New Yorker CG70-FNGH (CG 70 DNI-G2) 198,000 BTU Hot Water Boiler

Upgrade Your Home Comfort With The New Yorker CG70‑FNGH (CG 70 DNI‑G2) 198,000 BTU Cast‑Iron Hot Water Gas Boiler

Need dependable whole‑home heat with easy service? The New Yorker CG70 is a compact, cast‑iron, chimney‑vented hot water boiler with straightforward controls and proven durability—ideal for baseboard and radiator systems. An integrated control with a fuel‑saving thermal purge routine helps trim standby losses, while electronic ignition fires only when there’s a call for heat.

• Brand: New Yorker
• MPN: CG70‑FNGH (CG 70 DNI‑G2)
• Type: Gas‑Fired, Non‑Condensing Hot Water Boiler
• Fuel: Natural Gas (LP conversion kit available on select packages)
• Input: 198,000 BTU/h
• DOE Heating Capacity: 163,000 BTU/h
• Net IBR (Water): 142,000 BTU/h
• AFUE: 82%
• Ignition: Electronic (intermittent); step‑opening gas valve for smooth starts
• Venting: Category I, draft‑hood; 7" flue to a lined masonry or listed metal chimney
• Water Connections: 1‑1/4" NPT supply & return
• Gas Inlet: 3/4" NPT
• Electrical: 120V, 60 Hz, 1‑phase
• Dimensions (W × D × H): ~34‑1/2" × 24‑1/2" × 31‑1/8"
• Included: Integrated boiler control with thermal purge, factory vent damper; many packages include a Taco 007 circulator
• Warranty: Limited lifetime heat exchanger (residential); 1‑year parts (see terms)

Reliable Cast Iron Construction

A heavy‑duty cast‑iron heat exchanger and metal section connectors deliver long service life and consistent heat transfer—ideal for hydronic systems that run for decades.

Fuel‑Saving Integrated Control

The user‑friendly control includes an energy‑saving thermal purge that circulates residual warm water before firing the burner, helping reduce fuel use and chimney losses.

Right‑Sized For Larger Homes

With a Net IBR of about 142,000 BTU/h, the CG70 is a strong match for many larger homes when properly sized to your radiation and heat loss.

Simple, Code‑Compliant Venting

This Category I natural‑draft boiler connects to a properly sized, lined chimney with a standard 7‑inch flue. That makes replacements straightforward in homes with existing chimneys.

Installer‑Friendly Layout

Clear front/side access, 1‑1/4" supply/return tappings, and an included vent damper simplify piping and annual service. Many packages ship with a familiar Taco 007 circulator to speed up installs.

Want to learn more about this hydronic boiler? Read our blog on factors to consider before purchasing a hydronic boiler, pros and cons of hydronic boilers, and hydronic boiler recommendations.