Weil-McLain

Select Product Type

Weil-McLain has been producing durable, American-made boilers for over a century. Their lineup of boilers spans a massive range of capacities and efficiencies with gas-fired and oil-fired options. Shop now for Weil-McLain.

Featured Categories

Boilers

Weil-McLain Boilers

Oil Burners

Weil-McLain Oil Burners

Indirect Water Heaters

Weil-McLain Indirect Water Heaters

Boilers

Heaters

Heat Exchangers

Shop by Series

Boilers

Chimney Vented Boilers

Power Vented Boilers

Direct Vented Boilers

Combi Boilers

High Efficiency Boilers

Oil Burners

Heaters

Indirect Water Heaters

Pool Heaters

Heat Exchangers

Brazed Plate Exchangers

Forced Air Exchangers

Shop by Series

Filter ▼

Best Selling▼

Best Selling
Price: Low to High
Price: High to Low
Name: A-Z
Name: Z-A
Recommends Only
Closeouts Only
In-stock Only
Next Day Air Only
Availability

Filters

Type

Accessories (3)

Indirect Water Heater (9)

Manifold Kit (4)

DOE Heating Capacity (BTU)

Also referred to as Gross Output, this is the output of a boiler after accounting for combustion efficiency. We recommend sizing hot water boilers based on the DOE Heating Capacity.

30000 - 159999 (127)

160000 - 289999 (65)

290000 - 419999 (12)

420000 - 549999 (5)

550000 - 679999 (2)

680000 - 809999 (4)

810000 - 939999 (2)

940000 - 1069999 (7)

1070000 - 1199999 (3)

1200000 - 1329999 (2)

1330000 - 1459999 (5)

1460000 - 1589999 (4)

1590000 - 1719999 (2)

1720000 - 1849999 (2)

1850000 - 1979999 (5)

1980000 - 2109999 (4)

2110000 - 2239999 (2)

2240000 - 2369999 (2)

2370000 - 2499999 (1)

2760000+ (1)

+ Show More

Net I=B=R Capacity (BTU)

I=B=R, also referred to as Net Output or AHRI Capacity, is the rated heat output of a boiler after accounting for combustion efficiency, piping loss, and an extra pickup factor. We recommend sizing steam boilers based on the I=B=R rating.

20000 - 169999 (164)

170000 - 319999 (40)

320000 - 469999 (5)

470000 - 619999 (4)

620000 - 769999 (5)

770000 - 919999 (7)

920000 - 1069999 (4)

1070000 - 1219999 (4)

1220000 - 1369999 (5)

1370000 - 1519999 (4)

1520000 - 1669999 (6)

1670000 - 1819999 (4)

1820000 - 1969999 (2)

1970000 - 2119999 (2)

2420000+ (1)

+ Show More

Maximum Input Capacity (BTU)

The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.

30000 - 229999 (148)

230000 - 429999 (28)

430000 - 629999 (7)

630000 - 829999 (6)

830000 - 1029999 (5)

1030000 - 1229999 (5)

1230000 - 1429999 (2)

1430000 - 1629999 (7)

1630000 - 1829999 (4)

1830000 - 2029999 (5)

2030000 - 2229999 (4)

2230000 - 2429999 (2)

2430000 - 2629999 (5)

2630000 - 2829999 (2)

2830000+ (3)

+ Show More

AFUE (%)

AFUE (Annual Fuel Utilization Efficiency) measures the efficiency of combustion equipment over the entire heating season, and is calculated by dividing the amount of energy that is actually heating your home by the total energy contained in the fuel used by the boiler/furnace. Learn More

81 (40)

82 (33)

83 (17)

84 (105)

85 (10)

86 (1)

87 (1)

91 (5)

92 (2)

93 (4)

94 (3)

95 (28)

96 (1)

+ Show More

Vent Type

Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.

Chimney Vent (200)

Direct Vent (61)

Power Vent (56)

Medium

Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.

Hot Water (222)

Hot Water/Steam (9)

Steam (63)

Fuel Type

To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.

Indirect Fired (9)

Liquid Propane (72)

LP to NG (7)

Natural Gas (264)

NG to LP (17)

Oil (62)

Modulating/Staging

Stages are unique speeds or levels that equipment can operate at. More stages allow for better fine-tuned control of output, which improves comfort and efficiency. Modulating equipment can operate across a range of levels, giving the highest level of fine-tuned control. Learn More

Modulating (46)

Single Stage (211)

Weil-McLain Oil Burner for GO-9 - Beckett AFG - 2.55 GPH - Chimney Vent

Model: 386700420

(2)

$479.90

Factory-Direct

Free Shipping

*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.