Cast Iron Boilers

Select Product Type

Cast iron boilers are a popular choice for both hot water and steam heating applications. We carry a wide selection of cast iron boilers from the top brands, so you can be sure to find one for your needs.

Shop by Fuel Type

Shop by Medium

Shop by Vent Type

Shop by Brand

Shop by Fuel Type

Shop by Medium

Shop by Vent Type

Shop by Brand

Filter ▼

Best Selling▼

Best Selling
Price: Low to High
Price: High to Low
Name: A-Z
Name: Z-A
Recommends Only
Closeouts Only
In-stock Only
Next Day Air Only
Availability

Filters

Brand

Weil-McLain (142)

Burnham (125)

Buderus (33)

Crown Boiler Co. (168)

Peerless (7)

New Yorker (4)

Williamson-Thermoflo (4)

+ Show More

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.

20000 - 89999 (130)

90000 - 159999 (190)

160000 - 229999 (90)

230000 - 299999 (19)

300000 - 369999 (5)

370000 - 439999 (4)

440000 - 509999 (4)

510000 - 579999 (5)

580000 - 649999 (3)

650000 - 719999 (3)

720000 - 789999 (2)

790000 - 859999 (2)

860000 - 929999 (2)

930000 - 999999 (2)

1000000 - 1069999 (2)

1070000 - 1139999 (2)

1140000 - 1209999 (1)

1210000 - 1279999 (1)

1280000 - 1349999 (2)

1350000 - 1419999 (2)

1420000 - 1489999 (2)

1490000 - 1559999 (2)

1630000 - 1699999 (2)

1700000 - 1769999 (2)

1770000 - 1839999 (2)

1910000 - 1979999 (1)

1980000+ (1)

+ Show More

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.

30000 - 69999 (47)

70000 - 109999 (82)

110000 - 149999 (115)

150000 - 189999 (68)

190000 - 229999 (54)

230000 - 269999 (42)

270000 - 309999 (13)

310000 - 349999 (6)

350000 - 389999 (5)

390000 - 429999 (2)

430000 - 469999 (2)

470000 - 509999 (1)

510000 - 549999 (2)

550000 - 589999 (2)

590000 - 629999 (1)

630000 - 669999 (4)

710000 - 749999 (3)

750000 - 789999 (2)

830000 - 869999 (2)

870000 - 909999 (1)

910000 - 949999 (2)

1030000 - 1069999 (2)

1070000 - 1109999 (1)

1150000 - 1189999 (2)

1230000 - 1269999 (2)

1350000 - 1389999 (2)

1470000 - 1509999 (2)

1550000 - 1589999 (2)

1670000 - 1709999 (2)

1790000 - 1829999 (2)

1870000 - 1909999 (2)

1990000 - 2029999 (2)

2070000 - 2109999 (2)

2190000 - 2229999 (2)

2310000+ (2)

+ Show More

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.

30000 - 129999 (101)

130000 - 229999 (141)

230000 - 329999 (68)

330000 - 429999 (13)

430000 - 529999 (7)

530000 - 629999 (1)

630000 - 729999 (3)

730000 - 829999 (2)

830000 - 929999 (3)

1030000 - 1129999 (3)

1130000 - 1229999 (2)

1230000 - 1329999 (3)

1430000 - 1529999 (2)

1530000 - 1629999 (2)

1630000 - 1729999 (2)

1730000 - 1829999 (2)

1930000 - 2029999 (2)

2030000 - 2129999 (2)

2130000 - 2229999 (2)

2330000 - 2429999 (2)

2430000 - 2529999 (2)

2530000 - 2629999 (2)

2730000 - 2829999 (2)

2830000+ (2)

+ Show More

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

77 (3)

81 (47)

82 (110)

83 (72)

84 (125)

85 (57)

86 (25)

87 (15)

91 (4)

+ Show More

Efficiency (%)

77 (3)

82 (3)

86 (4)

87 (6)

Vent Type

Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.

Chimney or Direct Vent (3)

Chimney Vent (414)

Direct Vent (45)

Power Vent (21)

Medium

Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.

Hot Water (336)

Steam (147)

Fuel Type

To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.

Liquid Propane (109)

Natural Gas (256)

Natural Gas/Oil (5)

Oil (107)

Oil/Natural Gas (6)

New Yorker CGS30C - 42K BTU - 81.9% AFUE - Steam Gas Boiler - Chimney Vent

Model: CGS30CNIH

Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 69K BTU Gross Input, 56K BTU DOE Capacity, 42K BTU Net IBR Capacity.

(4)

Closeout

$1,682.00

Was

$1,782.00

SAVE $100.00

Only 1 In-Stock

Free Shipping & Lift Gate

*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.

2% Check Discount

Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.