Please ensure Javascript is enabled for purposes of website accessibility

We are closed on Friday, July 4th, 2025 for Independence Day weekend and reopening Monday July 7th, 2025. Enjoy and be safe.

  • 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 225 to 299 MBtu

Boiler and Fuel Type Section

MBtu

Boilers 25 to 99 MBtu Boilers 100 to 149 MBtu Boilers 150 to 224 MBtu Boilers 225 to 299 MBtu Boilers 300 to 399 MBtu Boilers 400 to 499 MBtu Boilers 500 to 699 MBtu Boilers 700 to 999 MBtu Boilers Over 1,000 MBtu

Fuel Type

Natural Gas

Natural Gas
Liquid Propane

Liquid Propane
Oil

Oil
Electric

Electric

Medium

Steam

Steam
Hot Water

Hot Water

Brands

Weil-McLain

Weil-McLain
Peerless Boilers

Peerless Boilers
Burnham

Burnham
Williamson

Williamson
Biasi

Biasi
Utica

Utica
Laars

Laars
Lochinvar

Lochinvar
Green Mountain

Green Mountain
Triangle Tube

Triangle Tube
IBC Technologies

IBC Technologies
Viessmann

Viessmann


4 Items

Set Descending Direction

  2. Green Mountain GMOW Series I
    Oil-Fired, Water
    Cast Iron Heat Exchanger
    Chimney Vent
    86% Efficiency
    https://www.afsupply.com/media/attribute/swatch/swatch_thumb/110x90/w/i/withoutburner.png
    Without Burner
    https://www.afsupply.com/media/attribute/swatch/swatch_thumb/110x90/w/i/withcoil_opening_2.png
    With Coil
    Green Mountain GMA618522210504 GMOWT 259 Input MBtu - 86% AFUE Oil-Fired Hot Water Boiler - with Tankless Coil - Chimney Vent (Burner Sold Separately)
    Retail : $5,796.00 $3,315.31
    You Save (43%)

    • Green Mountain GMA308522210504 GMOWT 119 Input MBtu - 86% AFUE Oil-Fired Hot Water Boiler - with Tankless Coil - Chimney Vent (Burner Sold Separately)

    • Green Mountain GMA412522210504 GMOWT 175 Input MBtu - 86% AFUE Oil-Fired Hot Water Boiler - with Tankless Coil - Chimney Vent (Burner Sold Separately)

    • Green Mountain GMA516022210504 GMOWT 224 Input MBtu - 86% AFUE Oil-Fired Hot Water Boiler - with Tankless Coil - Chimney Vent (Burner Sold Separately)

    • Green Mountain GMA618522210504 GMOWT 259 Input MBtu - 86% AFUE Oil-Fired Hot Water Boiler - with Tankless Coil - Chimney Vent (Burner Sold Separately)

  3. Weil-McLain EG-45 Gas Boilers Series 6
    Gas, Steam
    Cast Iron Heat Exchanger
    Chimney Vent
    82% Efficiency
    https://www.afsupply.com/media/attribute/swatch/swatch_thumb/110x90/w/i/withcoil_opening_3.png
    Without Coil Opening
    https://www.afsupply.com/media/attribute/swatch/swatch_thumb/110x90/k/n/knockdown_1.png
    Knockdown(Assembly required)
    Weil-Mclain 118-754-501 EG-75 282 Input MBtu 82% AFUE Natural Gas Steam Boiler (Knockdown – Assembly Required, No Tankless Coil Opening)
    Retail : $7,909.00 $6,248.11
    You Save (21%)

    • Weil-Mclain 118304501 EG-30 75 Input MBtu 82% AFUE Natural Gas Steam Boiler (Knockdown - Assembly Required, No Tankless Coil Opening)

    • Weil-Mclain 118354501 EG-35 100 Input MBtu 82% AFUE Natural Gas Steam Boiler (Knockdown - Assembly Required, No Tankless Coil Opening)

    • Weil-Mclain 118404501 EG-40 125 Input MBtu 82% AFUE Natural Gas Steam Boiler (Knockdown - Assembly Required, No Tankless Coil Opening)

    • Weil-Mclain EG-45 118454501, 150 Input MBtu 82% AFUE Natural Gas Steam Boiler (Knockdown - Assembly Required, No Tankless Coil Opening)

    • Weil-Mclain 118504501 EG-50 175 Input MBtu 82% AFUE Natural Gas Steam Boiler (Knockdown - Assembly Required, No Tankless Coil Opening)

    • Weil-Mclain 118-554-501 EG-55 200 Input MBtu 82% AFUE Natural Gas Steam Boiler (Knockdown – Assembly Required, No Tankless Coil Opening)

    • Weil-Mclain 118-654-501 EG-65 238 Input MBtu 82% AFUE Natural Gas Steam Boiler (Knockdown – Assembly Required, No Tankless Coil Opening)

    • Weil-Mclain 118-754-501 EG-75 282 Input MBtu 82% AFUE Natural Gas Steam Boiler (Knockdown – Assembly Required, No Tankless Coil Opening)

  4. Weil-McLain EG Boilers Series 6 (No Coil Opening)
    Gas, Water
    Cast Iron Heat Exchanger
    Chimney Vent
    84% Efficiency
    https://www.afsupply.com/media/attribute/swatch/swatch_thumb/110x90/w/i/withcoil_opening_3.png
    Without Coil Opening
    https://www.afsupply.com/media/attribute/swatch/swatch_thumb/110x90/k/n/knockdown_1.png
    Knockdown(Assembly required)
    Weil-Mclain 118-751-500 EG-75 282 Input MBtu 84% AFUE Natural Gas Water Boiler (Knockdown – Assembly Required, No Tankless Coil Opening )
    Retail : $7,470.00 $5,901.30
    You Save (21%)

    • Weil-Mclain 118301500 EG-30 75 Input MBtu 84% AFUE Natural Gas Water Boiler (Knockdown - Assembly Required, No Tankless Coil Opening)

    • Weil-Mclain 118351500 EG-35 100 Input MBtu 84% AFUE Natural Gas Water Boiler (Knockdown - Assembly Required, No Tankless Coil Opening)

    • Weil-Mclain 118401500 EG-40 125 Input MBtu 84% AFUE Natural Gas Water Boiler (Knockdown - Assembly Required, No Tankless Coil Opening)

    • Weil-Mclain 118451500 EG-45 150 Input MBtu 84% AFUE Natural Gas Water Boiler (Knockdown - Assembly Required, No Tankless Coil Opening)

    • Weil-Mclain 118501500 EG-50 175 Input MBtu 84% AFUE Natural Gas Water Boiler (Knockdown - Assembly Required, No Tankless Coil Opening)

    • Weil-Mclain 118-551-500 EG-55 200 Input MBtu 84% AFUE Natural Gas Water Boiler (Knockdown – Assembly Required, No Tankless Coil Opening )

    • Weil-Mclain 118-651-500 EG-65 238 Input MBtu 84% AFUE Natural Gas Water Boiler (Knockdown – Assembly Required, No Tankless Coil Opening )

    • Weil-Mclain 118-751-500 EG-75 282 Input MBtu 84% AFUE Natural Gas Water Boiler (Knockdown – Assembly Required, No Tankless Coil Opening )
per page

Shop By
Now Shopping by
  1. Coil Without Coil Opening Remove This Item
  2. Coil With Coil Remove This Item
Clear All
Shopping Options
System Type
Product Group Name
Burner
Coil
Discount% Range
Manufacturer
Fuel Type
Material
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.