My room has the following window:

enter image description here

My room becomes extremely warm whenever the day is sunny (the window is facing the south) and the outside temperature is a bit warn (> 60F/15C). Yesterday for example, my room temperature was over 88F/31C most of the day, despite opening the windows at night and the outside temperature being 70F/21C. Even when outside temperature get colder (I live in Massachusetts and temperatures may vary a lot from day to day, or even within the same day), it takes many hours for my room temperature to get lower.

Opening the windows during the day don't help, because the window opening is tiny and as you can see in the picture it opens to the bottom (which means the cold air from outside cannot enter the warm room, since cold air goes down and warm air goes up).).

Is there anything that can be done to make the room temperature lower?

My 5 ideas so far:

  1. Turning on the air conditioning: this isn't possible (quote from the building house manager where I rent the room: "We are still a couple weeks away from the building wide turnover. It has to be a complete Heat to AC Switch in our building (Heat turned off, Chillers turned on), so we have to wait until risk of cold days/nights are behind us."). I also cannot cut the window to install an AC.
  2. Placing some "air pump" on the window, i.e. some pipe measuring one or two meter that would go from outside to inside through the window. Does such things exist? The only items I could found so far were window air conditioner, e.g.:

    enter image description here

    However, since the outside air is not that warm I don't need to isolate the window: a simple pipe flushing some air from outside to inside would be enough (the pipe doesn't need to cool the air).

  3. Adding more curtains, as it shown below: it helps a bit but not that much.

    enter image description here

  4. Placing some heat control window films to the window. I haven't tried it yet, I don't know to what extent it would reduce the heat. Should I expect some significant improvement with it?

  5. Adding some external window shutter. I'm not allowed to do so:

    enter image description here

  • Given that you're not allowed to modify anything, VTC as off-topic. The solution is to run a fan though.
    – mmathis
    Apr 19 '17 at 15:50
  • @mmathis I am allowed to modified some things, e.g. placing films on the window. Apr 19 '17 at 15:56
  • @mmathis disagree. He has options within the realm of home improvement. For instance there are A/C units specifically designed for this situation, I used one in a server room in a leased building where it was not possible to install sufficient A/C. Apr 19 '17 at 16:22
  • @Harper fair enough, flag retracted
    – mmathis
    Apr 19 '17 at 16:31
  • 1
    One of these: doityourselfrv.com/diy-air-conditioner
    – CactusCake
    Apr 19 '17 at 20:07

How about getting a Portable Air Conditioner - these can be moved room to room as long as you have a window you can feed the exhaust out. The link I provide in the example below shows two types of A/C units make sure you get the Portable Unit and NOT a window unit - they are different animals altogether.

Or you could buy a fan and place in front of that window.

Example of Portable Air Conditioner (more examples on Amazon):

enter image description here


It's a college, right? Does it have an architecture department? I'd walk through there and talk to random folks or hit their library for best practices in that case. Or perhaps a nearby school that has one... the general public is usually allowed access to halls and specialty department libraries (main libraries, no). You might also ask their facilities department if they have any ideas.

Now if you just need to hasten the changing of air, a fit-to-window fan may do the job. They make commercial units, but you can also do the old trick of "fit a piece of plywood, cut round holes and bolt 5-inch muffin fans to it".

Otherwise they make proper A/C units which allow ducts to be attached to condenser in/out. Obviously you want to dump the hot air overboard, but you might also try to intake the condenser air from the cooler outside, as A/C is very efficient when condenser input is cool.

You also might think about a unit that allows ducting of all 4 inputs/outputs so you can reverse it into a heat pump if you have a cold night.

  • I take it that the picture of the window A/C is not one of your windows. If it was you could just turn it on.
    – d.george
    Apr 19 '17 at 17:02
  • @d.george that's right, the picture of the window A/C is not one of my windows. Apr 19 '17 at 18:45

Place a small pedestal fan so that it blows on the opened window pane, and close the room door and any other room openings.

The fan will force room air out the lower opening, lowering the air pressure in the room, and drawing outside air in through the upper opening.


Looking at that window, it's possible it can be detached--probably some clips along the metal arms that hold it in. This is so the outside window can be cleaned from the inside.

If it can't be removed completely, it can at least be adjusted so that it's not as in the way as before.

From there, a bidirectional window fan can be installed to help circulate air. It got me through my Massachusetts college time!


picture of fan to stop having to click through

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