Please ensure Javascript is enabled for purposes of website accessibility
  • Sign In
  • Create an Account

Need Help?   Email:

Toggle Nav
Cart Icon Cart
Search
We ship to most places in continental USA
Chat with us
Need help
Our Locations

Boilers

Mbtu

Fuel Type

Medium

Brands



Items 181-216 of 747

Set Descending Direction

  1. Saint Roch SRU Boiler without Coil
    Oil-Fired, Water
    Cast Iron Heat Exchanger
    Direct Vent
    87% Efficiency
    https://www.afsupply.com/media/attribute/swatch/swatch_thumb/110x90/w/i/withoutcoil_opening_2.png
    Without Coil
    Saint Roch SRU30/WL Oil Fired 140 Input Mbtu Water Boiler 87% AFUE, Includes Burner and Trim (Knockdown Boiler- Assembly is required, Coil Sold Separately)
    Retail : $4,337.00 $3,157.34
    You Save (27%)

    • Saint Roch SRU30/WL Oil Fired 140 Input Mbtu Water Boiler 87% AFUE, Includes Burner and Trim (Knockdown Boiler- Assembly is required, Coil Sold Separately)

    • Saint Roch SRU40/WL Oil Fired 175 Input Mbtu Water Boiler 87% AFUE, Includes Burner and Trim (Knockdown Boiler- Assembly is required, Coil Sold Separately)

    • Saint Roch SRU50/WL Oil Fired 210 Input Mbtu Water Boiler 87% AFUE, Includes Burner and Trim (Knockdown Boiler- Assembly is required, Coil Sold Separately)

    • Saint Roch SRU60/WL Oil Fired 245 Input Mbtu Water Boiler 87% AFUE, Includes Burner and Trim (Knockdown Boiler- Assembly is required, Coil Sold Separately)

  5. Green Mountain GMGW Series Boilers
    Gas, Water
    Cast Iron Heat Exchanger
    Vertical Vent
    84% Efficiency
    Green Mountain 15B923503710304 GMGW-K 235 Input MBtu - 84% AFUE Natural Gas-Fired Water Boiler - Vertical Vent
    Retail : $5,221.00 $3,216.14
    You Save (38%)

    • Green Mountain 15B306003710304 GMGW-K 59 Input MBtu - 84% AFUE Natural Gas-Fired Water Boiler - Vertical Vent

    • Green Mountain 15B409503710304 GMGW-K 92 Input MBtu - 84% AFUE Natural Gas-Fired Water Boiler - Vertical Vent

    • Green Mountain 15B512003710304 GMGW-K 120 Input MBtu - 84% AFUE Natural Gas-Fired Water Boiler-Vertical Vent

    • Green Mountain 15B615003710304 GMGW-K 149 Input MBtu - 84% AFUE Natural Gas-Fired Water Boiler - Vertical Vent

    • Green Mountain 15B717503710304 GMGW-K 175 Input MBtu - 84% AFUE Natural Gas-Fired Water Boiler-Vertical Vent

    • Green Mountain 15B820503710304 GMGW-K 205 Input MBtu - 84% AFUE Natural Gas-Fired Water Boiler - Vertical Vent

    • Green Mountain 15B923503710304 GMGW-K 235 Input MBtu - 84% AFUE Natural Gas-Fired Water Boiler - Vertical Vent

  8. Lochinvar Knight Fire Tube Series Boilers (Wall Mount)
    Gas, Water
    Stainless Steel Heat Exchanger
    Direct Vent
    95 % Efficiency
    Lochinvar WHB399N Knight Fire Tube 399 Input MBtu 95% AFUE Residential Condensing Natural Gas Water Boiler - Wall Mount - Direct Vent
    Retail : $15,565.00 $11,642.62
    You Save (25%)

    • Lochinvar WHB055N Knight Fire Tube 55 Input MBtu - 95% AFUE Residential Condensing Natural Gas Water Boiler - Wall Mount - Direct Vent

    • Lochinvar WHB085N Knight Fire Tube 85 Input MBtu - 95% AFUE Residential Condensing Natural Gas Water Boiler - Wall Mount - Direct Vent

    • Lochinvar WHB110N Knight Fire Tube 110 Input MBtu - 95% AFUE Residential Condensing Natural Gas Water Boiler - Wall Mount - Direct Vent

    • Lochinvar WHB155N Knight Fire Tube 155 Input MBtu - 95% AFUE Residential Condensing Natural Gas Water Boiler - Wall Mount - Direct Vent

    • Lochinvar WHB199N KNIGHT Fire Tube 199 Input MBtu - 95% AFUE - Residential Condensing Natural Gas Water Boiler - Wall Mount - Direct Vent

    • Lochinvar WHB285N Knight Fire Tube 285 Input MBtu 95% AFUE Residential Condensing Natural Gas Water Boiler - Wall Mount - Direct Vent

    • Lochinvar WHB399N Knight Fire Tube 399 Input MBtu 95% AFUE Residential Condensing Natural Gas Water Boiler - Wall Mount - Direct Vent

  9. Lochinvar Knight Fire Tube Series Boilers (Floor Standing)
    Gas, Water
    Stainless Steel Heat Exchanger
    Direct Vent
    95% Efficiency
    Lochinvar KHB285N Knight Fire Tube 285 Input MBtu - 95% AFUE Residential Condensing Natural Gas Water Boiler - Floor Mount - Direct Vent
    Retail : $11,815.00 $8,837.62
    You Save (25%)

    • Lochinvar KHB085N Knight Fire Tube 85 Input MBtu - 95% AFUE Residential Condensing Natural Gas Water Boiler - Floor Mount - Direct Vent

