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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 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 (1137)
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 (26)
40000 - 69999 (48)
70000 - 99999 (46)
100000 - 129999 (81)
130000 - 159999 (54)
160000 - 189999 (39)
190000 - 219999 (41)
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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)
Panel (25)
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Slab Coil (2)
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Product Status
Available (1517)
Discontinued (1483)
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Runtal Omnipanel - 6,600 BTU - Hydronic Towel Warmer - 61.1" H - 30" W - 3.8" D
Model: TW21-30-9010R
(7)
Q&As
(3)
2% Check Discount
$1,555.00
Free Freight
Free Lift Gate
Factory-Direct!
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Runtal Omnipanel - 7,920 BTU - Hydronic Towel Warmer - 61.1" H - 36" W - 3.8" D
Model: TW21-36-9010R
(7)
Q&As
(3)
2% Check Discount
$1,660.00
Free Freight
Free Lift Gate
Factory-Direct!
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Runtal Omnipanel - 1,600 BTU - Hydronic Towel Warmer - 26.1" H - 16" W - 3.8" D
Model: TW9-16-9010R
(7)
Q&As
(3)
$741.00
Free Shipping
Factory-Direct!
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Runtal Omnipanel - 2,000 BTU - Hydronic Towel Warmer - 26.1" H - 20" W - 3.8" D White
Model: TW9-20-9010R
(7)
Q&As
(3)
$765.00
Free Shipping
Factory-Direct!
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Runtal Omnipanel - 2,400 BTU - Hydronic Towel Warmer - 26.1" H - 24" W - 3.8" D
Model: TW9-24-9010R
(7)
Q&As
(3)
$783.00
Free Shipping
Factory-Direct!
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Runtal Omnipanel - 3,000 BTU - Hydronic Towel Warmer - 26.1" H - 30" W - 3.8" D
Model: TW9-30-9010R
(7)
Q&As
(3)
$835.00
Free Shipping
Factory-Direct!
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Runtal Omnipanel - 3,520 BTU - Hydronic Towel Warmer - 61.1" H - 16" W - 3.8" D
Model: TW21-16-9010R
(7)
Q&As
(3)
2% Check Discount
$1,307.00
Free Freight
Free Lift Gate
Backordered
Estimated Ship Date June 07on new orders
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Grundfos UPS - 1/6 HP - Single-Speed Circulation Pump - Bronze - GF 40/43 Flange
Model: 52722370
(7)
Ask a Question
$998.00
Free Shipping
In-Stock
View Details
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Bosch Greenstar Combi 151P - 134K BTU - 95.0% AFUE - Combi Gas Boiler - Direct Vent
Model: ZWB42-3
(6)
Q&As
(2)
2% Check Discount
$3,851.00
Free Freight
Free Lift Gate
Factory-Direct!
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Grundfos UPS - 1/3 HP - 3-Speed Circulation Pump - Cast Iron - GF 40/43 Flange
Model: 95906636
(6)
Q&A
(1)
$594.00
Free Shipping
In-Stock
View Details
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Grundfos UPS - 1/2 HP - 3-Speed Circulation Pump - Stainless Steel - GF 40/43 Flange
Model: 95906638
(6)
Q&A
(1)
$918.00
Free Shipping
In-Stock
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Grundfos UPS - 1/6 HP - 3-Speed Circulation Pump - Cast Iron - GF 15/26 Flange - Check Valve
Model: 52722513
(6)
Q&A
(1)
$590.00
Free Shipping
Only 2 In-Stock
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Grundfos UPS - 1/6 HP - 3-Speed Circulation Pump - Cast Iron - GF 40/43 Flange - Check Valve
Model: 52722514
(6)
Q&A
(1)
$720.00
Free Shipping
In-Stock
View Details
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Weil-McLain Ultra 155 - 139K BTU - 94% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383500735
(5)
Ask a Question
2% Check Discount
$4,068.00
Free Freight
Free Lift Gate
In-Stock
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Grundfos UPS - 1/6 HP - 3-Speed Circulation Pump - Cast Iron - GF 15/26 Flange - Check Valve
Model: 52722512
(5)
Q&A
(1)
$538.00
Free Shipping
In-Stock
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Grundfos UP - Single Speed Circulation Pump - Bronze - 1-1/4" Union - With Line Cord
Model: 99412493
(5)
Ask a Question
$351.05
Free Shipping
Only 1 In-Stock
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Burnham IN4 - 65K BTU - 82.0% AFUE - Steam Gas Boiler - Chimney Vent - Packaged with Trim
Model: PIN4SNI-ME2
(5)
Q&A
(1)
2% Check Discount
$3,691.00
Free Freight
Free Lift Gate
Factory-Direct!
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Modine Hot Dawg HD - 75,000 BTU - Unit Heater - NG - 80% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger
Model: HD75AS0111
(45)
Q&As
(3)
Offer Ends Monday, December 16
2% Check Discount
$1,207.00
$1,146.00
Free Freight
Free Lift Gate
In-Stock
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Modine Hot Dawg HD - 100,000 BTU - Unit Heater - LP - 80% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger
Model: HD100AS0121
(42)
Q&As
(3)
Offer Ends Monday, December 16
2% Check Discount
$1,362.00
$1,293.00
Free Freight
Free Lift Gate
Factory-Direct!
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Ecostyle - 4,551 BTU - Hot Water Panel Radiator - 24"H x 24"W - White
Model: B-24.24 ECO
(42)
Q&As
(8)
$275.00
Free Shipping
In-Stock
View Details
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Modine PDP - 200,000 BTU - Unit Heater - NG - 83% Thermal Efficiency - Power Vented - Aluminized Steel Heat Exchanger - Propeller
Model: PDP200AE0130
(41)
Q&As
(2)
Offer Ends Monday, December 16
2% Check Discount
$1,854.00
$1,761.00
Free Freight
Free Lift Gate
In-Stock
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Ecostyle - 2,610 BTU - Hot Water Panel Radiator - 20"H x 16"W - White
Model: B-20.16 ECO
(40)
Q&As
(8)
$213.00
Free Shipping
Only 2 In-Stock
View Details
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Ecostyle - 3,916 BTU - Hot Water Panel Radiator - 20"H x 24"W - White
Model: B-20.24 ECO
(40)
Q&As
(8)
$259.00
Free Shipping
In-Stock
View Details
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Ecostyle - 3,037 BTU - Hot Water Panel Radiator - 24"H x 16"W - White
Model: B-24.16 ECO
(40)
Q&As
(8)
$217.00
Free Shipping
In-Stock
View Details
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