3 9 out of 5 stars 669.
Crank window air conditioner adapter.
We recommend using plexiglas.
You can see how one homeowner did it in the video below.
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This would also work if you want to install an air conditioner in a sliding window as well.
Open the window and set the air conditioner a minimum of 5 feet away.
I came up with an easy way to mount the exhaust vent to my crank casement window.
However any type of material that will keep the hot air out and the cold air in will work.
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Simply screw it to the inside of the screen frame and add a piece of foam t.
This method uses the window vent insert that comes with the portable air conditioner coupled with a piece of rigid foam or plywood to block the rest of the window.
Although most portable air conditioners come with a traditional window kit you can absolutely fabricate an insert to fit into the casement window allowing you to vent your portable air conditioner.