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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)
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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)
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)
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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)
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82 - 84 (93)
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94 - 96 (56)
97 - 99 (9)
Efficiency (%)
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77 - 78 (1)
93 - 94 (1)
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Curved (14)
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Slab Coil (2)
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Available (1525)
Discontinued (1475)
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Runtal UF - 2,790 BTU - Hot Water Baseboard Radiator - 12" H - 36" W - 2" D
Model: UF-4-36-9010R
(9)
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$666.00
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Runtal UF - 3,255 BTU - Hot Water Baseboard Radiator - 12" H - 42" W - 2" D
Model: UF-4-42-9010R
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$697.00
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Runtal UF - 3,720 BTU - Hot Water Baseboard Radiator - 12" H - 48" W - 2" D
Model: UF-4-48-9010R
(9)
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$729.00
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Runtal UF - 4,650 BTU - Hot Water Baseboard Radiator - 12" H - 60" W - 2" D
Model: UF-4-60-9010R
(9)
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$802.00
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Runtal UF - 5,580 BTU - Hot Water Baseboard Radiator - 12" H - 72" W - 2" D
Model: UF-4-72-9010R
(9)
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$862.00
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Runtal Omnipanel - 3,600 BTU - Hydronic Towel Warmer - 26.1" H - 36" W - 3.8" D
Model: TW9-36-9010R
(8)
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(3)
$884.00
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Grundfos UP - 1/12 HP - Single-Speed Circulation Pump - Stainless Steel - GU 125 Union - Check Valve - Digital Timer
Model: 99452462
(9)
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$504.00
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Grundfos UP - 1/6 HP - Single-Speed Circulation Pump - Bronze - GF 40/43 Union
Model: 52722440
(9)
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(2)
$683.00
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Goodman Natural Gas to LP Conversion Kit for Two Stage Furnace
Model: LPM-08
(8)
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$40.00
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Grundfos UPS - 1/15 HP - 3-Speed Circulation Pump - Stainless Steel - GU 125 Union - Check Valve
Model: 59896781
(8)
Q&A
(1)
$590.00
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Grundfos UPS - 1/2 HP - 3-Speed Circulation Pump - Cast Iron - GF 15/26 Flange
Model: 95906630
(8)
Q&A
(1)
$912.00
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Grundfos UPS - 1/2 HP - 3-Speed Circulation Pump - Stainless Steel - GF 15/26 Flange
Model: 95906632
(8)
Q&A
(1)
2% Check Discount
$1,157.00
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Bosch Greenstar Combi 100P - 89K BTU - 95.0% AFUE - Combi Gas Boiler - Direct Vent
Model: ZWB28-3
(8)
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(3)
2% Check Discount
$3,072.00
Free Freight
Free Lift Gate
Factory-Direct!
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Runtal UF - 5,720 BTU - Hot Water Panel Radiator - 18" H - 48" W - 2" D
Model: UF-6-48-3005 WINE RED
(8)
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2% Check Discount
$1,053.00
Free Shipping
Only 2 In-Stock
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Runtal UF - 1,200 BTU - Hot Water Baseboard Radiator - 6" H - 24" W - 2" D
Model: UF-2-24-9010R
(8)
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$499.00
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Runtal UF - 1,500 BTU - Hot Water Baseboard Radiator - 6" H - 30" W - 2" D
Model: UF-2-30-9010R
(8)
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$516.00
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Runtal UF - 1,800 BTU - Hot Water Baseboard Radiator - 6" H - 36" W - 2" D
Model: UF-2-36-9010R
(8)
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$530.00
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Runtal UF - 2,100 BTU - Hot Water Baseboard Radiator - 6" H - 42" W - 2" D
Model: UF-2-42-9010R
(8)
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$545.00
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Runtal UF - 2,400 BTU - Hot Water Baseboard Radiator - 6" H - 48" W - 2" D
Model: UF-2-48-9010R
(8)
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$560.00
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Runtal UF - 3,000 BTU - Hot Water Baseboard Radiator - 6" H - 60" W - 2" D
Model: UF-2-60-9010R
(8)
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$603.00
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Runtal UF - 3,600 BTU - Hot Water Baseboard Radiator - 6" H - 72" W - 2" D
Model: UF-2-72-9010R
(8)
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$634.00
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Runtal UF - 4,200 BTU - Hot Water Baseboard Radiator - 6" H - 84" W - 2" D
Model: UF-2-84-9010R
(8)
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$666.00
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Free Lift Gate
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Runtal UF - 4,800 BTU - Hot Water Baseboard Radiator - 6" H - 96" W - 2" D
Model: UF-2-96-9010R
(8)
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$697.00
Free Shipping
Free Lift Gate
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Runtal UF - 2,860 BTU - Hot Water Panel Radiator - 18" H - 24" W - 2" D
Model: UF-6-24-9010R
(8)
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$769.00
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