New Yorker Boiler cgs50cni-h Steam Boiler 138 Mbh 82% Afue

Product Description

The NEW YORKER BOILER cgs50cni-h is a fully packaged, floor-mounted cast iron steam boiler rated at 138 MBH input and 82% AFUE, designed for residential and light commercial steam heating systems fired on natural gas. The cast iron heat exchanger delivers durable, long-term performance, while the integrated Honeywell gas valve and electronic ignition system provide reliable, repeatable startup. A probe-type low water cutoff (LWCO), 15 psi pressure relief valve, steam pressure gauge, and built-in draft diverter come factory-installed, reducing field assembly time for licensed heating technicians.

The cgs50cni-h is suited for retrofit and new-install applications in residential and small commercial buildings with existing one-pipe or two-pipe steam distribution systems. With a DOE heating capacity of 113 MBH and a Net IBR rating of 85 MBH, it covers up to 354 square feet of steam radiation. The unit is designed for horizontal venting through a 6-inch flue collar and mounts directly to a level floor. Supply and return connections are 2-inch threaded, and the gas connection is 1/2-inch threaded, matching standard residential steam piping configurations.

Key Features

• Cast iron heat exchanger with aluminized and stainless steel burners for long service life
• 82% AFUE with 138 MBH AGA input rating and 113 MBH DOE heating capacity
• Factory-installed probe-type LWCO, steam pressure gauge, and 15 psi safety relief valve
• Built-in draft diverter and vent damper support horizontal venting through a 6-inch flue collar
• Electronic intermittent ignition system eliminates standing pilot
• Insulated jacket, flame rollout switch, blocked vent switch, and drain valve included from the factory
• Metal section connectors resist chemical degradation and extend boiler section life

Compatibility

Designed as an OEM-style floor-mount cast iron steam boiler replacement for natural gas steam heating systems requiring 2-inch threaded supply and return connections and horizontal venting with a 6-inch flue collar.

Installation Notes

Installation must be performed by a licensed heating contractor or plumber in accordance with applicable local codes, NFPA 54, and the manufacturer installation manual. Shut off gas supply and disconnect electrical power before any service work. The floor surface must be level and structurally adequate to support the boiler's water-filled weight. Confirm venting, gas line sizing, and system piping meet local mechanical code requirements before startup.

Technical Specifications

• Product Type: Cast Iron Steam Gas Boiler
• Gas Type: Natural Gas
• AGA Input Rating: 138 MBH
• DOE Heating Capacity: 113 MBH
• Net IBR Rating: 85 MBH
• AFUE Rating: 82%
• Radiation Capacity: 354 square feet
• Pressure Rating: 15 psi
• Ignition Type: Electronic Intermittent Ignition
• Burner Type: Aluminized and Stainless Steel
• Boiler Material: Cast Iron
• Number of Sections: 5
• Water Content: 7.9 gallons
• Supply Connection: 2-inch Threaded
• Return Connection: 2-inch Threaded
• Gas Connection: 1/2-inch Threaded
• Flue Collar Diameter: 6 inches
• Venting Type: Horizontal
• Mounting Type: Floor Mount
• Dimensions: 19.25 inches L x 28 inches W x 40.44 inches H
• Applicable Standards: ASME H, ETL (Canada and US), AHRI
• Warranty: 10 Year Limited

Standard Information

• Brand: NEW YORKER BOILER
• Manufacturer Part Number: cgs50cni-h