However any type of material that will keep the hot air out and the cold air in will work.
Casement window portable air conditioner installation kit.
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The casement window a c employs a redundant support system.
The front is held up by a wood support base that you create with your own materials and place on the window sill.
Find window venting kit included portable air conditioners at lowe s today.
We recommend using plexiglas.
The back outside is held up by the metal brace called a platform assembly that you install on the house siding.
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.
How to install the fabric window seal.