NHB

Condensing Heating Boiler

Nhb easy

Navien innovation in a compact wall-hung condensing boiler

As the leader in condensing technology, Navien has already reinvented the water heating industry with the award-winning NPE tankless water heaters and the NCB combi-boilers. The new NHB boiler series is the next in line of innovations from Navien. All NHB boilers have Navien’s advanced burner system, an industry-leading AFUE of 95% and turn down ratios up to 15:1.

Now available in four sizes NHB 55, NHB 80, NHB 110 and NHB 150.

15:1TurndownRatio

Industry’s largest turn down ratio in the NHB-150 providing ease of installation with multiple zones while maintaining high operational efficiencies.

Nhb vents

NHB Integrated control

The integrated control provides industry leading options and features in the boiler operation parameters, including:

  • Adjustable heat capacity.
  • A timed hydronic supply water boost feature.
  • Adjustable anti-cycle timer.
  • Freeze protection.
  • Pressure LWCO with manual reset.
  • Adjustable minimum burner time setting.
  • Adjustable turn down ratio timing.
  • Outdoor reset and domestic hot water priority.
  • Adjustable outdoor temperature reset curves.
  • Field gas convertible.

Manifold Kits

Navien’s Manifold kits are ideal for hydronic space heating applications. With these manifolds, we have done the piping work for you. Both primary and secondary loop manifold kits are designed to work on all NHB models for fast and clean installations. All you need to add is your own appropriately sized pump

NHB Primary Manifold KitGFFM-MSOZUS-001
NHB Secondary Manifold KitGFFM-SKTZUS-001

Cascading up to 16 units and
common vent up to 8 units

Cascaded Units

Navien’s two largest condensing boilers, NHB-110 and NHB-150, can be cascaded and common vented

With our cascading technology, when a unit gets up to 80% capacity determined by the supply and return temperatures, the next unit will enable to help meet the hydronic space heating requirements.

This hydronic space heating requirement and demand ratio will continue until all units are generating the needed hydronic space heat up to the maximum cascaded capacity. The Navien cascading system also balances out the workload of each unit for longer life. The NHB is dual certified for single and 2-pipe venting applications.

NHB Models

NHB-55
NHB-55
Max Input: 55,000 BTU/H
Indoor wall-hung
Residential/Commercial
NHB-80
NHB-80
Max Input: 80,000 BTU/H
Indoor wall-hung
Residential/Commercial
NHB-110
NHB-110
Max Input: 110,000 BTU/H
Indoor wall-hung
Residential/Commercial
NHB-150
NHB-150
Max Input: 150,000 BTU/H
Indoor wall-hung
Residential/Commercial
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