Title: Doesn't close
Product review: Since it vents straight down, you can't use a vent with a gravity operated damper (like your dryer). This one has a damper with a weight on it. Pretty smart - if it closed all the way to keep out cold and bugs. Found one at Lowe's with a spring operated split damper that was air tight, has a detachable grate I painted to match the trim, and was only 10 bucks.
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