Which air conditioner cools better? A portable air conditioner or a window air conditioner?

With having the same BTU.

4 Answers

  • elhigh
    Lv 7
    6 months ago
    Favorite Answer

    The window unit!

    In order to do its job an AC unit has to pass air over its hot coils to shed the heat it's removing from the living space.

    With a portable unit, that air comes from INSIDE your room, which the unit had just got done cooling, and then throws it OUTSIDE! Which creates a low-pressure condition inside your home, which causes warm, moist air to get sucked in through the cracks and crevices, which the unit then has to cool again. Portable units are not efficient at all, regardless of how they're rated. It may have a rating that looks pretty good, but it disregards this crucial fact of how it works, in that it wastes a lot of its own cooling power.

    Window units, on the other hand, keep their own entire hot end outside from the beginning. You lose some window space but they are far more effective.

    Neither of these can hold a candle to an even middlin-fair mini split system.

    Mini splits are available in sizes down to about that of a window unit, but the entire hot end of the system is completely outside and attached via piping, like a whole-house central split system. The noise of the outside unit is completely on the other side of the wall - not necessarily close to a window, either, since the piping goes through a hole only about 3" wide and thoroughly sealed up after installation - and the inner unit is pretty quiet, especially once it's hit the set temperature and slowed down to a maintenance level. Mini splits are available with SEER as high as 30 - no window unit has ever gotten anywhere close to that. That's air conditioning for super cheap, friends.

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  • Anonymous
    6 months ago

    No question. The window. The portables are a joke.

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    Lv 7
    6 months ago

    a portable units is a window unit...ive never seen a portable one that does not hook up tot the window

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  • 6 months ago

    A window air conditioner cools better.

    A real air conditioner has two inputs and two outputs. Inside the room it sucks in warm air and spits out cold air. Outside the room it sucks in ambient air, heats it and blows that out. A window air conditioner does this well, with one input and one output on each side of the wall. But a portable A/C has only one input. It sucks in warm air from the room and blows cold air out into the room, but then to get rid of the heat it sucks some of the cooled air from inside and blows it outside. So it's not as efficient.

    There are new portable A/C units that have TWO hoses that go to the outside, and they work better.

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