Navien NHB-80 Condensing Heating Boiler
Navien NHB-80 Condensing Heating Boiler Review
The Navien NHB-80 is a residential condensing hydronic boiler — for space heating applications, not domestic hot water (though it can pair with an indirect water heater). The "NHB" identifies the heat-pump-style boiler line; "80" reflects 80,000 BTU input.
Specs: 80,000 BTU input, AFUE 95% (condensing operation), modulating burner with 5:1 turndown ratio, stainless steel heat exchanger, PVC venting. 10-year warranty on heat exchanger.
The NHB-80 is smaller than the NHB-110 and NHB-150, sized for smaller homes (1,200-1,800 sq ft) with moderate hydronic space-heating demand. Compatible with radiant floor, baseboard, and panel radiator systems.
Right buyer: smaller home replacing aging cast-iron or atmospheric boiler with a high-efficiency replacement. Typical install $5,500-$8,000 depending on existing hydronic system. Wrong buyer: pure DHW applications (the NPE tankless series is the right Navien product), or larger homes needing 110-200K BTU class.
This is a space-heating product, not a water heater. Listing it in the water-heaters category reflects Navien's combined product line — homeowners shopping boilers and water heaters together often see the NHB line.