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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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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)
61000 - 70999 (10)
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)
250000 - 279999 (25)
280000 - 309999 (29)
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)
79 - 81 (13)
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)
Panel (25)
Slab (1)
Slab Coil (2)
Straight (36)
Product Status
Available (1525)
Discontinued (1475)
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Modine HC - 24,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Side Connections
Model: HC24S01
(5)
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$665.00
Free Freight
Free Lift Gate
Only 4 In-Stock
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Modine HC - 258,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Side Connections
Model: HC258S01
(5)
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2% Check Discount
$2,406.00
Free Freight
Free Lift Gate
Factory-Direct!
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Modine HC - 290,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Side Connections
Model: HC290S01
(5)
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2% Check Discount
$2,682.00
Free Freight
Free Lift Gate
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Modine HC - 340,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Side Connections
Model: HC340S01
(5)
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2% Check Discount
$3,349.00
Free Freight
Free Lift Gate
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Modine HC - 47,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Side Connections
Model: HC47S01
(5)
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$891.00
Free Shipping
Only 3 In-Stock
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Modine HC - 63,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Side Connections
Model: HC63S01
(5)
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$975.00
Free Shipping
In-Stock
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Modine HC - 86,000 BTU - Hot Water/Steam Unit Heater - Horizontal - Copper Heat Exchanger - Side Connections
Model: HC86S01
(5)
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2% Check Discount
$1,057.00
Free Shipping
Only 3 In-Stock
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SunTouch WarmWire - 100 Sq Ft - Radiant Floor Heating Wire - 120V - 391 ft Length - 10.0 Amp Draw
Model: 120100WB-CST
(5)
Q&As
(2)
$741.30
Free Shipping
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Bosch Greenstar Combi 131 - 117K BTU - 95.0% AFUE - Combi Gas Boiler - Direct Vent
Model: ZWB35-3
(4)
Q&A
(1)
2% Check Discount
$4,218.00
Free Freight
Free Lift Gate
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Revolv - Roof Jack Kit - 0/12 Pitch - 24-47" Extension - For MG1E Furnaces
Model: 903660
(6)
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$231.00
Free Shipping
Only 2 In-Stock
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Electro Industries 77K BTU Electric Hot Water Boiler 22.5 kW 240V 1 Ph
Model: EB-S-23
(4)
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2% Check Discount
$3,303.00
Free Freight
Free Lift Gate
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Caleffi Series 940 - Radiator Adapter - 1/2" x 3/4" Connections - QTY: 2
Model: 940451
(4)
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$12.83
Free Shipping
In-Stock
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Caleffi Thermostatic Control Head with Built-in Sensor, 45-82 F Temperature Range, used with radiator valves
Model: 200000
(4)
Q&As
(2)
$40.54
Free Shipping
In-Stock
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Taco 0010 - 1/8 HP - Circulator Pump - Cast Iron - Flange
Model: 0010-F3
(4)
Q&A
(1)
$385.50
Free Shipping
Only 1 In-Stock
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Runtal Neptune - 2,766 BTU - Hydronic Towel Warmer - 45.7" H - 19.5" W - 4.2" D - Polished Chrome
Model: NTR-4620C
(3)
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2% Check Discount
$5,327.00
Free Shipping
Factory-Direct!
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Amtrol Extrol - 7.6 Gallon - In-Line Boiler System Expansion Tank
Model: EX-60
(4)
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$135.00
Free Shipping
In-Stock
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Modine HDB - 125,000 BTU - Unit Heater - LP - 80% Thermal Efficiency - Power Vented - Stainless Steel Heat Exchanger
Model: HDB125SS0121
(3)
Q&A
(1)
2% Check Discount
$3,192.00
Free Freight
Free Lift Gate
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Modine HDB - 125,000 BTU - Unit Heater - NG - 80% Thermal Efficiency - Power Vented - Stainless Steel Heat Exchanger
Model: HDB125SS0111
(3)
Q&A
(1)
2% Check Discount
$3,192.00
Free Freight
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Modine HDB - 60,000 BTU - Unit Heater - LP - 80% Thermal Efficiency - Power Vented - Stainless Steel Heat Exchanger
Model: HDB60SS0121
(3)
Q&A
(1)
2% Check Discount
$2,794.00
Free Freight
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Modine HDB - 60,000 BTU - Unit Heater - NG - 80% Thermal Efficiency - Power Vented - Stainless Steel Heat Exchanger
Model: HDB60SS0111
(3)
Q&A
(1)
2% Check Discount
$2,794.00
Free Freight
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Modine HDC - 125,000 BTU - Unit Heater - LP - 80% Thermal Efficiency - Separated Combustion - Stainless Steel Heat Exchanger
Model: HDC125SS0121
(3)
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2% Check Discount
$3,707.00
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Modine HDC - 60,000 BTU - Unit Heater - LP - 80% Thermal Efficiency - Separated Combustion - Stainless Steel Heat Exchanger
Model: HDC60SS0121
(3)
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2% Check Discount
$2,813.00
Free Freight
Free Lift Gate
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Modine HDC - 75,000 BTU - Unit Heater - LP - 80% Thermal Efficiency - Separated Combustion - Stainless Steel Heat Exchanger
Model: HDC75SS0121
(3)
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2% Check Discount
$3,142.00
Free Freight
Free Lift Gate
Factory-Direct!
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Modine Hot Dawg HDS - 100,000 BTU - Unit Heater - LP - 80% Thermal Efficiency - Separated Combustion - Stainless Steel Heat Exchanger
Model: HDS100SS0121
(4)
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2% Check Discount
$2,310.00
Free Freight
Free Lift Gate
Only 1 In-Stock
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