New Yorker Boilers

New Yorker Boilers are cast iron, gas and oil-fired water and steam boilers built for residential and light commercial hydronic heating systems. The CG Series water boilers and CGS-C Series steam boilers use cast iron heat exchangers built to the ASME Boiler and Pressure Vessel Code, and the CG40EN-GH model delivers 77,000 BTU output from a spark ignition, gas-fired water boiler with a low water cutoff. New Yorker backs its cast iron heat exchangers with a lifetime limited warranty, a meaningful detail since the heat exchanger is the most expensive single component to replace in a cast iron boiler. Spark ignition, standing pilot, and electronic ignition control options span a wide BTU range, so a contractor replacing an aging system can typically match output without resizing the rest of the hydronic loop. Cast iron sections also tolerate the water quality swings and thermal cycling common in older buildings, which keeps New Yorker boilers in regular rotation for steam conversions and hydronic retrofits.

Subcategories

• CG Series Gas-Fired Water Boilers: CG Series boilers heat water for baseboard, radiant, and cast iron radiator systems in homes and small commercial buildings. The CG40EN-GH model outputs 77,000 BTU from a spark ignition burner and includes a low water cutoff for added protection on closed hydronic loops. Installers spec this series on replacement jobs where the existing distribution system stays in place and only the boiler gets swapped. Cast iron sections in this series carry the same ASME-rated heat exchanger construction used across the New Yorker water boiler lineup.
• CGS-C Series Gas-Fired Steam Boilers: CGS-C Series boilers produce steam for one-pipe and two-pipe steam radiator systems, a common setup in older multi-family and single-family buildings. The CGS50CNI-H model delivers 85,000 BTU output through electronic ignition and includes a low water cutoff, which shuts the burner down if water level drops below a safe threshold. Steam contractors favor this series on conversion jobs where the original cast iron radiators stay in service. Electronic ignition removes the standing pilot light, cutting standby fuel use compared to older pilot-equipped steam boilers.
• Oil-Fired Cast Iron Boilers: Oil-fired models give contractors a cast iron option for properties without natural gas service or that run on existing oil tanks and delivery contracts. The CL4-168-WET-GB delivers 156,000 BTU output with a tankless coil for indirect domestic hot water and a HydroStat control for boiler water temperature management. Oil-fired units use the same ASME-rated cast iron heat exchanger construction as the gas-fired CG and CGS-C series, paired with an oil burner instead of a gas valve. Technicians working oil-to-oil replacements often choose this line to match existing flue and fuel line connections.

Buying Guide

Start a boiler replacement by confirming fuel type and the existing distribution system before looking at output ratings. A building already piped for steam needs a steam boiler like the CGS-C Series, not a water boiler, even if the BTU numbers look close. Water boiler jobs need a heat loss calculation or, at minimum, a comparison against the output of the unit being replaced, since oversizing a cast iron boiler wastes fuel through short cycling and undersizing leaves rooms cold on design days. New Yorker Boilers cover a wide BTU range across the CG and CGS-C lines, so matching output to the actual heating load matters more than picking the biggest available model. Ignition type is the next decision. Spark ignition and electronic ignition models cut standing pilot losses compared to older pilot light designs, which lowers fuel use during the off season. Low water cutoff protection comes standard on most models and should never get bypassed or removed during installation, since it protects the cast iron sections from dry firing. For oil-fired replacements, confirm the existing tank, fuel line, and chimney connections line up with the new unit's burner and flue requirements before ordering. Cast iron sections add weight and floor loading that lighter aluminum or stainless boilers don't carry, so factor access and rigging into the installation plan, particularly in basements with narrow stairwells or low doorways.

Frequently Asked Questions

What's the difference between the CG Series and CGS-C Series New Yorker boilers?

The CG Series produces hot water for baseboard, radiant, and radiator heating loops, while the CGS-C Series produces steam for one-pipe and two-pipe steam radiator systems. Both series use ASME-rated cast iron heat exchangers, but the internal water content and control sequence differ because steam boilers manage water level rather than just temperature. Picking the wrong series for an existing distribution system means the boiler won't function correctly even if the BTU output matches.

How long does the heat exchanger warranty last on New Yorker Boilers?

New Yorker backs its cast iron heat exchangers with a lifetime limited warranty. Since the heat exchanger is the most expensive single part in a cast iron boiler, that warranty term is a major factor when a contractor compares total ownership cost against other cast iron or aluminum boiler brands.

Can a gas-fired New Yorker boiler replace an oil-fired unit?

Yes, as long as fuel supply, venting, and electrical service get updated to match the gas-fired unit's requirements. New Yorker offers both gas and oil-fired cast iron boilers, so a fuel conversion job can stay within the same heat exchanger platform rather than switching to a different boiler brand altogether.

What does the low water cutoff do on a New Yorker steam boiler?

The low water cutoff shuts the burner down automatically if water level in the boiler drops below a safe operating threshold. Models like the CGS50CNI-H include this protection standard, and it prevents dry firing that can crack or warp cast iron sections.

Are New Yorker Boilers rated for both new construction and replacement jobs?

New Yorker Boilers work in both applications since the CG and CGS-C lines span a wide BTU range across multiple output sizes. Replacement jobs typically match output to the existing distribution system's load, while new construction jobs size off a heat loss calculation for the building.