Navien PNBD-000001 H2Air Kit AHU Optimizer for NPE-A Series Tankless Water Heaters

The Navien H₂Air™ Kit AHU Optimizer (PNBD-000001) is an add-on accessory that transforms a compatible Navien tankless water heater into a dual-purpose high-efficiency space heating and endless domestic hot water (DHW) system. Designed specifically for use with air handler units (AHUs), this kit provides intelligent control of both heating and hot water delivery from a single heat source.

Compatible with the Navien NPE-A, NPE-A2, NPN-U, and NPN-E Series tankless water heaters, the H₂Air Kit integrates seamlessly with the unit's existing recirculation capabilities — including the built-in ComfortFlow™ system on NPE-A models — to enable combined space heating and domestic hot water operation.

Key Features:

• Enables high-efficiency space heating when paired with an air handler unit (AHU)
• Domestic hot water priority mode or simultaneous DHW and space heating operation
• Endless supply of domestic hot water
• Adjustable outdoor temperature reset and heating set points for optimized comfort
• Adjustable pump purge timer
• Dual water temperature control — independent set points for space heating and DHW
• Includes outdoor reset sensor for weather-responsive heating
• 3-year warranty from date of purchase

What's Included:

• H₂Air™ Controller
• 13-pin connector cable
• Outdoor temperature sensor
• Flow switch for domestic hot water

The Navien PNBD-000001 H₂Air Kit AHU Optimizer is the smart solution for homeowners and contractors looking to maximize the utility of a Navien tankless water heater by adding forced-air space heating capability — all without a separate boiler or furnace.