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A hot water boiler, also called a hydronic boiler, can provide reliable and affordable heat throughout your home or office. View our hydronic boiler offerings below and read our boiler buying guide for more information.
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Model Number 384000003 is a Recently Added Product
Learn More About 384000003
Weil-McLain SVF 1100 - 1,101K BTU - 97.1% Thermal Efficiency - Hot Water Gas Boiler - Direct Vent
Model: 384000003
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 1,134K BTU Gross Input, 1,101K BTU DOE Capacity, 957K Net IBR Capacity
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$22,529.00
Only 2 In-Stock
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Model Number 383100025 is the Number 1 Seller
Learn More About 383100025
Weil-McLain AquaBalance™ WMB-120 - 109K BTU - 92.2% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383100025
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 120K BTU Gross Input, 109K BTU DOE Capacity, 95K BTU Net IBR Capacity.
19% Buy This
4.9 out of 54.9 out of 54.9 out of 54.9 out of 54.9 out of 5(10)
Q&A (1)
Model 383100025 is a Closeout
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On Sale Ends 11/27
$1,169.40
Was 
$1,949.00
SAVE $779.60
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Model Number 381357804 is the Number 2 Seller
Learn More About 381357804
Model 381357804 is a Recommended Product
Weil-McLain CGa-4-PIDN - 88K BTU - 84.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: 381357804
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 105K BTU Gross Input, 88K BTU DOE Capacity, 77K BTU Net IBR Capacity. Includes Circulator.
6% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(28)
Q&A (3)
$1,818.81
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Model Number 381357806 is the Number 3 Seller
Learn More About 381357806
Model 381357806 is a Recommended Product
Weil-McLain CGa-5-PIDN - 117K BTU - 83.5% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: 381357806
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 140K BTU Gross Input, 117K BTU DOE Capacity, 102K BTU Net IBR Capacity. Includes Circulator.
5% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(32)
Q&A (3)
$2,034.51
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Model Number 381357808 is the Number 4 Seller
Learn More About 381357808
Model 381357808 is a Recommended Product
Weil-McLain CGa-6-PIDN - 146K BTU - 83.2% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: 381357808
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 175K BTU Gross Input, 146K BTU DOE Capacity, 127K BTU Net IBR Capacity. Includes Circulator.
5% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(27)
Q&A (2)
$2,328.91
In-Stock
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Model Number K2WT-120A-4G00 is the Number 5 Seller
Learn More About K2WT-120A-4G00
Burnham K2WT-120 - 111K BTU - 94.0% AFUE - Hot Water Gas Boiler - Direct Vent
Model: K2WT-120A-4G00
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 120K BTU Gross Input, 111K BTU DOE Capacity, 97K BTU Net IBR Capacity. Includes Grundfos Circulator.
5% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(1)
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On Sale Ends 11/27
$1,299.50
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$2,599.00
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Learn More About CB199DV-LP
Noritz CB199 - 120k BTU - 95.1% AFUE - Combi Propane Boiler - Direct Vent
Model: CB199DV-LP
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 120K BTU Gross Input, 109K BTU DOE Capacity, 95K BTU Net IBR Capacity. Includes Circulator.
4% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(3)
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On Sale Ends 12/03
$1,333.08
Was 
$2,260.13
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Learn More About CB199DV-NG
Noritz CB199 - 120k BTU - 95.1% AFUE - Combi Gas Boiler - Direct Vent
Model: CB199DV-NG
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 120K BTU Gross Input, 109K BTU DOE Capacity, 95K BTU Net IBR Capacity. Includes Circulator.
2% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(3)
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On Sale Ends 12/03
$1,333.08
Was 
$2,260.13
SAVE $927.05
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Learn More About 381357832
Model 381357832 is a Recommended Product
Weil-McLain CGa-4-PIDL - 88K BTU - 84.0% AFUE - Hot Water Propane Boiler - Chimney Vent
Model: 381357832
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 105K BTU Gross Input, 88K BTU DOE Capacity, 77K BTU Net IBR Capacity. Includes Circulator.
2% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(25)
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$1,821.56
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Learn More About 381357810
Model 381357810 is a Recommended Product
Weil-McLain CGa-7-PIDN - 175K BTU - 83.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: 381357810
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 210K BTU Gross Input, 175K BTU DOE Capacity, 152K BTU Net IBR Capacity. Includes Circulator.
2% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(29)
Q&A (3)
$2,583.38
In-Stock
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Learn More About CB180DV-NG
Noritz CB180 - 100k BTU - 95.1% AFUE - Combi Gas Boiler - Direct Vent
Model: CB180DV-NG
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 100K BTU Gross Input, 92K BTU DOE Capacity, 80K BTU Net IBR Capacity. Includes Circulator.
2% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(2)
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On Sale Ends 12/03
$1,195.08
Was 
$2,116.63
SAVE $921.55
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Learn More About 381357866
Model 381357866 is a Recommended Product
Weil-McLain CGi-6-PIN - 140K BTU - 83.3% AFUE - Hot Water Gas Boiler - Power Vent
Model: 381357866
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 167K BTU Gross Input, 140K BTU DOE Capacity, 122K BTU Net IBR Capacity. Includes Circulator.
