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  1. #1
    Join Date
    Jun 2008
    Posts
    15

    Window Unit Oversize?

    Hey guys, my room mate is looking to buy a window unit for his room and he is asking why he shouldn't over size it. I told him that it will short cycle, which will not dehumidify, drop efficiency, and the unit won't last as long. He's wondering if he just drops the tstat to like 60 or something the unit won't pull down to wouldn't that work just as well? I'm not a 100% but I think the evap will freeze if there is no off cycle but I want to give him the correct answer. I'm still a student and still learning. Any help/feedback is much appreciated. Thanks
    Justin in Michigan

  2. #2
    Join Date
    Feb 2008
    Location
    Western NC
    Posts
    2,504
    buy one and put it in. They're cheap enough to break.
    I fully support the military and the War on Terrorism.


    If you don't know, then don't do. If you don't know and still do, then be prepared to pay someone else a lot to undo what you did and then do it right.

    If you do know, then do. But do it right. Otherwise, you may not be doing it long.

  3. #3
    Join Date
    Jun 2008
    Posts
    15
    Well I was really hoping to hear what would happen if he ran it all the time. 150 for the window unit is cheap but not for college students...

  4. #4
    Join Date
    Apr 2007
    Posts
    6,285
    Pretty safe bet that if it ever got to 60 degrees it would freeze over.....if it could only get it to 70 or so and not any further down then it might not.

    If you want to convince him not to oversize show him how much the weigh for each size

  5. #5
    Join Date
    Feb 2008
    Location
    Western NC
    Posts
    2,504
    window units are great to keep the air moving. Don't depend on it to cool the room to set temperature.

    I wouldn't recommend using it all the time either. Hook it up and only use it when your in the room to keep it from getting too stuffy and hot.

    Just like anything else, it can freeze up. As far as short cycling....gonna be hard unless you can find a 10 ton window unit. But if he doesn't know any better.....then make something up.
    I fully support the military and the War on Terrorism.


    If you don't know, then don't do. If you don't know and still do, then be prepared to pay someone else a lot to undo what you did and then do it right.

    If you do know, then do. But do it right. Otherwise, you may not be doing it long.

  6. #6
    Join Date
    Nov 2004
    Location
    North Carolina
    Posts
    443
    A little oversized on a window shaker won't hurt anything. Running all the time won't hurt it either. If he's in college and dumb enough to set the stat at 60 degrees and it freezes up - hmnn ???

    Why is it that 90% of people think an air conditioner will get cooler faster if they drop the thermostat way below the desired temp? The thermostat has nothing to do with capacity. It tells the unit when to start and stop and nothing else.

  7. #7
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,174
    An air conditioner won't freeze the coil because its running 24/7.
    The coil will freeze if its temp drops below waters freezing temp, weather it runs 5 minutes or 24/7.
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