Lochinvar Noble NKC

The Lochinvar Noble NKC brings commercial pedigree to a more accessible price point. At 95% AFUE with output up to 285,000 BTU, this fire-tube condensing boiler handles larger Nassau County colonials and multi-zone applications. CON-X-US connectivity allows remote monitoring and diagnostics—valuable for second homeowners or property managers.

American manufacturing in Tennessee ensures consistent quality and domestic parts availability. The fire-tube design pioneered by Lochinvar provides exceptional efficiency and durability.

The 15-year heat exchanger warranty matches the flagship Knight, providing confidence in the long-term investment. Modulating operation eliminates the short-cycling that wastes fuel in oversized installations.

Best suited for homes exceeding 3,000 square feet with multiple heating zones. For smaller applications, the Lochinvar Crest provides entry-level access to the brand.

Our recommendation: The Noble NKC is ideal for homeowners who want Lochinvar's commercial quality without the Knight's flagship pricing. Perfect for larger multi-zone colonials and small estates.

Condensing boilers like the Noble NKC reach their rated efficiency only when return water runs cool enough to condense flue gases. We check your radiation and design water temperatures so the unit actually condenses in your home, not just on the spec sheet.

Every Lochinvar installation starts with a free in-home assessment covering the heat-loss calculation, venting and chimney condition, and gas or oil supply sizing. Learn more about our boiler installation process, or see current rebate and incentive programs that may apply.