We did have to screw two hose-end pieces into the plastic window insert—a task that required a small cordless drill (a screwdriver would also work fine). It also included caps that fit over these hose ends on the outside if you want to leave the unit installed year-round. Given how simple the set-up was, though, we weren't sure we'd actually do that. Like all the portable ACs we tested, caster wheels made it easy enough to move around.
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