Boilers

  • CGA-4 - 77,000 BTU Boiler Spark Ignition (NG)
    SKU: 381-357-804
    Brand: Weil Mclain
    (15)
    $1,759.95 each
    22
    Wed, Jan 2 – Fri, Jan 4
    22
    QtyArrives
    22 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • WTGO-3 100,000 BTU Gold Oil Boiler w/ Tankless Heater
    SKU: 386-700-832
    Brand: Weil Mclain
    (10)
    $2,119.95 each
    10
    Wed, Jan 2 – Fri, Jan 4
    10
    QtyArrives
    10 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • WGO-3 100,000 BTU Output Gold Oil Boiler
    SKU: 386-700-828
    Brand: Weil Mclain
    (10)
    $1,859.95 each
    3
    Wed, Jan 2 – Fri, Jan 4
    3
    QtyArrives
    3 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • GV90+4 84,000 BTU High Efficiency Gas Boiler (NG & LP)
    SKU: 382-200-611
    Brand: Weil Mclain
    (11)
    $2,695.95 each
    2
    Wed, Jan 2 – Fri, Jan 4
    2
    QtyArrives
    2 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • CGA-5 - 102,000 BTU Boiler Spark Ignition (NG)
    SKU: 381-357-806
    Brand: Weil Mclain
    (10)
    $1,969.95 each
    28
    Wed, Jan 2 – Fri, Jan 4
    28
    QtyArrives
    28 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • $3,339.95 each
    8
    Wed, Jan 2 – Fri, Jan 4
    8
    QtyArrives
    8 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • GV90+5 113,000 BTU High Efficiency Gas Boiler (NG & LP)
    SKU: 382-200-612
    Brand: Weil Mclain
    (5)
    $3,099.95 each
    10
    Wed, Jan 2 – Fri, Jan 4
    10
    QtyArrives
    10 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • WGO-2 75,000 BTU Gold Oil Boiler
    SKU: 386-700-827
    Brand: Weil Mclain
    (9)
    $1,549.95 each
    1
    Wed, Jan 2 – Fri, Jan 4
    1
    QtyArrives
    1 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • $2,745.95 each
    6
    Wed, Jan 2 – Fri, Jan 4
    6
    QtyArrives
    6 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • $4,189.95 each
    6
    Wed, Jan 2 – Fri, Jan 4
    6
    QtyArrives
    6 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • WTGO-4 126,000 BTU Gold Oil Boiler w/ Tankless Heater
    SKU: 386-700-833
    Brand: Weil Mclain
    (5)
    $2,549.95 each
    8
    Wed, Jan 2 – Fri, Jan 4
    8
    QtyArrives
    8 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • CGA-6 - 127,000 BTU Boiler Spark Ignition (NG)
    SKU: 381-357-808
    Brand: Weil Mclain
    (4)
    $2,359.95 each
    1
    Wed, Jan 2 – Fri, Jan 4
    1
    QtyArrives
    1 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • WGO-4 126,000 BTU Gold Oil Boiler
    SKU: 386-700-829
    Brand: Weil Mclain
    (5)
    $2,189.95 each
    8
    Wed, Jan 2 – Fri, Jan 4
    8
    QtyArrives
    8 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • $2,485.95 each
    1
    Wed, Jan 2 – Fri, Jan 4
    1
    QtyArrives
    1 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • CGA-3 - 51,000 BTU Boiler Spark Ignition (NG)
    SKU: 381-357-802
    Brand: Weil Mclain
    (3)
    $1,649.95 each
    Mon, Jan 7 – Fri, Jan 11
    Arrives
    Mon, Jan 7 – Fri, Jan 11
    Questions? Call 1-888-757-4774 or LiveChat Img Live Chat
  • $2,355.95 each
    2
    Wed, Jan 2 – Fri, Jan 4
    2
    QtyArrives
    2 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • CGI-6 - 122,000 BTU Spark Ignition Cast Iron Boiler (NG)
    SKU: 381-357-866
    Brand: Weil Mclain
    (5)
    $2,495.95 each
    6
    Wed, Jan 2 – Fri, Jan 4
    6
    QtyArrives
    6 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • CGI-5 - 87,000 BTU Spark Ignition Cast Iron Boiler (NG)
    SKU: 381-357-864
    Brand: Weil Mclain
    (2)
    $2,197.95 each
    1
    Wed, Jan 2 – Fri, Jan 4
    1
    QtyArrives
    1 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • $2,929.95 each
    1
    Wed, Jan 2 – Fri, Jan 4
    1
    QtyArrives
    1 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • $2,419.95 each
    5
    Wed, Jan 2 – Fri, Jan 4
    5
    QtyArrives
    5 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • $2,089.95 each
    40
    Thu, Jan 3 – Tue, Jan 8
    40
    QtyArrives
    40 Thu, Jan 3 – Tue, Jan 8
    Questions? Call 1-888-757-4774
  • $2,399.95 each
    1
    Wed, Jan 2 – Fri, Jan 4
    25
    QtyArrives
    1 Wed, Jan 2 – Fri, Jan 4
    24 Thu, Jan 3 – Tue, Jan 8
    Questions? Call 1-888-757-4774
  • $2,289.95 each
    8
    Wed, Jan 2 – Fri, Jan 4
    8
    QtyArrives
    8 Wed, Jan 2 – Fri, Jan 4
    Questions? Call 1-888-757-4774
  • $2,159.95 each
    2
    Wed, Jan 2 – Fri, Jan 4
    39
    QtyArrives
    2 Wed, Jan 2 – Fri, Jan 4
    37 Thu, Jan 3 – Tue, Jan 8
    Questions? Call 1-888-757-4774

