Allows all NPE and NPN series models to control an external pump through the internal PCB.

Designed for NPE-A, NPN-U and NPN-E series. Allows for combined space heating and domestic hot water when paired with a recirculation pump (ComfortFlow™ on NPE-A). Only works with AHU’s.

Designed for NPE-A. NPN-U and NPN-E series. HotButton™ kit allows manual operation of a recirculation pump (ComfortFlow™ on NPE-A). Includes an add-on PCB, 1 push button and wall plate.

"Extra push button for use with HotButton and extra wall plate.

Extra wall plate for use with HotButton and extra HotButton push buttons.

This add-on accessory will enable customers with smartphones and tablets to control temperatures remotely, access usage data and receive diagnostic notifications on all Navien products (NPE-A, NPE-S, NPN-U, NPN-E, NCB-E, NFC, NFB, NFB-C NHB). Additionally, recirculation activation can be scheduled for any hour of any day on the NPE-A...an industry first.

NaviLink cable. Allows you to expand your NaviLink control to a maximum of 3 channels for monitoring 3 banks of 8 units. Requires NaviLink Control. Works with NPE, NCB and NHB series units.

Anti-Scale system designed to treat hard water. Installs on the DHW cold inlet supply.

PeakFlowE™ Replacement Media Cartridge.

PeakFlow™ Replacement Media Cartridge.

3/4” lead free isolation valves with relief valve designed to work on NPE, NPN and NCB series units. Allows for easy and quick servicing of DHW systems.

Required to cascade and common vent NPE, NPN, NCB, NFC, NFB, NFB-C series and NHB-110 & NHB-150 models.

Ready-Link® Rack (V3) Base. The free standing rack system is designed for infield assembly for indoor and outdoor installations. Designed to work with NPE, NPN, NCB, NFC, NHB and NFB series units. Base rack allows installation for up to 2 units back to back.

Ready-Link® Rack (V3) Add-on. The add-on rack is designed to expand the base rack system allowing up to 16 units back to back on a free standing rack system. Designed to work with NPE, NPN, NCB, NFC, NHB and NFB series units for infield assembly for indoor and outdoor installations.

Designed for use with NPE series water heaters. Allows users to adjust temperature and set the timer for the recirculation activation on NPE-A models.

Designed for use with NPN series water heaters. Allows users to adjust temperature, set operational settings, and display operational info.

Designed for NPN-U when installing unit outdoors. Required for NPN-U outdoor installations.

Pipe cover designed to hide gas water and power connections for an elegant, clean look. Works with NPN-U and NPN-E units.