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Hot Water Boilers

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One of the most common mediums used with boilers, hot water is a very effective way to carry heat throughout your home or office. Use the options below to find the perfect hot water boiler. For extra help, read our boiler buying guide.
Burnham - Save 50% On Select Boilers
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Model Number 203EN-G0 is a Recently Added Product
Learn More About 203EN-G0
Burnham Series 2 - 58k BTU - 84% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: 203EN-G0
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Included Grundfos Circulator and LWCO. Ratings: 69K BTU Gross Input, 58K BTU DOE Capacity, 50K BTU Net IBR Capacity.
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$1,965.00
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Model Number 383100005 is the Number 1 Seller
Learn More About 383100005
Weil-McLain AquaBalance™ WMB-155 - 143K BTU - 94.4% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383100005
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 155K BTU Gross Input, 143K BTU DOE Capacity, 124K BTU Net IBR Capacity.
11% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(9)
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$1,069.50
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$2,139.00
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Model Number 383100020 is the Number 2 Seller
Learn More About 383100020
Weil-McLain AquaBalance™ WMB-120C - 109K BTU - 92.2% AFUE - Combi Gas Boiler - Direct Vent
Model: 383100020
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.
9% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(8)
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Model 383100020 is a Closeout
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$1,099.50
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$2,199.00
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Model Number 381357804 is the Number 3 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.
7% 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)
$1,818.81
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Model Number 381357832 is the Number 4 Seller
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.
3% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(23)
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$1,821.56
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Model Number 381357808 is the Number 5 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.
3% 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
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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.
3% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(7)
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$974.50
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$1,949.00
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Learn More About 383100015
Weil-McLain AquaBalance™ WMB-80 - 73K BTU - 92.4% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383100015
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 80K BTU Gross Input, 73K BTU DOE Capacity, 63K BTU Net IBR Capacity.
3% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(7)
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$924.50
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$1,849.00
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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.
3% 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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$1,870.00
Was 
$2,170.00
SAVE $300.00
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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.
3% Buy This
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$1,110.00
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$2,220.00
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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.
3% 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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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.
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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$1,870.00
Was 
$2,170.00
SAVE $300.00
Only 1 In-Stock
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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.
2% 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 09/30
$1,299.50
Was 
$2,599.00
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Learn More About 383100010
Weil-McLain AquaBalance™ WMB-80C - 73K BTU - 92.4% AFUE - Combi Gas Boiler - Direct Vent
Model: 383100010
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 80K BTU Gross Input, 73K BTU DOE Capacity, 63K 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(9)
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Model 383100010 is a Closeout
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$1,054.50
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$2,109.00
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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.
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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$1,765.00
Was 
$2,065.00
SAVE $300.00
Only 5 In-Stock
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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.
2% 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
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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.
2% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(6)
Q&A (1)
$2,419.00
Only 3 In-Stock
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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
In-Stock
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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
In-Stock
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Learn More About 382200612
Weil-McLain GV90+5 - 130K BTU - 91.4% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 382200612
Floor Mounted, Cast Iron Condensing Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 140K BTU Gross Input, 130K BTU DOE Capacity, 113K BTU Net IBR Capacity. Includes Circulator.
1% Buy This
4.5 out of 54.5 out of 54.5 out of 54.5 out of 54.5 out of 5(6)
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$3,445.49
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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.
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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$1,765.00
Was 
$2,065.00
SAVE $300.00
Only 2 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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$2,149.00
Only 1 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(24)
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$2,148.00
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Learn More About 381357912
Model 381357912 is a Recommended Product
Weil-McLain CGi-5-PIL - 100K BTU - 83.3% AFUE - Hot Water Propane Boiler - Power Vent
Model: 381357912
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 119K BTU Gross Input, 100K BTU DOE Capacity, 87K BTU Net IBR Capacity. Includes Circulator.
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5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(13)
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$2,248.09
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Freight Icon
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.
Add To Cart

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