My DIY window exhaust system :). Even though the printers are in their own room, If I print any materials other than PLA, I am more at easy to have the fans on pulling the air out. It’s a reversible window fan (not expensive). Anyone who has installed window AC before would know how to install. The fans are covered when not in use. The cover is a foam from Home Depot that was cut to size and put inside a plastic bag to prevent outside moisture from soaking it. The fastener are some big strong rubber bands (I had to split it in half lengthwise to make it less strong), also from Home Depot, that are anchored to some nails on the top and bottom of that window frame. The cover seals well. I don’t feel any draft from it. If there are foot traffics near the window, or small chilfren around, it would be wise to wrap them up in some protective stuff so they don’t snare and cut and cause injury.
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