The Navien NHB Series is a premium high-efficiency condensing boiler designed to deliver exceptional whole-home hydronic heating performance. Engineered for reliability and long-term efficiency, the NHB provides powerful, consistent heat output for a wide range of home sizes—all while taking up a fraction of the space of bulky, traditional floor-standing boilers.
With its lightweight wall-hung design, advanced burner technology, and industry-leading efficiency, the NHB frees up valuable space, reduces energy use, and ensures your home stays warm and comfortable all winter long.
Ultra-high condensing efficiency
Stainless steel primary heat exchanger
Low-profile, wall-mounted design
PVC, CPVC, Polypropylene venting options
½” gas connection compatibility (length varies by model)
Advanced control system for precise temperature management
AFUE up to 95% depending on model
Heating BTU/H output range (varies by model):
NHB-55, NHB-80, NHB-110, NHB-150
Approx. 8,000–150,000 BTU/H
| Select Model | NHB-55H – Ideal for homes up to 1400 sq. ft, NHB-80H – Ideal for homes between 1400-2000 sq. ft, NHB-110H – Ideal for homes between 2000-2400 sq. ft, NHB-150H – Ideal for homes above 2400+ sq. ft |
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