is additional radiant energy that is absorbed outside the primary area, a secondary radiant pattern. Since concrete is a very good conductor of heat, a reasonably uniform floor temperature eventually will be reached. The amount of time it takes to reach "thermal equilibrium" is in direct correlation to the distance between the heaters. Learn More >>

Pull-Through System (negative pressure or vacuum)

  • Pull-Through System -- The Products of Combustion are Pulled Through - The Combustion Chamber For Increased Radiant Efficiency and Greater Safety
  • Each Unit is Equipped with An Individual Draft Inducer for Maximum Venting Flexibility
  • Vented, Common Vented, or Indirect Vented Operation
  • Draft Inducer is Equipped with Permanently Lubricated, Totally Enclosed, Fan-Cooled and Heavy Duty Ball Bearing Motor to Minimize Field Maintenance
  • Completely Factory Assembled to Minimize Installation Labor and Cost

Radiant Emitter Tube System

  • Highest Radiant Efficiency Tube Heaters. Tube Temperatures Average 900°F
  • 16 Gauge 4" O.D. Calorized Aluminized Steel Emitter Tubes For Long Life, Corrosion - Resistance, And High Radiant Efficiency -- Will Not Flake Or Peel.
  • The Calorization Process (PDF) Produces An Emitter Tube Which Is Highly Radiant - Absorptive On The Interior And Highly Radiant Emissive On The Exterior

Reflector System

  • Highly Efficient Aluminum Reflectors Designed For Uniform Floor Level Radiant Energy Distribution.
  • Suitable For Horizontal Or Angle Mount Up To 90 Degrees.
  • Reflector Ends Are Enclosed For Maximum Radiant Heat Output And Minimum Convection Loss

Burner System

  • One-Piece Cast Iron Burner With Stainless Steel Flame Retainer.
  • Inside Or Outside Air For Combustion
  • Spark Ignition System With 100% Gas Shut-Off Safety Control (30-Second Pre-Purge); Diaphragm Air Proving Switch; Burner Inspection Sight Glass; Monitoring Light System For On-Line Diagnosis
  • 36" Stainless Steel flexible gas connector included with heater


  • CSA Certified according to ANSI Z83.20 and CSA 2.34. NOT Certified for Residential Use
RSTP17C 175,000 25 13' 5" 32" 9" 236
** Hanging weight is 80% of shipping weight      
NATURAL 3.5" W.C. 5" W.C. 14" W.C. 120 VAC 2.6 DIRECT SPARK
PROPANE 10" W.C. 11" W.C. 14" W.C. 60 HZ
NOTE: For all installations higher than 2000 ft. above sea level please consult the factory regarding recommended derating of heaters.

NOTE: The clearances specified above must be maintained to combustibles and other materials that may be damaged by temperatures 90°F above ambient temperature. Clearances to combustibles are posted on the reflector near the control end of the heater. In locations used for storage of combustible materials where they may be stacked below the heater, NFPA 54 requires that the installer must post signs that will "specify the maximum permissible stacking height to maintain the required clearances from the heater to combustibles".


Heaters can be common vented, vented or indirect vented. A vented installation must be vented outside the building with a flue pipe. An indirect vented installation requires a minimum ventilation flow of 4 CFM per 1000 BTU/hour of total installed heater capacity on natural gas by either gravity or power ventilation (4.18 CFM per 1000 BTU/hour on propane).


Installation and service must be performed by a licensed contractor. The installation must conform to written Installation & Operating Instructions and local codes. In the absence of local codes, the installation must conform with the National Fuel Gas code, ANSI Z223.1 (latest edition also known as NFPA54) or CSA B149 (latest edition) installation codes. These codes are available from the National Fire Protection Association, Inc., Batterymarch Park, Quincy, MA 02269 or the Canadian Gas Association, 55 Scarsdale Road, Toronto, Ontario M3B 2R3, CANADA.


Operate infrared heaters with proper care and observe all safety precautions. Carefully follow printed installation, operating and cleaning instructions furnished with the heater. Do not store gasoline or combustible products in the vicinity of the heater. Do not touch the heater or the tubes while the heater is in operation. Adequate ventilation must always be provided in accordance with codes.

Outdoor Kit

Outdoor Kit ( Part # 42411000) is required when the heater is installed outdoor with no protective cover or overhang. The kit includes Inlet Air Hood as well as Exhaust Hood. Outdoor Kit Installation Instructions (PDF)

Outdoor Kit
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Exhaust Hood- Indoor Indirect Vent Kit

Exhaust Hood- Indoor Indirect Vent Kit ( Part# 42406000) is required when the heater is used indoors as indirect vented (unvented). See I & O for indirect venting requirements. Indoor Unvented Kit Installation Instructions (PDF)

Exhaust Hood- Indoor Indirect Vent Kits
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Tube Heater Accessories

Accessories for common tube heater installations include vent caps, combustion air termination caps, thermostats, programmable digital thermostats, 24V Thermostats relay kits, Thermostat enclosure, Chain Kits, Second Stage Line Regulators, and manual cutoff valves. To learn more click Tube Heater Accessories (PDF).