$50
Transom Vornado 26 in. 4 Speed window AC unit. It fits nicely in a range of window sizes (it comes with multiple-sized foam padding). Very effective at keeping a room cool in the summer.
This is the model: https://www.homedepot.com/pep/Vornado-Transom-26-in-4-Speed-Low-Profile-Window-Fan-FA1-0136-06/314644896
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