Tankless installation positioning

Discussion in 'Tankless Water Heater Forum' started by Donald Mancosh, Aug 16, 2018.

  1. Donald Mancosh

    Donald Mancosh New Member

    Joined:
    Aug 16, 2018
    Location:
    Jacksonville, FL
    Can an electric tankless system be mounted in an orientaion other than vertical. Space is such thatnmy bottom hookup can be done more effectively if the unit is turned 90 degrees.from vertical.
    Does the orientaion matter? Water in pipes are under pressure and gravity.feed.is not an issue on these as far.as I can see.
     
  2. Dana

    Dana In the trades

    Joined:
    Jan 14, 2009
    Location:
    01609
    A model number would be useful. The Stiebel Eltron Tempra installation instructions stipulate on p.5:

    NOTICE: Unit must be installed in a vertical position with the water fittings pointing downward.

    But that may or may not be true for some other product line.

    Electric tankless water heaters are fairly abusive to the power grid distribution infrastructure (particularly your own transformer). It's a very heavy but intermittent load, as heavy or heavier than the startup load on a modern central air conditioner, causing voltage & frequency disturbances on the local distribution grid (particularly when it turns on or off), that can be difficult to regulate, and can interact with the performance of other equipment tied to the grid, not just the stuff in your own house. I personally try to avoid them for these reasons. YMMV.
     
  3. Sponsor

    Sponsor Paid Advertisement

     
  4. Donald Mancosh

    Donald Mancosh New Member

    Joined:
    Aug 16, 2018
    Location:
    Jacksonville, FL
     
  5. Donald Mancosh

    Donald Mancosh New Member

    Joined:
    Aug 16, 2018
    Location:
    Jacksonville, FL
    Follow up........Rheem RTEX-18
     
  6. Dana

    Dana In the trades

    Joined:
    Jan 14, 2009
    Location:
    01609
    The RTEX-18 is 99% a re-labeled EcoSmart 18.

    This is what each looks like on the interior- it's mostly different paint & different colored plastic parts:

    [​IMG]
    ^^^^^^^^^^^^^^^^^^^^^RTEX-18


    [​IMG]
    ^^^^^^^^^^^^^^EcoSmart 18


    On p3 of the manual they indicate:

    For ease of installation and servicing, we recommend that this product be installed in an upright position with the inlet and outlet water connections at the bottom of the unit.

    They don't indicate whether there are functional issues with other orientations. EcoSmart is located in Waterbury CT- you might give them a call for clarification on whether it's simply an ease-of-installation issue or if there is anything more to it than that:

    (877) 474-6473

    A vapor lock or air bubble that exposed part of the heating element to something other than liquid water could cause it to fail. Depending on the design the odds of that type of thing happening can vary by orientation.
     
  7. Donald Mancosh

    Donald Mancosh New Member

    Joined:
    Aug 16, 2018
    Location:
    Jacksonville, FL
    Thank you.
    I called.Ecosmart who said that it could be installed horizontally. Sadly, I did not.think to ask about flat.
     
  8. Dana

    Dana In the trades

    Joined:
    Jan 14, 2009
    Location:
    01609
    Flat, as in mounted parallel to the floor, such as on a shelf, ledge or ceiling or something?

    I would expect that it should be fine, if it's not a problem to mount it rotated 90 degrees on a wall.
     
Similar Threads: Tankless installation
Forum Title Date
Tankless Water Heater Forum Opinion on installation for Rinnai Tankless? May 17, 2019
Tankless Water Heater Forum Tankless installation questions Dec 20, 2017
Tankless Water Heater Forum Paloma PHH-32DV condensing Tankless water heater installation Jan 18, 2012
Tankless Water Heater Forum Tankless WH using cistern water Yesterday at 2:19 PM
Tankless Water Heater Forum Tankless venting Jul 6, 2020

Share This Page