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Net I=B=R Capacity (BTU)
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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.
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Enter Net I=B=R Capacity (BTU) Range Minimum Value
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Enter Net I=B=R Capacity (BTU) Range Maximum Value
20000 - 39999 (4)
40000 - 59999 (12)
60000 - 79999 (30)
80000 - 99999 (24)
100000 - 119999 (25)
120000 - 139999 (21)
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160000 - 179999 (16)
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200000 - 219999 (6)
220000 - 239999 (5)
240000 - 259999 (3)
260000 - 279999 (1)
300000 - 319999 (1)
320000 - 339999 (3)
340000+ (1)
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DOE Heating Capacity (BTU)
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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.
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Enter DOE Heating Capacity (BTU) Range Minimum Value
To
Enter DOE Heating Capacity (BTU) Range Maximum Value
30000 - 49999 (2)
50000 - 69999 (14)
70000 - 89999 (30)
90000 - 109999 (12)
110000 - 129999 (24)
130000 - 149999 (26)
150000 - 169999 (5)
170000 - 189999 (17)
190000 - 209999 (16)
210000 - 229999 (3)
230000 - 249999 (7)
250000 - 269999 (5)
270000 - 289999 (3)
290000 - 309999 (2)
350000 - 369999 (1)
370000 - 389999 (3)
450000 - 469999 (1)
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Heating BTU
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1000 - 10999 (1133)
11000 - 20999 (30)
21000 - 30999 (10)
31000 - 40999 (30)
41000 - 50999 (13)
51000 - 60999 (20)
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71000 - 80999 (15)
81000 - 90999 (2)
91000 - 100999 (10)
101000 - 110999 (1)
111000 - 120999 (2)
121000+ (3)
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Maximum Input Capacity (BTU)
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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.
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10000 - 39999 (28)
40000 - 69999 (51)
70000 - 99999 (46)
100000 - 129999 (81)
130000 - 159999 (54)
160000 - 189999 (39)
190000 - 219999 (41)
220000 - 249999 (21)
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310000 - 339999 (7)
340000 - 369999 (15)
370000 - 399999 (5)
400000 - 429999 (12)
490000 - 519999 (3)
580000 - 609999 (1)
610000 - 639999 (1)
940000 - 969999 (1)
1000000+ (1)
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AFUE (%)
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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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58 - 60 (3)
64 - 66 (8)
67 - 69 (21)
70 - 72 (25)
73 - 75 (8)
76 - 78 (17)
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82 - 84 (93)
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91 - 93 (12)
94 - 96 (56)
97 - 99 (9)
Efficiency (%)
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77 - 78 (1)
93 - 94 (1)
Style
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Curved (14)
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Slab (1)
Slab Coil (2)
Straight (36)
Product Status
Available (1525)
Discontinued (1475)
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Williams Monterey - 35,000 BTU - Gas Fired Wall Furnace - NG - 66% AFUE - Single Sided
Model: 3509622A
(8)
Q&A
(1)
Offer Ends Tuesday, December 31
$941.00
$893.95
Free Freight
Free Lift Gate
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Electro Industries 68K BTU Electric Hot Water Boiler 20 kW 240V 1 Ph
Model: EB-MS-20
(7)
Q&As
(2)
2% Check Discount
$2,664.00
Free Shipping
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Modine HSB - 165,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Top/Bottom Connections
Model: HSB165S01
(6)
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2% Check Discount
$1,685.00
Free Freight
Free Lift Gate
In-Stock
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Weil-McLain GV90+4 - 97K BTU - 91.2% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 382200611
(7)
Q&As
(2)
2% Check Discount
$3,915.00
Free Freight
Free Lift Gate
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Weil-McLain GV90+6 - 161K BTU - 91.0% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 382200613
(7)
Q&As
(2)
2% Check Discount
$5,666.49
Free Freight
Free Lift Gate
Only 4 In-Stock
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Revolv E7 - 57k BTU - Electric Furnace - Manufactured Home - 100% Efficiency - 17 kW - Downflow - Multi-Speed - Includes Coil Cabinet
Model: E7ED-017
(7)
Ask a Question
2% Check Discount
$1,239.00
Free Freight
Free Lift Gate
Factory-Direct!
