Here is a easy to make removable window vent unit that provides unbelievable comfort in all but the hottest weather. Inside air is completely changed every few seconds.
Fan is 20 inch (approx 40$). Ply is 1/4 sheet 5/8 cdx (approx 14$). Ply is measured so it slides in one end and just clears on opposite.
Plywood is primed/painted – edged with Gorilla Tape (8$ roll). Fan bracket is snipped/smashed/taped and used along with short pieces of tape/encased strap iron to hold fan.
I figure this thing saves at least 50$/month in ACX electric – and, It’s better. If you can put it in a window where sound is remote, all the better. (security concerns would have to be individually custom/addressed)
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Nice. Clean design, works well, looks professional.
Beer was created so carpenters wouldn't rule the world.