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  1. #1
    Join Date
    Sep 2007
    Location
    Just North of Dallas, Texas
    Posts
    97

    Newby Question about Desuperheaters

    Since I don't do HVAC work for a living I though that I would turned to the more learned folks on this site to ask a question....

    I see Desuperheaters used on Geothermal HVAC systems. Why couldn't one be installed (option) for regular HVAC systems? I would think it would help remove the heat better and use some of that heat to preheat/heat DHW (especially down in the south).

    Just a thought ....

  2. #2
    Join Date
    Jul 2006
    Location
    NW burbs of Detroit
    Posts
    6,058
    I have yet to see a de-super heater on a split system unless they just arent showing them in the component break down.

  3. #3
    Join Date
    Sep 2007
    Location
    Just North of Dallas, Texas
    Posts
    97
    Quote Originally Posted by hvaclover View Post
    I have yet to see a de-super heater on a split system unless they just aren't showing them in the component break down.
    IS there any reason they couldn't be installed on a standard HVAC system?

    Would the cost be to prohibitive as Geo's seem to be a high end solution?

    I wondered why these weren't an option other than they haven't been used in the past....

  4. #4
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,328
    There used on some systems, and they do help save money on your domestic hot water needs.

    They are not cheap to install. So payback takes some time.
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  5. #5
    Join Date
    Sep 2007
    Location
    Just North of Dallas, Texas
    Posts
    97
    Quote Originally Posted by beenthere View Post
    There used on some systems, and they do help save money on your domestic hot water needs.

    They are not cheap to install. So payback takes some time.
    Been

    I've made this query to some of the local HVAC folks and I got a dear in the headlights look. So I thought that they were only available for the Geo systems.

    I may do some more inquiring and see if they cost too much to be feasible.

    I hate to waste all those Heat BTUs as it's already too warm outside as it is ....

  6. #6
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,328
    Its not common thing. Atleast not around here.
    So the contractors you have been talking to may never of heard of one, let alone seen one.
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  7. #7
    Join Date
    Sep 2006
    Posts
    1,253
    Do they only work when the heat pump is in cooing mode? What impact would installing one have on the heat pump manufacturer warranty?

  8. #8
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,328
    They work in heat or cooling. Atleast the ones I worked on did. Haven't worked on one in awhile now.
    They have a limit switch that shuts them off, if the discharge temp gets too low.

    Should always call, and verify with the manufacturer before installing one.

    I've never been asked by any manufacturer if the system had a desuperheater on it. When I returned a part for warranty.
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  9. #9
    Join Date
    Feb 2007
    Location
    out in the country
    Posts
    633
    I have only seen one in mylife time mounted on a conventioal Heat Pump.
    It was mounted outside and had frozen and busted, I could not believe someone would mount it outside in our climate.
    I never let schooling interfere with my education... Mark Twain

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