    • Lochinvar KHB110N Knight Fire Tube 110 Input MBtu - 95% AFUE Residential Condensing Natural Gas Water Boiler - Floor Mount - Direct Vent

    • Lochinvar KHB155N Knight Fire Tube 155 Input MBtu - 95% AFUE Residential Condensing Natural Gas Water Boiler - Floor Mount - Direct Vent

    • Lochinvar KHB199N Knight Fire Tube 199 Input MBtu - 95% AFUE Residential Condensing Natural Gas Water Boiler - Floor Mount - Direct Vent

    • Lochinvar KHB285N Knight Fire Tube 285 Input MBtu - 95% AFUE Residential Condensing Natural Gas Water Boiler - Floor Mount - Direct Vent

  10. Burnham Steammax Series Package Boilers
    Gas, Steam
    Cast Iron Heat Exchanger
    Chimney Vent
    82% Efficiency
    https://www.afsupply.com/media/attribute/swatch/swatch_thumb/110x90/p/a/packaged_1_1.png
    Packaged
    Burnham STMX100N-RH-PA, SteamMax, 100 Input MBtu, 82% AFUE, Hydrolevel, Residential Natural Gas Steam Boiler, Chimney Vent, 10 Year Warranty, Assembled (3-7 sec.)(Packaged)
    Retail : $5,084.00 $3,968.06
    You Save (22%)

    • Burnham STMX100N-RH-PA, SteamMax, 100 Input MBtu, 82% AFUE, Hydrolevel, Residential Natural Gas Steam Boiler, Chimney Vent, 10 Year Warranty, Assembled (3-7 sec.)(Packaged)

    • Burnham STMX125N-RH-PA, SteamMax, 125 Input MBtu, 82% AFUE, Hydrolevel, Residential Natural Gas Steam Boiler, Chimney Vent, 10 Year Warranty, Assembled (3-7 sec.)(Packaged)

    • Burnham STMX150N-RH-PA, SteamMax, 150 Input MBtu, 82% AFUE, Hydrolevel, Residential Natural Gas Steam Boiler, Chimney Vent, 10 Year Warranty, Assembled (3-7 sec.)(Packaged)

    • Burnham STMX175N-RH-PA, SteamMax, 175 Input MBtu, 82% AFUE, Hydrolevel, Residential Natural Gas Steam Boiler, Chimney Vent, 10 Year Warranty, Assembled (3-7 sec.)(Packaged)

    • Burnham STMX200N-RH-PA, SteamMax, 200 Input MBtu, 82% AFUE, Hydrolevel, Residential Natural Gas Steam Boiler, Chimney Vent, 10 Year Warranty, Assembled (3-7 sec.)(Packaged)

    • Burnham STMX250N-RH-PA, SteamMax, 250 Input MBtu, 82% AFUE, Hydrolevel, Residential Natural Gas Steam Boiler, Chimney Vent, 10 Year Warranty, Assembled (3-7 sec.)(Packaged)

  11. Burnham Steammax Series Residential Boilers
    Gas, Steam
    Cast Iron Heat Exchanger
    Chimney Vent
    82% Efficiency
    Knockdown
    Burnham STMX299N-RH-KA, SteamMax, 299 Input MBtu, 82% AFUE, Hydrolevel, Residential Natural Gas Steam Boiler, Chimney Vent, 10 Year Warranty, Assembled (3-7 sec.)(Knockdown)
    Retail : $8,428.00 $6,578.05
    You Save (22%)

    • Burnham STMX299N-RH-KA, SteamMax, 299 Input MBtu, 82% AFUE, Hydrolevel, Residential Natural Gas Steam Boiler, Chimney Vent, 10 Year Warranty, Assembled (3-7 sec.)(Knockdown)

    • Burnham STMX350N-RH-KS, SteamMax, 350 Input MBtu, 82.5% AFUE, Hydrolevel, Residential Natural Gas Steam Boiler, Chimney Vent, 10 Year Warranty, Split block (8-12 sec.)(Knockdown)

    • Burnham STMX399N-RH-KS, SteamMax, 399 Input MBtu, 82.5% AFUE, Hydrolevel, Residential Natural Gas Steam Boiler, Chimney Vent, 10 Year Warranty, Split block (8-12 sec.)(Knockdown)

    • Burnham STMX450N-RH-KS, SteamMax, 450 Input MBtu, 82.5% AFUE, Hydrolevel Residential, Natural Gas Steam Boiler, Chimney Vent, 10 Year Warranty, Split block (8-12 sec.)(Knockdown)

    • Burnham STMX500N-RH-KS, SteamMax, 500 Input MBtu, 82.5% AFUE, Hydrolevel Residential, Natural Gas Steam Boiler, Chimney Vent, 10 Year Warranty, Split block (8-12 sec.)(Knockdown)

    • Burnham STMX550N-RH-KS, SteamMax, 550 Input MBtu, 82.5% AFUE, Hydrolevel Residential, Natural Gas Steam Boiler, Chimney Vent, 10 Year Warranty, Split block (8-12 sec.)(Knockdown)
Page
per page

Shop By
Shopping Options
Category
  1. Residential Boilers 113 items
  2. Commercial Boilers 49 items
  3. Natural Gas Boilers 561 items
  4. Propane Boilers 67 items
  5. Oil Boilers 146 items
  6. Electric Boiler 18 items
  7. Water Boilers 465 items
  8. Steam Boilers 201 items
Availability
Product Group Name
Burner
Coil
Pump
Water Heater Type for Top Filters
Discount% Range
Manufacturer
BTU Input Range
Fuel Type
Series
Price
OK

By using this site you agree to our Terms, Conditions of Use and Privacy Statement © 2025 AF Supply Corp. All Rights Reserved.