Boilers

Shop By Brand
Shop By Fuel Type
Shop By Vent Type
Shop By Feature
Featured Categories
Filter ▼
Learn More About Burnham ES24BNI-Gacw-sale-badge
Burnham ES2 - 89K BTU - 85.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Write A Review
Floor Mounted, Cast Iron Boiler with Conversion Included. Ships Packaged. Ratings: 105K BTU Gross Input, 89K BTU DOE Capacity, 77K BTU Net IBR Capacity. Includes Circulator.
Item#: 150665
Model#: ES24BNI-G
Brand: Burnham
$3,582.76
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
In-Stock
Burnham ES2 - 89K BTU - 85.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Learn More About Burnham ES25BNI-Gacw-sale-badge
Burnham ES2 - 119K BTU - 85.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Write A Review
Floor Mounted, Cast Iron Boiler with Conversion Included. Ships Packaged. Ratings: 140K BTU Gross Input, 119K BTU DOE Capacity, 103K BTU Net IBR Capacity. Includes Circulator.
Item#: 150666
Model#: ES25BNI-G
Brand: Burnham
$4,010.18
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Only 2 In-Stock
Burnham ES2 - 119K BTU - 85.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Learn More About Burnham ES26BNI-Gacw-sale-badge
Burnham ES2 - 149K BTU - 85.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Write A Review
Floor Mounted, Cast Iron Boiler with Conversion Included. Ships Packaged. Ratings: 175K BTU Gross Input, 149K BTU DOE Capacity, 130K BTU Net IBR Capacity. Includes Circulator.
Item#: 150667
Model#: ES26BNI-G
Brand: Burnham
$4,578.64
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Only 3 In-Stock
Burnham ES2 - 149K BTU - 85.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Learn More About Burnham K2WT-120B-6G00acw-sale-badge
Burnham K2 - 112K BTU - 95.0% AFUE - Hot Water Gas Boiler - Direct Vent
Write A Review
Wall Mounted, Condensing Boiler with Gas Valve. Ships Packaged. Ratings: 120K BTU Gross Input, 112K BTU DOE Capacity, 97K BTU Net IBR Capacity. High capacity Pre-Installed Boiler Loop Circulator.
Item#: 150670
Model#: K2WT-120B-6G00
Brand: Burnham
$2,596.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Only 3 In-Stock
Burnham K2 - 112K BTU - 95.0% AFUE - Hot Water Gas Boiler - Direct Vent
Learn More About Burnham K2WT-150B-6G00acw-sale-badge
Burnham K2 - 142K BTU - 95.0% AFUE - Hot Water Gas Boiler - Direct Vent
Write A Review
Wall Mounted, Condensing Boiler with Gas Valve. Ships Packaged. Ratings: 150K BTU Gross Input, 142K BTU DOE Capacity, 123K BTU Net IBR Capacity. High capacity Pre-Installed Boiler Loop Circulator.
Item#: 150671
Model#: K2WT-150B-6G00
Brand: Burnham
$2,811.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
In-Stock
Burnham K2 - 142K BTU - 95.0% AFUE - Hot Water Gas Boiler - Direct Vent
Learn More About Burnham SIN6LNI-LE2acw-sale-badge
Burnham Independence Series - 144K BTU - 82.1% AFUE - Steam Gas Boiler - Chimney Vent - Semi-Packaged - Trim Sold Separately
Write A Review
Floor Mounted, Cast Iron Boiler with Step-opening Gas Valve. Ships Packaged. Ratings: 175K BTU Gross Input, 144K BTU DOE Capacity, 108K BTU Net IBR Capacity.
Item#: 150674
Model#: SIN6LNI-LE2
Brand: Burnham
$4,383.54
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Only 3 In-Stock
Burnham Independence Series - 144K BTU - 82.1% AFUE - Steam Gas Boiler - Chimney Vent - Semi-Packaged - Trim Sold Separately
Learn More About Burnham SIN7LNI-LE2acw-sale-badge
Burnham Independence Series - 173K BTU - 82.1% AFUE - Steam Gas Boiler - Chimney Vent - Semi-Packaged - Trim Sold Separately
Write A Review
Floor Mounted, Cast Iron Boiler with Step-opening Gas Valve. Ships Packaged. Ratings: 210K BTU Gross Input, 173K BTU DOE Capacity, 130K BTU Net IBR Capacity.
Item#: 150675
Model#: SIN7LNI-LE2
Brand: Burnham
$4,905.21
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Only 1 In-Stock
Burnham Independence Series - 173K BTU - 82.1% AFUE - Steam Gas Boiler - Chimney Vent - Semi-Packaged - Trim Sold Separately
Learn More About Burnham STMX100N-RH-PAacw-sale-badge
Burnham SteamMax - 82K BTU - 82.0% AFUE - Steam Gas Boiler - Chimney Vent
Write A Review
Floor Mounted, Cast Iron Boiler with Step-opening Gas Valve. Ships Packaged. Ratings: 100K BTU Gross Input, 82K BTU DOE Capacity, 62K BTU Net IBR Capacity.
Item#: 150677
Model#: STMX100N-RH-PA
