Navien NHB-110 Combi Boiler Water Heater
Navien NHB-110 Combi Boiler Water Heater Review
The Navien NHB-110 is positioned as a combi-equivalent product in Navien's residential lineup, despite the "NHB" prefix typically indicating hydronic-only boilers. The 110 reflects 110,000 BTU input.
Specs: 110,000 BTU input, AFUE 95% (condensing), modulating burner. When paired with an indirect water heater tank, the combination delivers both space heating and DHW. Stainless steel heat exchanger, PVC condensing venting.
The 110K BTU class is sized for smaller homes (1,200-1,800 sq ft) with moderate hydronic space-heat demand. The NHB-110 alone is hydronic-only; with an added indirect tank (typically 40-50 gallons), the combination provides DHW similar to a true combi.
About $5,500-$8,000 installed for boiler-only; add $1,500-$2,500 for indirect tank in a paired install. Right buyer: small home replacing aging atmospheric boiler with high-efficiency replacement, optionally adding indirect tank for DHW.