Navien 30017407A Navi-link Conversion Kit, NHB series
 
NaviLink makes it easy to communicate with your Navien systems anywhere internet service is accessible.
The NaviLink module attaches easily to any new or existing* Navien tankless water heater, combi‐boiler and boiler.
Existing installations may require the purchase of a new main PCB and front control panel.
This conversion kit allows NHB-series boilers manufactured before March 22, 2016 to be compatible with the NaviLink wireless controller.
Works with NHB series units.
3 year warranty from date of purchase.