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    combine tankless flues (6 Posts)

  • keyote keyote @ 11:31 AM
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    combine tankless flues

    Ive got a rental on top floor that i have started to build with a rheem 64 tankless unit under a future stair behind the bath room. its 3/5 vent goes right out a 13" brick exterior wall. directly under  floor, below im building my own unit with another bathroom and its own rheem 64  Id like to gang the two flues together and have only one wall penetration but rheem and metal fab are just too stupid to reach or answer questions in any way that instills confidence that some idiot is reading from a script in fact they dont even answer this question and refer you to a paid  service. anyway im aware of the issues but also think ive seen this done on large commercial jobs any ideas?
  • unclejohn unclejohn @ 5:57 PM
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  • keyote keyote @ 1:14 PM
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    tankless flues

    dont see anywhere on the link the question is addressed. i realize of course they must be fan powered but  a backdraft damper might solve that 
  • HDE HDE @ 8:32 PM
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    Appliiances come with installation instructions

    Read it!
    "The water heater must be vented to the
    outdoors as described in these instructions.
    DO NOT connect this water heater to a
    chimney. It must be vented separately from
    all other appliances."
    chimney. It must be vented separately from
    all other appliances."
    "The water heater must be vented to the
    outdoors as described in these instructions.
    DO NOT connect this water heater to a
    chimney. It must be vented separately from
    all other appliances."
    chimney. It must be vented separately from
    all other appliances."
    WARNING "For multiple unit installation, a minimum
    distance between vent terminations must be maintained to
    prevent recirculation of vent gases. Maintain a center-to-center
    distance between vent terminations of 19 inches (48 cm) for two
    unit installation. Maintain a center-to-center distance between
    vent terminations of 21 inches (53 cm) for three or more unit
    installation." "For multiple unit installation, a minimum
    distance between vent terminations must be maintained to
    prevent recirculation of vent gases. Maintain a center-to-center
    distance between vent terminations of 19 inches (48 cm) for two
    unit installation. Maintain a center-to-center distance between
    vent terminations of 21 inches (53 cm) for three or more unit
    installation."

    The life you save may be your own
    This post was edited by an admin on June 24, 2013 8:34 PM.
  • RobG RobG @ 2:23 PM
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    Eternal

    Check out this link. The Eternal brand of tankless water heaters can apparently have a common vent.
    Rob
    http://www.heatinghelp.com/forum-thread/141150/Four-Hybrid-Eternals-for-a-Restuarant-photos8
  • HDE HDE @ 2:06 PM
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    So can many other tankless brands

    As long as they're serving the same domestic water system
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