navien

  1. chialex

    Navien NCB-240 & common wire

    Hello experts, I have a new Navien NCB-240 water heater and I want to install a new Sensi wifi thermostat. That thermostat requires a common wire that would supply 24VAC. On the Navien I found a terminal marked CN25, it has three connectors and in the wiring diagram this terminal is marked as...
  2. vanagon

    Navien NCB-240 for this house? (photos)

    We have a small (<2000sq ft) home. It's a duplex so one wall is to another unit. All but the third floor is heated by radiators; the third floor is a separate electric system. We are considering the Navien NCB-240 combination boiler / hot water heater. We are not worried at all about the...
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