3-RH-SUB Baseray Cast Iron Baseboard Radiator 36" Long 1770 BTU - Right Hand Sub Assembly

3-RH-SUB Baseray Cast Iron Baseboard Radiator 36" Long 1770 BTU - Right Hand Sub Assembly

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Availability: In stock

Model #: 3-RH-SUB
Brand : Burnham

Availability: In stock


Product Highlights:

  • Baseray Cast Iron Baseboard Radiator

  • 1,770BTU@ 180F

  • 36" Long

  • View Additional Sizes Here

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3-RH-SUB Baseray Cast Iron Baseboard Radiator 36" Long 1770 BTU - Right Hand Sub Assembly

A Burnham Original

Baseray is the original cast iron radiant baseboard designed by Burnham with performance and dependability in mind. Its low profile, sleek design fits well with any décor, and it can be painted with a high-grade enamel paint to coordinate with your room’s color scheme. Baseray baseboard radiators put the warm, comfortable and quiet heating of a cast iron radiator in a low profile package. Offering up to 5 times the amount of radiant heat provided by similar metal finned baseboard designs, the rugged and reliable cast iron Baseray baseboard also offers the additional benefit of quiet operation. Cast iron is far less susceptible to the sounds associated with the expansion and contraction of other baseboard radiators, providing both a warm and quiet room.


Burnham Products

  • Industry-Leading High Efficiency Products
  • The Most Knowledgeable People in the Industry
  • World-Class Production Capabilities


  • Comfortable, Even Heat
  • Durable Construction and Quiet Operation
  • Residential or Commercial Applications
  • Assemblies Up To and Including Six Lineal Feet
  • Combines Radiant Heat with Convected Heat


  • Low profile, durable cast iron construction
  • Even heat distribution
  • Durable design
  • Quiet operation
  • Works with all boilers made by U.S. Boiler Company


Comfortable, Even Heat

Although its low profile may be misleading, Baseray cast iron baseboard supplies more than five times as much radiant heat as thin metal fabricated baseboard. Also, because of Baseray’s design, heat is disbursed in both horizontal and vertical directions. Installed on exterior walls, Baseray radiators radiate uniform heat throughout the room, resulting in a less than two-degree temperature variation from floor to ceiling. Baseray baseboard’s one-piece cast iron construction virtually eliminates expansion noises created during the heating cycles, and is built to last much longer than metal fabricated baseboard. Baseray assemblies up to and including 6 lineal ft. are shipped in one piece. Longer assemblies are shipped in two or more pieces or sub-assemblies, none of which exceeds 6 lineal feet.


One-Pipe Steam

  • Up to 28 sq. ft - 1 inch
  • Up to 62 sq. ft - 1-1/4 inches

Hot Water: Two-Pipe Forced Circulation

  • Up to 100 sq. ft - 1/2 inch
  • 101 sq. ft. and larger - 3/4 inch

Hot Water: Two-Pipe Gravity System

  • First floor - Up to 20 sq. ft - 1/2 inch
  • 21 to 50 sq. ft - 3/4 inch
  • 51 to 100 sq. ft - 1 inch
  • 101 to 175 sq. ft - 1-1/4 inch
  • Second floor - Up to 30 sq. ft - 1/2 inch
  • 31 to 70 sq. ft - 3/4 inch
  • 71 to 120 sq. ft - 1 inch
  • 121 to 250 sq. ft - 1-1/4 inch
  • Third floor - Up to 40 sq. ft - 1/2 inch
  • 41 to 100 sq. ft. - 3/4 inch
  • 101 to 175 sq. ft.- 1 inch
  • 175 to 300 sq. ft. - 1-3/4 inch


All sizes based on steel pipe. Vapor tappings, top and bottom opposite ends; supply 3/4 inch, return 1/2 inch For tappings on one-pipe hot water systems see I=B=R Installation Guide. The last connection taken off the main should be run to a first floor radiator Radiators in which mains terminate should have one size larger valves.



Use of the 2,000 Lb./Hr. ratings is limited to installations where the flow rate through the baseboard unit is equal to or greater than 2,000 Lb./Hr. (4GPM). Where the water flow rate through the Baseray is not known, the ratings at the standard flow rate of 500 Lb./Hr. (1GPM)must be used. I=B=R Ratings are determined from tests made in accordance with the I=B=R Testing and Rating Code for baseboard type radiation, including an allowance of 15% for heating effect permitted by the Code.Maximum allowable working pressure - 30 PSI, water; 15 PSI, steam. Water content - 0.3 gal./lineal foot. For pressure drop information, see installation manual. Ratings are based on active length. Active length equals total length

Additional Information

Brand Burnham
Warranty No