Brand: Burnham
$4,341.79
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
In-Stock
Burnham SteamMax - 82K BTU - 82.0% AFUE - Steam Gas Boiler - Chimney Vent
Learn More About Burnham STMX125N-RH-PAacw-sale-badge
Burnham SteamMax - 103K BTU - 82.0% AFUE - Steam Gas Boiler - Chimney Vent
Write A Review
Floor Mounted, Cast Iron Boiler with Step-opening Gas Valve. Ships Packaged. Ratings: 125K BTU Gross Input, 103K BTU DOE Capacity, 77K BTU Net IBR Capacity.
Item#: 150678
Model#: STMX125N-RH-PA
Brand: Burnham
$4,935.66
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Only 1 In-Stock
Burnham SteamMax - 103K BTU - 82.0% AFUE - Steam Gas Boiler - Chimney Vent
Learn More About Burnham STMX150N-RH-PAacw-sale-badge
Burnham SteamMax - 124K BTU - 82.0% AFUE - Steam Gas Boiler - Chimney Vent
Write A Review
Floor Mounted, Cast Iron Boiler with Step-opening Gas Valve. Ships Packaged. Ratings: 150K BTU Gross Input, 124K BTU DOE Capacity, 93K BTU Net IBR Capacity.
Item#: 150679
Model#: STMX150N-RH-PA
Brand: Burnham
$5,146.60
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Only 2 In-Stock
Burnham SteamMax - 124K BTU - 82.0% AFUE - Steam Gas Boiler - Chimney Vent
Learn More About Burnham STMX200N-RH-KAacw-sale-badge
Burnham SteamMax - 165K BTU - 82.0% AFUE - Steam Gas Boiler - Chimney Vent
Write A Review
Floor Mounted, Cast Iron Boiler with Step-opening Gas Valve. Ships Packaged. Ratings: 200K BTU Gross Input, 165K BTU DOE Capacity, 124K BTU Net IBR Capacity.
Item#: 150681
Model#: STMX200N-RH-KA
Brand: Burnham
$5,907.95
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
In-Stock
Burnham SteamMax - 165K BTU - 82.0% AFUE - Steam Gas Boiler - Chimney Vent
Learn More About Burnham STMX250N-RM-PAacw-sale-badge
Burnham SteamMax - 206K BTU - 82.0% AFUE - Steam Gas Boiler - Chimney Vent
Write A Review
Floor Mounted, Cast Iron Boiler with Step-opening Gas Valve. Ships Packaged. Ratings: 250K BTU Gross Input, 206K BTU DOE Capacity, 155K BTU Net IBR Capacity.
Item#: 150682
Model#: STMX250N-RM-PA
Brand: Burnham
$6,720.90
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Only 1 In-Stock
Burnham SteamMax - 206K BTU - 82.0% AFUE - Steam Gas Boiler - Chimney Vent
Learn More About Burnham X-PV5N-T02acw-sale-badge
Burnham X-PV - 120K BTU - 85.0% AFUE - Hot Water Gas Boiler - Direct Vent
Write A Review
Floor Mounted, Cast Iron Boiler with Conversion Included. Ships Packaged. Ratings: 140K BTU Gross Input, 120K BTU DOE Capacity, 104K BTU Net IBR Capacity. Includes Circulator.
Item#: 150687
Model#: X-PV5N-T02
Brand: Burnham
$4,083.04
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Only 2 In-Stock
Burnham X-PV - 120K BTU - 85.0% AFUE - Hot Water Gas Boiler - Direct Vent
Learn More About Burnham EB-16WA0acw-sale-badge
Burnham Ambient - 16kW - 54.6k BTU - Hot Water Electric Boiler - 240V Single Phase
Write A Review
Item#: 151523
Model#: EB-16WA0
Brand: Burnham
$2,986.57
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
Burnham Ambient - 16kW - 54.6k BTU - Hot Water Electric Boiler - 240V Single Phase
Learn More About Burnham EB-20WA0acw-sale-badge
Burnham Ambient - 20kW - 68.2k BTU - Hot Water Electric Boiler - 240V Single Phase
Write A Review
Item#: 151524
Model#: EB-20WA0
Brand: Burnham
$3,077.09
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
Burnham Ambient - 20kW - 68.2k BTU - Hot Water Electric Boiler - 240V Single Phase
Learn More About Burnham EB-24WA0acw-sale-badge
Burnham Ambient - 24kW - 82k BTU - Hot Water Electric Boiler - 240V Single Phase
Write A Review
Item#: 151525
Model#: EB-24WA0
Brand: Burnham
$3,167.62
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
Burnham Ambient - 24kW - 82k BTU - Hot Water Electric Boiler - 240V Single Phase
Learn More About Buderus G115WS/5acw-sale-badge
Buderus 136K 87.0% Hot Water Oil Boiler Chimney Vent For G115WS/5
Write A Review
Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 1.10 GPH Gross Input, 136K BTU DOE Capacity, 119K BTU Net IBR Capacity.
Item#: 37440
Model#: G115WS/5
Brand: Buderus
$2,295.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Backordered
Buderus 136K 87.0% Hot Water Oil Boiler Chimney Vent For G115WS/5
Tools & Articles
How to Pick a Residential Boiler
How to Pick a Residential Boiler
Home Boiler System Overview

