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Navien NHB Series User Manual

Navien NHB Series
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9About the Boiler
1.4 Components
The following diagram shows the key components of the boiler. Component assembly diagrams and particular parts lists are included in the
Appendixes.
Intake Air
Air Intake Pipe
Exhaust
Optional Heating Return
Fan & Motor Assembly
Dual Venturi
Gas Pipe
PCB
24V Power Transformer
Power Switch
PRV-Air Vent Connection
(Optional Heating Supply)
Condensate Outlet
Mixing Chamber
Igniter
Flame Detector
Fire-Tube Type
Heat Exchanger
ASME Name Plate
Front Panel
APS
Gas Valve
Gas Inlet
Condensate Trap
(Siphon)

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Navien NHB Series Specifications

General IconGeneral
TypeCondensing Boiler
EfficiencyUp to 95% AFUE
Fuel TypeNatural Gas or Propane
Vent TypeDirect Vent
Vent Diameter2" or 3"
Heat Exchanger MaterialStainless Steel
Water Connections3/4" NPT
DimensionsVaries by model
WeightVaries by model
Warranty5-Year Parts

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