(800)865-5931 Mon-Tue 7am-7pm, Wed-Fri 8am-6pm, Sat 9am-2pm CT
EST. 2002
Home Air Products™
My Location: Ashburn, VA [Change]
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Actual product may vary from photos.
The Sterling RSG045N1A has been discontinued.
Please call us for a suitable alternate product.

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This listing contains both the heater and tube body assemblies. 

The power of radiant heat, the Sterling infrared tube heater puts the warmth of the sun inside your building, and it reduces your fuel bills up to 50%! Its radiant heat warms people, concrete floors, and objects. The heat is absorbed and re-radiated to warm the entire area through convection. This, combined with the fact that it is powered by gas, adds up to one unbeatable combination. So, consider a very warm and efficient alternative to competitive heaters just blowing hot air. Consider the Sterling infrared tube heater.

General Features

  • Vacuum System - Products of combustion are pulled through the combustion chamber for greater safety. . . virtually eliminating the possibility of combustion gases leaking into the heated space.
  • Solid State Ignition System - Reliable electronic direct spark ignition system with 100% gas safety shut-off control and 30-second prepurge. . . safety and efficiency assurance.
  • U-Tube Design - Provides uniform emitter tube temperatures and energy distribution on the floor. . . unlike straight tube heaters which are always hotter at the burner end than at the exhaust end.
  • Warranty - 5-year limited combustion chamber warranty.
  • Other Features - Heavy-duty combustion chamber, aluminum reflectors with 97% reflectivity rating, diaphragm safety switch for proof of venting, and system indicator lights.

The Economical Alternative For Hard-To-Heat Spaces up to 5,000 Square Feet

  • Residential Garages
  • Vestibules
  • Entryways
  • Greenhouses
  • Enclosed Patios
  • Solariums
  • Workshops
  • Swimming Pools
  • Farm Buildings
  • Clubhouses
  • Small Businesses
  • Auto Garages
  • Warehouses
  • Print Shops
  • Machine Shops
  • Small Manufacturing Facilities

Included in the Sterling RSG045N1A Box:

(1) Sterling RSG045N1 Heater Unit

(1) Sterling 43468000 Tube Body Assembly 

Heating Capacity

The amount of heat, rated in BTUs that the item can produce.

Heating Capacity
45000 BTU
Effective Heating Capacity (BTUs)
Efficiency Percentage (AFUE)
84.5 %
Minimum Ceiling Clearance to Combustibles
4 Inches
Minimum Floor Clearance to Combustibles
57 Inches
Fuel Type
Natural Gas
Ignition Type
Direct Spark
Combustion Type

Separated combustion draws outside air into the unit combustion chamber where it is burned with the fuel and then vented out with the exhaust. Reduces the common concerns about dusty, dirty, humid or aerosol environments.

Power Vented (or open) combustion pulls the the combustion air from inside the building and pushes the exhaust gases outside using a blower.

Combustion Type
Power Vented
Certified for
Commercial , Industrial
Minimum Side Clearance to Combustibles
12 Inches
Piping Connections - Gas
1/2 inches
Orifice Size

The size of refrigerant metering device that ships with the coil.

Orifice Size
.125 inches
Flue Pipe Diameter

This refers to the size of the flue pipe needed, and not necessarily the actual connection size on the furnace. Flue diameter is based on length of run and number of elbows used. Please read the installation instructions carefully to ensure correct diameter flue size for your application.

Flue Pipe Diameter
Product Weight
88 lbs
Meets CSA Standards

Canadian Standards Association

Meets CSA Standards
111 Inches
18 1/2 Inches
10 1/2 Inches
120 Volts
60 Hz
Voltage Phase
Combustion Chamber Warranty
5 Years
*Any accessories purchased with the Sterling RSG045N1A, are eligible for free shipping.
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