Boilers at ACWholesalers


A boiler is a central heating system that uses hot water or steam, which is transported through a piping system and to radiators, to heat a home.

One advantage of choosing a residential boiler system is the even distribution of heat. Hot water and steam transfer heat more effectively than air by keeping the heat closer to the ground. Another advantage is efficiency. Boilers require less energy to heat a home than forced-air systems because hot water and steam hold heat longer than air.

Residential boilers also provide flexibility by allowing for zoning different areas of the home. This way, each zone can be kept at its own temperature, maximizing comfort and reducing energy costs for areas where additional heat isn't needed.

Choosing a Residential Boiler System


Medium
A boiler can transfer heat using hot water or steam as its medium. These mediums are not interchangeable, so it is important to know what the existing pipe system is designed for.

Fuel Type
A residential boiler system is made to use one of the following as its fuel source: natural gas, liquid propane, oil, or electricity.

Vent Type
There are three venting options for a residential boiler; direct vent, chimney vent, and power vent. Each type has a different method of removing gasses and is chosen based on the home's construction and desired efficiency of the new system.

Net I=B=R Capacity (BTU) or DOE Heating Capacity (BTU)
Steam boilers are often sized based on their Net I=B=R capacity. This BTU amount factors in piping loss, combustion efficiency, and an extra pickup factor. DOE (Department of Energy) heating capacity also factors in combustion efficiency and is commonly used to size hot water boilers.

AFUE (%)
A boiler's AFUE (Annual Fuel Utilization Efficiency) percentage describes its efficiency. The higher the percentage, the less energy is wasted and the more efficient the model is.