Brand -

Caleffi (41)

Williams (87)

Pensotti (73)

Modine (251)

Nest (1)

Ecostyle (38)

Goodman (19)

Reznor (69)

Noritz (5)

Weil-McLain (95)

Runtal (180)

Amtrol (18)

Buderus (74)

Burnham (53)

Electro Industries (79)

InfraSave (44)

Revolv (16)

Taco (36)

Crown Boiler Co. (50)

Grundfos (40)

AIC Alliance (9)

Bosch Thermotechnology (7)

Diversitech (3)

Hydrolevel (26)

Triangle Tube (5)

Berko (4)

ProSelect Force Boilers (3)

Rinnai (3)

Watts Radiant (37)

Honeywell (1)

King Electric (1)

SunTouch (121)

Unico (1)

Viega (1)

White Rodgers (10)

WSD (2)

Number of Zones

A zone is a room or area within a building that has its own temperature control. -

1 (1)

3 (1)

6 (1)

Type -

Adapter Kit (1)

Air and Dirt Separator (13)

Air Purger (1)

Air Separator (1)

Air Vent (4)

Baseboard (413)

Blower (4)

Cable (28)

Ceiling Unit Heater (1)

Circulator (15)

Clamp (1)

Coil Cabinet (1)

Connection Adapter (1)

Control (3)

Conversion Kit (1)

Couple (1)

Coupling (1)

Deflector (18)

Deflector Blade (1)

Electric Furnace (6)

Electric Wall Furnace (5)

Fan Convector (2)

Flashing (2)

Floor Base (1)

Flue Extension (1)

Gas Conversion Kit (4)

Gas Floor Furnace (3)

Gas Furnace (29)

Gas Wall Furnace (48)

Heavy Duty (1)

Ignitor (4)

Isolating Valve (2)

Manifold Kit (2)

Mat (88)

Mount (1)

Mounting Brackets (1)

Oil Furnace (6)

Panel (265)

Parts (1)

Pipe Trace Controls & Accessories (1)

Roof Jack Kit (9)

Screen (2)

Smoke Alarm (3)

Smoke and CO Alarm (1)

Standard (13)

Stub-Out (1)

Temperature Gauge (1)

Thermostat (3)

Towel Warmer (488)

Vent Cap (4)

Vent Kit (1)

Venting Accessories (3)

Zone Control (4)

Zoning Circulator (2)

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. -

Enter Net I=B=R Capacity (BTU) Range Minimum Value To Enter Net I=B=R Capacity (BTU) Range Maximum Value

20000 - 39999 (4)

40000 - 59999 (12)

60000 - 79999 (30)

80000 - 99999 (26)

100000 - 119999 (25)

120000 - 139999 (22)

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)

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. -

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 (13)

110000 - 129999 (25)

130000 - 149999 (27)

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)

Heating BTU -

1000 - 5999 (988)

6000 - 10999 (158)

11000 - 15999 (26)

16000 - 20999 (4)

21000 - 25999 (8)

26000 - 30999 (2)

31000 - 35999 (14)

36000 - 40999 (11)

41000 - 45999 (4)

46000 - 50999 (8)

51000 - 55999 (5)

56000 - 60999 (13)

61000 - 65999 (4)

66000 - 70999 (1)

76000 - 80999 (14)

81000 - 85999 (1)

86000 - 90999 (1)

91000 - 95999 (5)

96000 - 100999 (6)

106000 - 110999 (1)

116000 - 120999 (2)

121000+ (3)

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. +

10000 - 39999 (27)

40000 - 69999 (50)

70000 - 99999 (46)

100000 - 129999 (84)

130000 - 159999 (55)

160000 - 189999 (39)

190000 - 219999 (40)

220000 - 249999 (21)

250000 - 279999 (25)

280000 - 309999 (29)

310000 - 339999 (7)

340000 - 369999 (15)

370000 - 399999 (5)

400000 - 429999 (13)

490000 - 519999 (3)

580000 - 609999 (1)

610000 - 639999 (1)

940000 - 969999 (1)

1000000+ (1)

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. Learn More +

58 - 60 (3)

64 - 66 (8)

67 - 69 (21)

70 - 72 (25)

73 - 75 (8)

76 - 78 (17)

79 - 81 (12)

82 - 84 (93)

85 - 87 (25)

91 - 93 (11)

94 - 96 (60)

97 - 99 (7)

Efficiency (%) +

77 - 78 (1)

93 - 94 (1)

Product Status

Discontinued (1497)

Available (1503)

Heating Reviews

1503 Products Found