New custom home build, need feedback

Discussion in 'Tankless Water Heater Forum' started by Danny Soroudi, Jul 1, 2017.

  1. Dana

    Dana In the trades

    Joined:
    Jan 14, 2009
    Location:
    01609
    It looks to me like 1-1/4" iron up to the tee to the right-most tankless, with a short run of 3/4" to the one on the left:
    [​IMG]

    A pair of 199K burners can still be served with up to 40 "equivalent feet" of 1-1/4" plumbing (counting the equivalent lengths of every tee, ell and valve along the path in that 40' total):

    [​IMG]
     
  2. Jbrk

    Jbrk New Member

    Joined:
    Oct 20, 2019
    Location:
    Toronto
    I'm more impressed with the 1-1/2"? Water supply line coming in to the mechanical room.

    My personal advice is to always upsize your gas main as high as possible. Ie when calling the gas service to run a new line, think of every possible gas appliance you could use in the future, and you'll get a nice 1-1/2" supply line and outlet off the meter.
     
  3. Jbrk

    Jbrk New Member

    Joined:
    Oct 20, 2019
    Location:
    Toronto
    Next question after reading the entire thread:

    Why aren't there 40gal tanked units that have 199btu variable gas valves?

    I like tankless the practical use of endless hot water.

    I like tanked because it's more reliable.

    What am I missing here?
     
  4. Dana

    Dana In the trades

    Joined:
    Jan 14, 2009
    Location:
    01609
    What you're missing is the HTP Phoenix series (in particular the PH199-55, a 55 gallon water heater with a modulating 199K burner.)

    A 199K burner on a tank is usually way overkill for most houses. A standard 2.5 gpm shower draws less than 90,000 BTU/hr, and 199K burner keeps up with a pair of those forever (or at least until the gas company turns off service because of the enormous bill being in arrears. :) )

    Most homes do just fine with Phoenix Light Duty ( light duty only in comparison to the bigger burner commercial water heaters), with a modulating 76K burner. The PH76-50 is the 50 gallon version, more than enough for houses that don't have big spa tubs to fill, or super-deluxe his & hers dual showers with two gusher rain heads and multiple side sprays. It keeps up with a single 2 gpm low flow shower forever.

    In the US the big orange box store carries the Westinghouse branded version of Light Duty. It's the same hardware, different label, different sales & warranty support. The Westinghouse tech support line rings at HTP's headquarters.
     
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