navien 240s

  1. T

    Navien Water Heater (NPE-240S2 (NG)) in Constant Post-Purge Status

    I have a less than 2 year old, builder installed Navien water heater that has decided to be in a constant post-purge when it is not being used. The status alternates between POST-PURGE AND DHW-WAIT. I noticed this about a week ago as I heard a vibration upstairs and it was the water heater...
  2. steve agnew

    Navien 240S On demand hot water...in principle

    Just installed a Navien 240S, 199,900 Btu/s hr, enough for 3 simultaneous showers...or so it would seem. There is a lot more to on-demand hot water that the brochures do not mention at all, but the technology is great anyway. First of all, if you put in a big unit like the 240s, make sure that...
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