Re-Verber-Ray LD3-20-50, Gas-Fired Low Intensity Tube Heater 50,000 BTU; Two Stage


Re-Verber-Ray LD3-20-50 Low Intensity Tube Heater

  • Input Range: 50,000 BTU/h
  • Electrical: 120V, 60Hz, 1 Ph., 3-wire.
  • Lengths  21’ - 10”
  • Gas Type: Natural or Propane
  • Two-stage gas valve
  • Product Series: Residential
  • Coated Titanium Treated Combustion Chamber
  • Limited Warranty: 1 year - Burner box components; 3 years - Combustion and radiant tubes; 5 years - Burner

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The LD3 Series extends the energy saving benefits of two-stage technology to many commercial, industrial and residential applications. Designed for lower mounting heights, the LD3 Series is ideal for low ceiling commercial/industrial areas such as entry ways, mezzanines, lunch rooms and restaurant patios. Specific models are suitable in residential garages, enclosed swimming pools, solariums and porches.

Product Features

  • Input Range: 35,000 to 50,000 BTU/h
  • Gas Type:  Natural or  Propane
  • Gas Connection: 5/8 in. flare connecting to 1/2” NPT adapter to 1/2 in. x 24 in. (304) SS flex connector provided. 1/8”F NPT ball valve & inlet tapincluded.
  • Electrical: 120V, 60Hz, 1 Ph., 3-wire.
  • Control Amps: 4.8A Starting, 1.1A Running
  • Two-stage Technology.
  • Pre and post purge controls.
  • Tool-free access to controls.
  • Serviceability while unit is operating.
  • Separated air and gas burner chamber.
  • Symmetrical placement of ignition tube.
  • Hinged control compartment provides ease in servicing.
  • 3-piece independent compartment cover.
  • ABS plastic air intake collar for connection to 4” PVC/DWV pipe.


  •  Highly polished aluminum.
  • Continuous overlap design.
  • Two end caps included.
  • Anti-rattle tension springs.
  • One center support per reflector

Benefits Of Heating With Infared

  • Superior Comfort
  • Indoor Air Quality
  • Reduced Energy Consumption
  • Flexibility
  • Durability
  • Radiant Efficiency



Gas Type
Natural or Propane

120V, 60Hz, 1 Ph., 3-wire 

Control Amps
4.8A Starting,
1.1A Running

High Fire
50000 BTU/h 

Low Fire
35000 BTU/h 

Weight (lbs)

Straight Length
21’ - 10”

U-Tube Length
13’ - 0”

Clearance to Combustibles

Front: 11”

Behind: 11”

Top: 6”

Below: 48”

Recommended Mounting Heights and Coverages

Recommended Mounting Height
9’ - 15’

Coverage Area Straight Config. 
22’ x 15’

Coverage Area U-Tube Config. 
12’ x 12’

Distance Between Heaters (ft.)
20’ - 30’

Distance Between Heater Rows (ft.) 
30’ - 50’

Max. Distance Between Heaters and Wall (ft.)