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I located some home theater gear in a closet directly behind our family room where the TV is located. Now the closet, a sizeable walk-in, is getting rather warm.

How do I install a simple vent above the closet door to allow the heat to circulate out? Is it as simple as cutting an appropriate sized hole in the drywall and putting up some stock return grills? Can grills be screwed directly to the drywall and/or fastened with drywall anchors? Is there anything else to consider?

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Pics of the project area are always welcome! – RQDQ Sep 20 '12 at 16:52
up vote 4 down vote accepted

Depending on the structure, the header of the door may be load bearing and you'll be met with a solid block of wood behind the drywall that shouldn't be cut. Drill a small test hole from the inside of the closet first.

Otherwise, installing a return grill on each side of the wall is fairly simple. Leave at least an inch or two border to the edge of the return grill so that the screws are not near the edge of the drywall. And it wouldn't hurt to use some plastic drywall anchors because drywall itself will easily crumble if you over-tighten the screw.

A few tips, turn the grill so the vents face the ceiling where you cannot see into the hole. And if you can, make a second vent towards the floor since you need a source of cooler air to replace the hot air you're trying to vent out.

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+1 And a gentle airflow might help, especially if he can have both a top and bottom vent. There are some ultra quiet fans for electronics that might help (not the classic bathroom fans). – bib Sep 21 '12 at 2:02

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