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Rheem ThermaForce RCBH-L125i Super High-Efficiency Condensing Combi Boilers

Special Price $2,561.00 Regular Price $3,940.00
Drop-ships from manufacturer, 2 to 5 business days

Rheem ThermaForce RCBH-L125i Super High-Efficiency Condensing Combi Boilers

ThermaForce combi boilers are packed with efficiency-improving features in addition to a super high-efficiency condensing heat exchanger.  Built-in high-efficiency variable speed boiler pump uses less electricity than a standard pump.  Outdoor reset technology adjusts the boiler supply temperature automatically based on outdoor temperature fluctuations.  ENERGY STAR certified with up to 96% AFUE and ASME-rated (excludes 160K combi model). 


  • Innovative Labyrinth Heat Exchanger with two independent copper waterways for maximum heat transfer and minimal heat loss

  • Built-in ECM variable speed, high-efficiency boiler pump

  • Built-in Illuminated Touchscreen Control Panel

  • Outdoor reset technology increases efficiency by lowering water temperature automatically

  • Wireless cascading using RF balances the workload of each unit for a longer life - No Wi-Fi is required

  • Only Combi Boilers that can be cascaded for both space heating and domestic hot water


  • Moveable combustion air intake (left/right) and ability to flex vent in existing B-vent

  • Extra long pipe fittings with notched sides for easy gripping with a wrench

  • Only 5 moving parts – Fan, Bypass Valve, Pump, Gas Valve, and Damper

  • Universal shared platform parts – Easily diagnose and service with common parts for all ThermaForce units


  • Dimensions: 10.88" D X 32.5" H X 17.69" W

  • Input Rate BTU/h (Heating Mode): 16,500-99,000

  • Output Rate BTU/h (Heating Mode): 15,800-89,000

  • Input Rate BTU/h (Domestic Hot Water): 16,500-125,000

  • AFUE: 95%

  • Boiler Flow Rate - GPM (min-max): 2-10

  • Max Relative Humidity (Non-Condensing): 90%

  • Minimum Activation Flow Rate (DHW): 0.5 GPM

  • Max Gallons Per Minute - GPM: 4
  • Fuel Type: Electric

  • Primary Warranty: 10 Years

File Downloads

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ThermaForce Combi / Heating Boiler Controller
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ThermaForce Combi Boiler Express
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ThermaForce Condensing Combi Boilers
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ThermaForce Condensing Combi Boilers
More Information
Weight 85.000000
Manufacturer Rheem
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