CHS-155, 125,000 BTU Output Fire Tube Condensing Boiler (NG/LP) Zoom

CHS-155, 125,000 BTU Output Fire Tube Condensing Boiler (NG/LP)


Brand: Slant/Fin

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Fuel Type: Propane
Natural Gas
Vent Type: Direct Vent
System Type: Hydronic (Water)
BTU Input: 155000
DOE Rating:
IBR Rating:
Features: Wall Mounted
Direct Vent
Backlit Display
Built-in Controls
Water Connection: 1-1/4"
Water Connection Type: MNPT
Gas Connection Type: MNPT
Gas Connection: 1/2"
Height: 33-3/8"
Width (Inches): 19-3/4"
Depth (Inches): 18-1/2
Piping: PVC
Stainless Steel
Vent Size: 3"
Weight (lbs): 180 lbs

Description for Slant/Fin CHS-155

Note: Product Title reflects this boiler's IBR Net Output Rating

The new generation of modulating, condensing gas boiler is here. This new generation design sports an ultra-durable stainless steel heat exchanger that is highly corrosion resistant. It has a 5:1 turndown ratio and has the advanced Sola controller and Hapi interface. The CHS boiler comes in 8 sizes to fit a wide range of applications.


  • Up to 96.5% efficiency
  • Stainless Steel heat exchanger
  • Up to 5:1 Modulation ratio
  • 85,000 to 399,000 single boiler Btuh input
  • Natural gas or propane
  • PVC, CPVC, polypropylene or stainless steel air intake and vent pipe up to 100 ft equivalent length
  • Quiet operation
  • Environmentally friendly - Low NOx
  • Built-in digital control board with outdoor reset
  • 5 Year Warranty

PLEASE NOTE: The product weighs 180 lbs. and may require the use of a
lift gate.
If you do require a lift gate at your delivery, you'll have the option to add this FREE of charge when you checkout.

CHS-155, 125,000 BTU Output Fire Tube Condensing Boiler (NG/LP)

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  • CHS-155, 125,000 BTU Output Fire Tube Condensing Boiler (NG/LP)


    It appeared that my CHS 155 boiler stop working. We had a bad snow storm during the night with strong winds. I went downstairs and noticed both the feed and return lines were cold. Things appear to find now. Any idea why this happened?
    Asked on 1/24/2016 by Bland

    1 answer



      Your first step would be to have the installer check the lockout and alerts history on the controller, to get an idea of what specific error might have occurred in the boilers function.

      Answered on 1/29/2016 by SupplyHouse Staff from NY
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