NHB Series

High Efficiency Condensing Heating Boilers

Navien NHB Series High Efficiency Condensing Boilers for Residential Applications

All Navien NHB boilers have Navien’s advanced burner system.
The industry’s largest turn down ratio means easier installation with
multiple zones while maintaining high operational efficiencies.

  • Much more energy efficient than old fashioned boiler systems
  • The highest energy efficiency in the industry — up to 95% AFUE
  • Energy Star certified
  • Backed by the industry’s strongest warranty — 10 years on heat exchangers
  • Takes up about 80% less space than traditional floor standing boilers
  • Longer lasting than tank boilers
  • Easy to use control panel
  • Elegant, clean appearance
  • Improves resale value
  • Ideal for replacements or new construction
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Innovations make Navien condensing heating boilers the best choice for homeowners

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Dual stainless steel heat exchangers last longer than copper
heat exchanger
Condensing technology reduces energy consumption and greenhouse gas emissions
heat exchanger
Optional NaviLink™ Wi-Fi control system gives you access to your Navien systems from anywhere in the world

Protect the environment as you add value

Navien primary condensing stainless steel heat exchangers recover extra heat that would be lost in non-condensing tankless heaters to reduce energy consumption and CO₂ emissions. That keeps exhaust temperatures very low — so low that economical Schedule 40 PVC pipe can be used for venting in almost all applications.

The ultimate in energy efficiency

Navien condensing combi-boiler technology provides up to 95.0% AFUE, recognized by Energy Star as Most Efficient. These extremely efficient and eco-friendly units provide extra energy savings over a traditional floor standing boiler and storage tank.

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