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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)
140000 - 159999 (15)
160000 - 179999 (16)
180000 - 199999 (4)
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 (1132)
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)
×
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)
85 - 87 (25)
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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$110.00
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Model: 9A338
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Williams High Altitude Conversion Kit - For Williams 35k BTU Natural Gas Room Heaters
Model: 9A344
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Williams High Altitude Conversion Kit - For Williams 50k BTU Propane Room Heaters
Model: 9A347
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Williams High Altitude Conversion Kit For Williams 6501521A
Model: 9A371
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Crown Boiler Aruba 5 - 32K BTU - 84% AFUE - Hot Water Propane Boiler - Chimney Vent
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2% Check Discount
$2,000.00
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Crown Boiler Aruba 5 - 59K BTU - 84% AFUE - Hot Water Propane Boiler - Chimney Vent
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Crown Boiler Aruba 5 - 59K BTU - 84% AFUE - Hot Water Gas Boiler - Chimney Vent
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Crown Boiler Aruba 5 - 88K BTU - 84% AFUE - Hot Water Propane Boiler - Chimney Vent
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2% Check Discount
$2,724.00
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Crown Boiler Aruba 5 - 88K BTU - 84% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: AWR105BNST3PSU
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2% Check Discount
$2,440.00
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Crown Boiler Aruba 5 - 146K BTU - 84% AFUE - Hot Water Propane Boiler - Chimney Vent
Model: AWR175BLST3PSU
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2% Check Discount
$2,900.00
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Crown Boiler Aruba 5 - 146K BTU - 84% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: AWR175BNST3PSU
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2% Check Discount
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Crown Boiler Aruba 5 - 176K BTU - 84% AFUE - Hot Water Propane Boiler - Chimney Vent
Model: AWR210BLST3PSU
(1)
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2% Check Discount
$3,400.00
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Crown Boiler Aruba 5 - 176K BTU - 84% AFUE - Hot Water Gas Boiler - Chimney Vent
Model: AWR210BNST3PSU
(1)
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2% Check Discount
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Crown Boiler Aruba 5 - 205K BTU - 84% AFUE - Hot Water Gas Boiler - Chimney Vent
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2% Check Discount
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Crown Boiler Aruba 5 - 234K BTU - 84% AFUE - Hot Water Propane Boiler - Chimney Vent
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2% Check Discount
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2% Check Discount
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