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  1. #1
    Join Date
    Jul 2019
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    4
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    Crazy, needs your support or immediate rejection

    Have a 26yr old 15-tonne electric powered HVAC unit. Recently, A/C portion has failed. No way of repair. Fan still works, heating coils still work.

    Need to provide A/C to a 1.5-2 story work space. No real money, and no means to fix or replace HVAC unit without major cash injection and taking out heritage walls, or current office construction.

    I know, horrible situation.

    Any possibility that I can get a few off-the-shelf ~15k BTU A/C units, blowing their cold air into existing ductwork (fan still works) and vent hot air into HVAC return? Can't vent through any window or wall. Trust me.

    Is this idea stupid/how stupid is this idea?

  2. #2
    Join Date
    Jan 2015
    Location
    Iowa
    Posts
    1,683
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    Send whomever is doing whatever in the workspace someplace else to do their work

  3. #3
    Join Date
    Jan 2010
    Posts
    18,707
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    Quote Originally Posted by Answer-Man View Post
    Send whomever is doing whatever in the workspace someplace else to do their work
    Truth be told here....

  4. #4
    Join Date
    Jan 2015
    Location
    Iowa
    Posts
    1,683
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    Quote Originally Posted by VTP99 View Post
    Truth be told here....
    What this is a jail or prison?

  5. #5
    Join Date
    Apr 2003
    Location
    Maple Grove, MN
    Posts
    3,272
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    Quote Originally Posted by CanStage View Post

    Any possibility that I can get a few off-the-shelf ~15k BTU A/C units, blowing their cold air into existing ductwork (fan still works) and vent hot air into HVAC return? Can't vent through any window or wall. Trust me.

    Is this idea stupid/how stupid is this idea?
    Yes, that idea is stupid. Very stupid. It's not a perpetual motion machine that we're talking about here. The heat from the condenser needs to be rejected to someplace other than the place you are trying to cool.

    What you are describing would be like plopping a window air conditioner on the table in the middle of your room. Yes, you would get cold air blowing out the front of it, but warm air blowing out the back. The problem is that there's more warm air produced than there is cool air, and the room would slowly get warmer and warmer. Soon it would become unbearable, even with the slightly cooled air blowing out of the front.

    All air conditioners need to have the "waste heat" discharged to a place where it will make no difference, which is usually outside.
    If at First You Don't Succeed, Skydiving Is Not for You.

  6. #6
    Join Date
    Jan 2010
    Posts
    18,707
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    Quote Originally Posted by Answer-Man View Post
    What this is a jail or prison?
    Only he knows, I'm just in agreement with you.

  7. #7
    Join Date
    Nov 2006
    Location
    Athens, Ohio
    Posts
    7,208
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    Quote Originally Posted by CanStage View Post
    Have a 26yr old 15-tonne electric powered HVAC unit. Recently, A/C portion has failed. No way of repair. Fan still works, heating coils still work.

    Need to provide A/C to a 1.5-2 story work space. No real money, and no means to fix or replace HVAC unit without major cash injection and taking out heritage walls, or current office construction.

    I know, horrible situation.

    Any possibility that I can get a few off-the-shelf ~15k BTU A/C units, blowing their cold air into existing ductwork (fan still works) and vent hot air into HVAC return? Can't vent through any window or wall. Trust me.

    Is this idea stupid/how stupid is this idea?
    The idea is completely impractical. Your Rube Goldberg suggestion just won't work.
    AOP Rules: Rules For Equipment Owners.

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    There = not here. Their = possessive pronoun. They're = they are
    It's = contraction of it is. Its = the possessive form of it
    Too = also. To = expressing motion. Two = 2
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    Questions should end with a question mark "?" Statements end with a period "."

  8. #8
    Join Date
    Jan 2010
    Location
    Sea to Sky
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    Do you own the building???? If not...are you leasing???

    If you are leasing, who is responsible for building capital equipment costs according to your lease agreement????



    Sent from my SM-G965W using Tapatalk

  9. #9
    Join Date
    Jan 2015
    Location
    Iowa
    Posts
    1,683
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    Quote Originally Posted by VTP99 View Post
    Only he knows, I'm just in agreement with you.
    You'd think if he really wanted help he'd provide some real information that could be used just what could be done, But go figure.

  10. #10
    Join Date
    Sep 2002
    Posts
    27,252
    Post Likes
    Immediate Rejection

    PHM
    --------


    Quote Originally Posted by CanStage View Post
    Have a 26yr old 15-tonne electric powered HVAC unit. Recently, A/C portion has failed. No way of repair. Fan still works, heating coils still work.

    Need to provide A/C to a 1.5-2 story work space. No real money, and no means to fix or replace HVAC unit without major cash injection and taking out heritage walls, or current office construction.

    I know, horrible situation.

    Any possibility that I can get a few off-the-shelf ~15k BTU A/C units, blowing their cold air into existing ductwork (fan still works) and vent hot air into HVAC return? Can't vent through any window or wall. Trust me.

    Is this idea stupid/how stupid is this idea?
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  11. #11
    Join Date
    Jan 2010
    Posts
    18,707
    Post Likes
    Sounds like he needs heat rejection

  12. #12
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    26,334
    Post Likes
    Quote Originally Posted by CanStage View Post
    Have a 26yr old 15-tonne electric powered HVAC unit. Recently, A/C portion has failed. No way of repair. Fan still works, heating coils still work.

    Need to provide A/C to a 1.5-2 story work space. No real money, and no means to fix or replace HVAC unit without major cash injection and taking out heritage walls, or current office construction.

    I know, horrible situation.

    Any possibility that I can get a few off-the-shelf ~15k BTU A/C units, blowing their cold air into existing ductwork (fan still works) and vent hot air into HVAC return? Can't vent through any window or wall. Trust me.

    Is this idea stupid/how stupid is this idea?
    You've had 26 years to budget replacement life cycle costs...……………………..

    Someone's not doing a very good job!

  13. #13
    Join Date
    Sep 2002
    Posts
    27,252
    Post Likes
    You will need a dozen 15K units. That will run about $6000. For $6000. or less I bet the old unit could be all, or at least somewhat, repaired. What is wrong with it that is impossible to fix?

    Who will be doing this work anyway?

    If it were me; maybe we could pipe in three 5 ton condensing units and add three pistons to the evaporator. <g>

    PHM
    -----------



    Quote Originally Posted by CanStage View Post
    Have a 26yr old 15-tonne electric powered HVAC unit. Recently, A/C portion has failed. No way of repair. Fan still works, heating coils still work.

    Need to provide A/C to a 1.5-2 story work space. No real money, and no means to fix or replace HVAC unit without major cash injection and taking out heritage walls, or current office construction.

    I know, horrible situation.

    Any possibility that I can get a few off-the-shelf ~15k BTU A/C units, blowing their cold air into existing ductwork (fan still works) and vent hot air into HVAC return? Can't vent through any window or wall. Trust me.

    Is this idea stupid/how stupid is this idea?
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

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