The portable AC units generally have a customizable, exhaust hose window, termination kit that comes with the unit.. In other words it can be cut to fit. The one that comes with the unit will fit casement windows, as well as sash windows.
To further assist you, I have included a link to the Owner's/Installation Manual for the model you referenced. You may download and print it if you like.
http://www.air-conditioner-home.com/manuals/ac-12000.pdfHope this helped you. Please let me know. Thanks.
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