I have a problem similar to this:

How can I vent a portable air conditioner when there's no window?

I do have windows but I cannot modify them. Cutting holes in walls or any similar modifications are not allowed.

I was thinking about using a stove hood to release the hot air. Will it be a good solution?


  • 1
    Are you sure that the vent hood even goes outside? In many installations, it just blows the air back into the room...
    – JPhi1618
    May 5, 2016 at 20:36
  • That's interesting. I had had a lifelong experience with a hood that goes into a ventilation system so I haven't even thought it could be any different. What is the point of having it just circulating the air? To prevent fungi from growing? Anyway, the one I have here indeed does not go outside. Oh dear...
    – user53562
    May 5, 2016 at 20:49
  • 1
    I have no idea what the point is of even having a non-vented vent-hood, but it's shockingly common in apartments and cheaply built homes.
    – JPhi1618
    May 5, 2016 at 20:58
  • It's supposed to have a filter on it to remove smells/smoke. Still a bit useless, of course. May 5, 2016 at 21:03
  • The filters supposedly collect grease - they collect very little, and have no impact on smoke/smells. They are cheap products installed by cheap builders and cheap landlords which are basically useless.
    – Ecnerwal
    May 6, 2016 at 2:25

3 Answers 3


??? Venting a portable A/C does not require "modifying" the window at all. You open the window, insert the exhaust-hose plate, close the window onto it, perhaps stuff some foam between the upper and lower pane, and you're done, without modifications to the window...

  • I want to avoid opening the window due to significant number of insects around. Also it's outward opening so using insect nets is somewhat problematic. Nevertheless this or a similar solution seems to be the only option at this point.
    – user53562
    May 6, 2016 at 20:57

In essence you could use duct to vent the hot air going out, but you should attach it to the AC for best results. You need cool air supplied to the sides of the AC which absorb the heat and transfer it away.

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Would a cassette AC work? I think it would work for the thread "How can I vent a portable air conditioner when there's no window?", but that wasn't really the question here nor there; but I truly think it's the solution that both of you are looking for.

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They make air conditioning units with exhaust pipes for either the hot or the cold air. I once had a server room whose door was propped open 6” specifically to allow such a unit to blow air in there. Wasn't my design.

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