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(14)
Q&A (2)
$2,530.41
Factory-Direct
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Learn More About CB180DV-LP
Noritz CB180 - 100k BTU - 95.1% AFUE - Combi Propane Boiler - Direct Vent
Model: CB180DV-LP
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 100K BTU Gross Input, 92K BTU DOE Capacity, 80K BTU Net IBR Capacity. Includes Circulator.
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(2)
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On Sale Ends 12/03
$1,195.08
Was 
$2,116.63
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Learn More About 381357802
Model 381357802 is a Recommended Product
Weil-McLain CGa-3-PIDN - 59K BTU - 84.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: 381357802
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 70K BTU Gross Input, 59K BTU DOE Capacity, 51K BTU Net IBR Capacity. Includes Circulator.
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(28)
Q&A (3)
$1,670.52
Only 4 In-Stock
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Learn More About 381357937
Model 381357937 is a Recommended Product
Weil-McLain CGi-4-PIN - 76K BTU - 85.0% AFUE - Hot Water Gas Boiler - Power Vent
Model: 381357937
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 90K BTU Gross Input, 76K BTU DOE Capacity, 66K BTU Net IBR Capacity. Includes Circulator.
1% Buy This
4.9 out of 54.9 out of 54.9 out of 54.9 out of 54.9 out of 5(10)
Q&A (1)
$2,059.00
In-Stock
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Learn More About 381357834
Model 381357834 is a Recommended Product
Weil-McLain CGa-5-PIDL - 117K BTU - 83.5% AFUE - Hot Water Propane Boiler - Chimney Vent
Model: 381357834
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 140K BTU Gross Input, 117K BTU DOE Capacity, 102K BTU Net IBR Capacity. Includes Circulator.
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(25)
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$2,148.00
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Learn More About NRCB199DV-LP
Noritz NRCB199 - 120k BTU - 95% AFUE - Combi Propane Boiler - Direct Vent
Model: NRCB199DV-LP
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 120K BTU Gross Input, 111K BTU DOE Capacity, 97K BTU Net IBR Capacity. Includes Circulator.
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(2)
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On Sale Ends 12/03
$1,977.08
Was 
$2,149.00
SAVE $171.92
Only 1 In-Stock
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Learn More About 381357800
Model 381357800 is a Recommended Product
Weil-McLain CGa-25-PIDN - 44K BTU - 84.0% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: 381357800
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 52K BTU Gross Input, 44K BTU DOE Capacity, 38K BTU Net IBR Capacity. Includes Circulator.
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(27)
Q&A (3)
$1,512.11
Only 2 In-Stock
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Learn More About 383100050
Weil-McLain AquaBalance™ AB-155-C - 144K BTU - 95% AFUE - Combi Gas Boiler - Direct Vent
Model: 383100050
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 155K BTU Gross Input, 144K BTU DOE Capacity, 125K BTU Net IBR Capacity. Includes Circulator.
1% Buy This
4.9 out of 54.9 out of 54.9 out of 54.9 out of 54.9 out of 5(8)
Q&A (1)
$2,419.00
Only 3 In-Stock
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Learn More About NRCB199DV-NG
Noritz NRCB199 - 120k BTU - 95% AFUE - Combi Gas Boiler - Direct Vent
Model: NRCB199DV-NG
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 120K BTU Gross Input, 111K BTU DOE Capacity, 97K BTU Net IBR Capacity. Includes Circulator.
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(2)
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On Sale Ends 12/03
$1,977.08
Was 
$2,149.00
SAVE $171.92
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Learn More About X-C120A-4L02
Burnham X-C120 - 112K BTU - 94.0% AFUE - Hot Water Gas Boiler- Direct Vent
Model: X-C120A-4L02
Wall Mounted, Condensing Boiler. Ships Packaged. Ratings: 120K BTU Gross Input, 111K BTU DOE Capacity, 97K BTU Net IBR Capacity.
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(2)
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On Sale Ends 11/27
$1,110.00
Was 
$2,220.00
SAVE $1,110.00
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Learn More About 381357943
Model 381357943 is a Recommended Product
Weil-McLain CGi-4-PIL - 76K BTU - 85.0% AFUE - Hot Water Propane Boiler - Power Vent
Model: 381357943
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 90K BTU Gross Input, 76K BTU DOE Capacity, 66K BTU Net IBR Capacity. Includes Circulator.
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(9)
Q&A (1)
$2,059.00
Only 2 In-Stock
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Learn More About 383100055
Weil-McLain AquaBalance™ AB-155-H - 144K BTU - 95% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383100055
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 155K BTU Gross Input, 144K BTU DOE Capacity, 125K BTU Net IBR Capacity.
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4.9 out of 54.9 out of 54.9 out of 54.9 out of 54.9 out of 5(7)
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$2,249.00
Factory-Direct
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Weil-McLain P-WTGO-4 - 145K BTU - 85.0% AFUE - Hot Water Oil Boiler - Chimney Vent - Burner Sold Separately
Model: 386700833
Floor Mounted, Cast Iron Boiler. Ships Packaged. Ratings: 1.20 GPH Gross Input, 145K BTU DOE Capacity, 126K BTU Net IBR Capacity. Includes Circulator.
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4.8 out of 54.8 out of 54.8 out of 54.8 out of 54.8 out of 5(5)
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$2,716.00
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Free Shipping & Lift Gate
Learn More About Free Freight *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.
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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