Navien Boilers

Every Navien boiler we stock on one page: heating-only condensing boilers and combi boilers that also make domestic hot water. All are wall-hung, high-efficiency condensing units.

• NHB-H: compact heating-only boilers from 55,000 to 150,000 BTU/h for most homes.
• NFB-H: fire-tube heating-only boilers at 175,000 and 200,000 BTU/h for larger homes and light commercial work.
• NFB-C: commercial fire-tube boilers at 301,000 and 399,000 BTU/h.
• NCB-H and NFC-H combi boilers: heating plus on-demand hot water in one unit. See Navien combi boilers.

Heating-only or combi?

A heating-only boiler needs a separate water heater, usually an indirect water heater run from the boiler. A combi removes the tank but has to be sized for both the heating load and simultaneous hot water use. Size any boiler from a heat loss calculation, not from the old unit's rating, and confirm venting, condensate disposal and gas line capacity before ordering.

Compare models in the Navien model comparison, or browse all boilers, condensing boilers and Navien racks, manifolds and parts.