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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.
To
60000 - 179999
(22)
180000 - 299999
(5)
300000 - 419999
(2)
420000 - 539999
(1)
660000 - 779999
(1)
900000 - 1019999
(2)
1380000 - 1499999
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1860000+
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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.
To
50000 - 159999
(22)
160000 - 269999
(5)
270000 - 379999
(2)
380000 - 489999
(1)
600000 - 709999
(1)
820000 - 929999
(2)
1150000 - 1259999
(2)
1590000+
(2)
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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.
70000 - 199999
(22)
200000 - 329999
(5)
330000 - 459999
(2)
460000 - 589999
(1)
720000 - 849999
(1)
980000 - 1109999
(2)
1500000 - 1629999
(2)
1890000+
(2)
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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.
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91
(1)
91.2
(1)
91.4
(1)
91.7
(1)
91.9
(1)
92.5
(2)
93.5
(2)
93.6
(1)
93.9
(1)
94
(3)
94.1
(1)
94.4
(1)
95
(8)
95.1
(3)
95.2
(3)
95.3
(2)
95.8
(4)
96.5
(1)
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Fuel Type
To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Liquid Propane
(1)
Natural Gas
(36)
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.
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Modulating
(33)
Single Stage
(4)
Ultra Low NOx Emissions
NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Ultra Low NOx appliances emit less than 10-14 ng/J (nanogram per Joule) of NOx.
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No
(4)
Yes
(30)
Product Line
AquaBalance
(4)
ECO
(3)
Evergreen
(6)
GV90+
(4)
SlimFit
(8)
Ultra
(9)
WM97+
(3)
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Product Height (Inches)
27 - 28
(4)
29 - 30
(7)
31 - 32
(3)
39 - 40
(3)
43 - 44
(6)
45 - 46
(3)
47 - 48
(3)
51 - 52
(6)
53 - 54
(2)
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Weil-McLain Ultra 155 CT - 139K BTU - 94.0% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383500723
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 155K BTU Gross Input, 139K BTU DOE Capacity, 123K BTU Net IBR Capacity. Includes Circulator.
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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.
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$2,139.00
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Weil-McLain GV90+6 - 161K BTU - 91.0% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 382200613
Floor Mounted, Cast Iron Condensing Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 175K BTU Gross Input, 161K BTU DOE Capacity, 140K BTU Net IBR Capacity. Includes Circulator.
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$3,499.00
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Weil-McLain AquaBalance™ AB-120-H - 112K BTU - 95% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383100045
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 120K BTU Gross Input, 112K BTU DOE Capacity, 97K BTU Net IBR Capacity.
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Weil-McLain AquaBalance™ AB-80-H - 75K BTU - 95% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383100035
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 80K BTU Gross Input, 75K BTU DOE Capacity, 65K BTU Net IBR Capacity.
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$1,929.00
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Weil-McLain EVG 399 - 383K BTU - 96.5% AFUE - Hot Water Gas Boiler - Direct Vent
Model: EVG 399
Floor/Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 399K BTU Gross Input, 383K BTU DOE Capacity, 333K BTU Net IBR Capacity. Includes Circulator.
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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.
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$3,099.00
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Weil-McLain ECO 110 - 101K BTU - 95.0% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383800004
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 110K BTU Gross Input, 101K BTU DOE Capacity, 88K BTU Net IBR Capacity.
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Weil-McLain Ultra 230 - 207K BTU - 94.1% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383500736
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 230K BTU Gross Input, 207K BTU DOE Capacity, 183K BTU Net IBR Capacity. Includes Circulator.
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$4,189.00
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Weil-McLain ECO 70 - 65K BTU - 95.2% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383800003
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 70K BTU Gross Input, 65K BTU DOE Capacity, 57K BTU Net IBR Capacity.
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$2,359.00
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Weil-McLain GV90+3 - 65K BTU - 91.9% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 382200610
Floor Mounted, Cast Iron Condensing Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 70K BTU Gross Input, 65K BTU DOE Capacity, 56K BTU Net IBR Capacity. Includes Circulator.
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$2,498.00
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Weil-McLain GV90+4 - 97K BTU - 91.2% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 382200611
Floor Mounted, Cast Iron Condensing Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 105K BTU Gross Input, 97K BTU DOE Capacity, 84K BTU Net IBR Capacity. Includes Circulator.
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$2,799.95
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Weil-McLain EVG 220 - 206K BTU - 95.0% AFUE - Hot Water Gas Boiler - Direct Vent
Model: EVG 220
Floor/Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 220K BTU Gross Input, 206K BTU DOE Capacity, 179K BTU Net IBR Capacity. Includes Circulator.
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$4,532.95
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Weil-McLain WM97+ 110 CT - 101K BTU - 95.0% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383700007
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 110K BTU Gross Input, 101K BTU DOE Capacity, 88K BTU Net IBR Capacity. Includes Circulator.
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$3,469.00
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Weil-McLain EVG 110 - 101K BTU - 95% AFUE - Hot Water Gas Boiler - Direct Vent
Model: EVG 110
Floor/Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 110K BTU Gross Input, 101K BTU DOE Capacity, 88K BTU Net IBR Capacity. Includes Circulator.
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$3,100.00
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Weil-McLain EVG 299 - 280K BTU - 95.0% AFUE - Hot Water Gas Boiler - Direct Vent
Model: EVG 299
Floor/Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 299K BTU Gross Input, 280K BTU DOE Capacity, 243K BTU Net IBR Capacity. Includes Circulator.
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$6,086.95
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Weil-McLain SlimFit® SF550 - 517K BTU - 93.9% Thermal Efficiency - Hot Water Gas Boiler - Direct Vent
Model: 383600330
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 550K BTU Gross Input, 517K BTU DOE Capacity, 450K BTU Net IBR Capacity.
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$10,549.00
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Weil-McLain EVG 155 - 143K BTU - 95.1% AFUE - Hot Water Gas Boiler - Direct Vent
Model: EVG 155
Floor/Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 155K BTU Gross Input, 143K BTU DOE Capacity, 124K BTU Net IBR Capacity. Includes Circulator.
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$3,600.00
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Weil-McLain EVG 70 - 65K BTU - 95.2% AFUE - Hot Water Gas Boiler - Direct Vent
Model: EVG 70
Floor/Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 70K BTU Gross Input, 65K BTU DOE Capacity, 57K BTU Net IBR Capacity. Includes Circulator.
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$2,800.00
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Weil-McLain Ultra 299 CT - 270K BTU - 92.5% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383500725
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 299K BTU Gross Input, 270K BTU DOE Capacity, 234K BTU Net IBR Capacity. Includes Circulator.
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$6,539.00
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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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$2,249.00
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Weil-McLain Ultra 105 - 94K BTU - 94% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383500734
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 105K BTU Gross Input, 94K BTU DOE Capacity, 81K BTU Net IBR Capacity. Includes Circulator.
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$2,925.00
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Weil-McLain Ultra 155 - 139K BTU - 94% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383500735
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 155K BTU Gross Input, 139K BTU DOE Capacity, 123K BTU Net IBR Capacity. Includes Circulator.
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$3,339.00
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Weil-McLain Ultra 299 - 270 BTU - 92.5% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383500737
Floor Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 299K BTU Gross Input, 270K BTU DOE Capacity, 234K BTU Net IBR Capacity. Includes Circulator.
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$5,759.00
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