New Yorker CG70-FNGH Cast Iron Hot Water Boiler, 198,000 BTU, Natural Gas

The New Yorker CG70-FNGH is a gas-fired, non-condensing cast iron boiler for hot water heating. With 198,000 BTU input and a 142,000 BTU net IBR rating, it is the largest CG model here, aimed at larger homes once matched to heat loss and radiation.

The cast iron heat exchanger uses metal section connectors for long service and even heat transfer in hydronic systems. Ignition is intermittent electronic with a step-opening gas valve for smooth starts, and the boiler pairs an integrated control with thermal purge with a factory vent damper.

As a Category I natural-draft unit with a draft hood, it connects through a 7 in. flue to a lined masonry chimney or an approved metal chimney, a practical fit where an existing chimney is reused. Supply and return tappings are 1-1/4 in. NPT, the gas inlet is 3/4 in. NPT, and power is 120 V, 60 Hz, single phase.

Highlights

• 198,000 BTU input, 163,000 BTU heating capacity

• Net IBR rating 142,000 BTU for water systems

• 82% AFUE

• Category I chimney venting with 7 in. flue

• Integrated control with thermal purge and factory vent damper

Specifications

In the box

• Integrated boiler control with thermal purge

• Factory vent damper

Good to know

• Gas-fired appliance: it must be installed, vented and commissioned by a qualified installer in line with local codes and the manufacturer's installation manual.