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Heating and DHW System

Combination heating and DHW system using NPE-A2 Series condensing tankless water heaters


An add-on accessory for the Navien NPE-A2 Series tankless water heater that creates a high efficiency space heating and endless domestic hot water system

Additional features of the H2Air System

  • Domestic hot water priority or simultaneous domestic hot water and heating.
  • Endless supply of DHW.
  • Adjustable outdoor temperature reset and heating set points.
  • Adjustable pump purge timer.

H₂Air™ Kit AHU Optimizer

H2Air Kit includes

  • Controller
  • 13-pin connector cable
  • Outdoor temperature sensor
  • Flow switch for domestic hot water

Optional Accessories

Npe-a plumb easy 3








Plumb Easy Valve 3/4" with Relief Valve
Part Number: (30022163A)

Navien residential neutralizer








Residential Neutralizer V2 (1 unit)
Part Number: (GXXX002212)

Replacement Media

Part Number: (GXXX001323)


PeakFlowS™ Anti‑Scale System
Part Number: (GPWC110001AC001)

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