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Modine HSB - 24,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Top/Bottom Connections
Model: HSB24S01
(6)
Ask a Question
$684.00
Free Shipping
Factory-Direct!
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Modine HSB - 33,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Top/Bottom Connections
Model: HSB33S01
(6)
Ask a Question
$784.00
Free Shipping
Factory-Direct!
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Weil-McLain GV90+5 - 130K BTU - 91.4% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 382200612
(6)
Q&As
(2)
2% Check Discount
$5,012.57
Free Freight
Free Lift Gate
Only 4 In-Stock
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Weil-McLain GV90+3 - 65K BTU - 91.9% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 382200610
(6)
Q&As
(2)
2% Check Discount
$3,888.00
Free Freight
Free Lift Gate
Only 2 In-Stock
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Williams High-Efficiency Direct-Vent - 7,400 BTU - Gas Fired Furnace - LP - 72% AFUE - Single-Stage - Wall Mounted - Up To 5,500 Ft Altitude
Model: 0743511
(6)
Ask a Question
Offer Ends Tuesday, December 31
2% Check Discount
$1,418.00
$1,347.10
Free Freight
Free Lift Gate
Only 2 In-Stock
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SunTouch WarmWire - 120 Sq Ft - Radiant Floor Heating Wire - 240V - 470 ft Length - 6.0 Amp Draw
Model: 240120WB-CST
(6)
Q&A
(1)
$774.90
Free Shipping
Factory-Direct!
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Modine HSB - 108,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Top/Bottom Connections
Model: HSB108S01
(5)
Ask a Question
2% Check Discount
$1,331.00
Free Freight
Free Lift Gate
Factory-Direct!
View Details
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Modine HSB - 121,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Top/Bottom Connections
Model: HSB121S01
(5)
Ask a Question
2% Check Discount
$1,442.00
Free Freight
Free Lift Gate
Only 1 In-Stock
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Modine HSB - 18,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Top/Bottom Connections
Model: HSB18S01
(5)
Ask a Question
$605.00
Free Shipping
In-Stock
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Modine HSB - 193,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Top/Bottom Connections
Model: HSB193S01
(5)
Ask a Question
2% Check Discount
$2,010.00
Free Freight
Free Lift Gate
Factory-Direct!
View Details
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Modine HSB - 258,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Top/Bottom Connections
Model: HSB258S01
(5)
Ask a Question
2% Check Discount
$2,474.00
Free Freight
Free Lift Gate
Factory-Direct!
View Details
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Modine HSB - 290,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Top/Bottom Connections
Model: HSB290S01
(5)
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2% Check Discount
$2,759.00
Free Freight
Free Lift Gate
Factory-Direct!
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Modine HSB - 340,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Top/Bottom Connections
Model: HSB340S01
(5)
Ask a Question
2% Check Discount
$3,445.00
Free Freight
Free Lift Gate
Factory-Direct!
View Details
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Modine HSB - 47,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Top/Bottom Connections
Model: HSB47S01
(5)
Q&A
(1)
$917.00
Free Shipping
Only 2 In-Stock
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SunTouch WarmWire - 200 Sq Ft - Radiant Floor Heating Wire - 240V - 783 ft Length - 10.0 Amp Draw
Model: 240200WB-CST
(5)
Q&A
(1)
2% Check Discount
$1,242.15
Free Shipping
Factory-Direct!
View Details
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Williams High-Efficiency Direct-Vent - 17,700 BTU - Gas Fired Furnace - NG - 76% AFUE - Single-Stage - Wall Mounted - Up To 5,500 Ft Altitude
Model: 1773512
(5)
Ask a Question
Offer Ends Tuesday, December 31
2% Check Discount
$2,723.00
$2,586.85
Free Freight
Free Lift Gate
Only 3 In-Stock
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Buderus Model 22 - 6,291 BTU - Hot Water Panel Radiator - 12" H x 59" W x 4" D
Model: 7750100615
(5)
Ask a Question
$659.00
Free Freight
Free Lift Gate
Factory-Direct!
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Buderus Model 22 - 7,022 BTU - Hot Water Panel Radiator - 20" H x 48" W x 4" D
Model: 7750102612
(5)
Ask a Question
$687.00
Free Freight
Factory-Direct!
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