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

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

Comfortflow System
* Compatible with NPE-A series units produced on or after May 31, 2014.
** Self-powered thermostats only.

Designed for both retrofit and new construction residential applications, Navien’s H2Air Kit* allows for space heating and DHW system integration between NPE-A Series tankless water heater models and a hydronic air handler. With H2Air you will have a combination appliance that can provide endless domestic hot water and continuous space heating when sized correctly.

H2Air is compatible with hydronic air handler models that require W1/W2/R terminals along with single or dual-stage thermostats†. The included Outdoor Reset Sensor provides optimum performance and efficiency for space heating.

Note: H2Air is for use with one NPE-A and one AHU only. For detailed information, refer to the AHU manufacturer’s literature to determine the proper output capacity.

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.
Suds
Kit
H₂Air™ Kit AHU Optimizer
PNBD-000001

H2Air Kit includes

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

Optional accessories

  • Plumb Easy Valves
    Plumb Easy Valve 3/4" with Relief Valve
    Part Number: (30012581A)
  • Neutralizer
    Residential Neutralizer (1 unit)
    Part Number: (GXXX001322)
    Replacement Media
    Part Number: (GXXX001323)
  • Peakflow
    PeakFlow™ Anti‑Scale System
    Part Number: (GXXX001326)

CSA P.9-11 rating

Chart
Npe sizing calculator
NPE SizingCalculator
Navien rebate finder
NavienRebate Finder
Installer locator
InstallerLocator
Product registration
ProductRegistration
Training
Training

Use our NPE sizing calculator

Navisizer logo
Select the right size for your NPE
Navisizer icon
Download the NaviSizer app

Navien Installer Locator

Find the nearest Navien Service Specialist including installers and service providers.

Installer Disclosure

Training Information

Navien AcademyGo to Calendar
In-Field TrainingFind training near you