Installation of a Navien 210A unit and Expansion tank needed?

Discussion in 'Tankless Water Heater Forum' started by hokieamonglions, Aug 17, 2011.

  1. hokieamonglions

    hokieamonglions New Member

    Joined:
    Aug 17, 2011
    Location:
    PA
    I am trying to get some background information on whether an expansion tank is needed when a gas tankless water heater unit is being installed.

    Currently I have a 40 gallon tank gas hw heater and investigating its replacement with a Navien 210A gas unit (in a different placement in my basement). The tank unit has an expansion tank on the cold inlet (as would I expect) but what about tankless units? Do they need them, and should I have one installed with a tankless replacement.

    Thanks,

    -hokie
     
  2. BizzyBeePlumbing

    BizzyBeePlumbing New Member

    Joined:
    Aug 21, 2011
    Location:
    Raleigh,Nc
    Yes, you will need an expansion tank if this is a closed system. tank or tankless, it does not matter when it comes to an expansion tank.

    Maybe you would like to research Noritz or Rinnai, are far better units then the one you are going to choose.
     
  3. Sponsor

    Sponsor Paid Advertisement

     
Similar Threads: Installation Navien
Forum Title Date
Tankless Water Heater Forum Paloma PHH-32DV condensing Tankless water heater installation Jan 18, 2012
Tankless Water Heater Forum Rinnai new LS94 model installation Mar 25, 2008
Tankless Water Heater Forum Help Calibrating a Navien NCB 210E - It has efficiency problems Wednesday at 1:39 PM
Tankless Water Heater Forum Is a Navien NCB-240E overkill? Oct 16, 2017
Tankless Water Heater Forum Navien 240a external recirculation settings with thermal comfort valve. Sep 24, 2017

Share This Page