How to install a portable ac unit in a casement window. However any type of material that will keep the hot air out and the cold air in will work. Close the window sash against the left side of the ac. Make sure the sash is behind the metal bracket that is attached to the side of the unit.
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. Make sure the air conditioner is close enough to the nearest outlet so you can plug it in without using an extension cord. Open the window and set the air conditioner a minimum of 5 feet away.
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