Resources

Videos

FAQs

  • High efficiency boilers generally have efficiency ratings over 90%, making them Energy Star approved. These boilers are often modulating and condensing boilers. The modulation feature allows them to operate at different BTU levels depending upon the amount of heat that is required at a given time (as opposed to a traditional boiler that fires at 100% even if only a small amount of heat is required). The condensing property refers to the ability to convert the condensed liquid that is produced by the boiler into energy. By doing so the boiler wastes less energy and is therefore more energy efficient.
  • For replacement boilers, if your previous boiler was sufficient and worked well you can simply replace the existing boiler with a new one that has the same BTU capacity. For boilers that are being installed in new residences you will need to find the BTU requirements by doing a heat loss of your given space. The heat loss will depend on insulation of walls and ceiling, window type and frequency, outdoor temperature, and several other factors. You can click the Rule of Thumb Guide to get a general idea of what you will need, but you should get a detailed heat loss report to know for sure.
  • The top selling brands of boilers are Weil-Mclain and Burnham. However, we have recently begun to sell a large number of the Triangle Tube Solo Boilers.
  • Boilers ship via freight shipping companies, such as Yellow and UPS Freight. When the order ships, we will provide you with the carrier name and tracking number. The boiler will be shipped to your curb. If you need a lift gate on the truck please call to let us know. In general, the freight company will call you to set up a delivery time. If you need a specific delivery time, you may want to call the delivery company once the order ships.
  • SupplyHouse.com honors all manufacturer warranties. If there is any manufacturer defect with the boiler we will replace it upon return, or issue you a credit for the boiler.

Calculators

Articles

  • A boiler uses natural gas, oil, or electricity to heat water or produce steam, which is circulated through a network of pipes into radiators, baseboard convectors, radiant floors or fan-forced coils. On average, 30 to 40% of household energy bills are from heating and cooling costs. The efficiency of boilers is measured by the annual fuel utilization efficiency (AFUE), a measure of overall performance. Some of the highest-rated units are natural gas-fired, with AFUE ratings as high as 99%. In comparison, many older boilers have AFUE ratings of only 55 to 65%. Therefore upgrading to a high efficiency boiler can vastly lower your heating bills.

    System Types
    Boilers can be hot water or steam, and either type can be gas or oil boilers. The piping systems are different for each type. The hot water system boiler uses a pump to circulate hot water while the steam boiler uses its own pressure to circulate steam throughout the system. Both use a burner to heat the water to the temperature that is set on the thermostat. An aquastat monitors the temperature of the water and turns the burner off when the temperature reaches the desired level. Steam boilers must heat the water to a higher temperature, and therefore have lower efficiencies than hot water boilers. Natural-gas-fired boilers are more efficient than oil-fired boilers.

    Combination boilers combine water heating and heat generation in one unit and can save considerable money on heating and water heating costs. The heating part of the "combi" boiler works in the same fashion as other boilers.

    We offer a large selection of boilers from the top manufacturers in the industry. To decide which boiler is right for you, you can use our custom Boiler Finder tool to narrow down by Fuel Type, System Type, BTU load, efficiency, etc to get the best boiler for your home. There is free shipping on all boilers within the continental United States.

    The boilers category also contains subcategories for Replacement Parts, Gas Conversion Kits, Controls, and Venting.
1-888-757-4774 We're here to help
Monday – Thursday
8am–7:45pm ET
Friday
9am–7:45pm ET
  • Product Image

  • Product Image

    Select 2 to 3 items to compare

  • Product Image

    Compare up to 1 more item

Why don't we show the price of this item?

We try to always offer you the lowest prices possible, but some manufacturers require that we only show these low prices once you take further action.

To see the price, simply add the item to your cart or sign in.