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Thread: PTAC argument

  1. #1
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    PTAC argument

    I am considering a PTAC unit instead of having current HVAC system fitted (re-done) for central air.

    Now, I have a small home - 850 SQ FT. with a crawl meaning my furnace is a down draft. This means a little more difficulty in design and refurbish than normal.

    And, since I am renovating it would be easy to frame in to an exterior wall.
    The other bonus would be that a PTAC is self-contained only needing power pulled to it.

    The PTAC cost for a 1 Ton unit is actually cheaper by far than all the components and cost of retrofitting the original (newer and efficiant) HVAC.

    These are the (Pro's) of this idea, what would be the (Con's)? Looking for good experienced advise or thoughts.

  2. #2
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    Not enough air circulation and humidity issues are in the ptacs future...

    Sent from my LG-G710 using Tapatalk

  3. #3
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    The problem is conventional PTAC equipment is very localized as far as what it can do.
    Although ducted PTAC units are made. Very popular in dorms around here.
    I havent failed. Ive just found 10,000 ways that wont work. - Thomas Edison

    Its not whether you get knocked down, its whether you get up. - Vince Lombardi

    "In this house we obey the laws of thermodynamics" - Homer Simpson

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  4. #4
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    Well, the bigger challenge with retro-fitting is the A-coil would have to mounted under the furnace (down-draft). The condensation drain would be at the floor level and become a problem to mitigate as the crawl is difficult.
    Suggestions?

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  6. #5
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    Not hard. Its done common in mobile homes.

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  7. #6
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    Your letting your cheap gene cloud your judgement. A PTAC is not gonna properly heat and cool your home; it's gonna have a short life expectancy; it would have to be done away with if you try to sell the house; and it's gonna be objectionably noisey.

    Do you really wanna put up with a cheap motel unit?
    Bob Boan


    ​You can choose to do what you want, but you cannot choose the consequences.

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  9. #7
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    Quote Originally Posted by delamite View Post
    Well, the bigger challenge with retro-fitting is the A-coil would have to mounted under the furnace (down-draft). The condensation drain would be at the floor level and become a problem to mitigate as the crawl is difficult.
    Suggestions?
    Not difficult at all. Put the coil as high as possible and use a condensate pump.
    Easy.
    I havent failed. Ive just found 10,000 ways that wont work. - Thomas Edison

    Its not whether you get knocked down, its whether you get up. - Vince Lombardi

    "In this house we obey the laws of thermodynamics" - Homer Simpson

    Local 486

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  11. #8
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    Even most hotels are doing away with the ptacs. What does that say? Id take a ducted mini split over a ptac... Just saying.

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  12. #9
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    Thread Starter
    OK, OK ..
    A-coil being biggest obstacle, I suppose it has to be mounted underneath furnace and not possible to mount traditional on-top?
    That would make retrofitting much easier if possible.

  13. #10
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    If you have a furnace, that’s a good way to rot your heat exchanger quickly.
    I havent failed. Ive just found 10,000 ways that wont work. - Thomas Edison

    Its not whether you get knocked down, its whether you get up. - Vince Lombardi

    "In this house we obey the laws of thermodynamics" - Homer Simpson

    Local 486

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  15. #11
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    I get it.
    Thx everyone will have this job done correctly. I just like to know thing and be prepared before hiring contractors.

  16. #12
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    Quote Originally Posted by delamite View Post
    OK, OK ..
    A-coil being biggest obstacle, I suppose it has to be mounted underneath furnace and not possible to mount traditional on-top?
    That would make retrofitting much easier if possible.
    It is only traditional in an up-flow configuration. It is completely wrong to do so for a down-flow.
    AOP Rules: Rules For Equipment Owners.

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  17. #13
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    Get a ducted Mini and enjoy it!

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