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Old 10-17-2010, 11:59 PM   #1
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How to insulate ceiling vents?

It seems like these probably leak a bit of air, but I cant figure out how to insulate them because of the lights. If you stuff something up there the little bulbs get so hot that it seems like it'd be pretty dangerous, putting something on the outside would be difficult and then the lights wouldn't work anyway. Suggestions? I'm also thinking I should stuff something up into the A/C, which went kaput this summer.
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Old 10-18-2010, 03:00 AM   #2
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If you mean the ones that have the rubber liners going round their perimeter, I have been searching where to get the rubber lining--looks like it fits or slides onto the sides of each vent cover.
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Old 10-18-2010, 07:45 AM   #3
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If you mean the ones that have the rubber liners going round their perimeter, I have been searching where to get the rubber lining--looks like it fits or slides onto the sides of each vent cover.
The rubber vent cover gasket has been gone for years.

The open cell gray foam gasket has been used now for many years and does a good job. When it's compressed the open cell seal themselves.

Andy
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Old 10-18-2010, 08:22 AM   #4
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We have skylights in our Airsteam, and it came with little form fitting "blankets", for lack of a better name, that you can push up into the opening to keep some of the heat out/in in extreem temps. They are thin aluminum foil cover looking things that could be easily fabricated to fit in other top vents, given you could find the material. I've also seen this type of material used in insulating cars. Just maybe an idea.
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Old 10-18-2010, 08:30 AM   #5
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It seems like these probably leak a bit of air, but I cant figure out how to insulate them because of the lights. If you stuff something up there the little bulbs get so hot that it seems like it'd be pretty dangerous, putting something on the outside would be difficult and then the lights wouldn't work anyway. Suggestions? I'm also thinking I should stuff something up into the A/C, which went kaput this summer.
Fiberglass insulation above the light fixture grill would work.

Andy
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Old 12-07-2010, 03:49 PM   #6
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I bought a "quilted" automobile windshield shade. 2 sided mylar with a bubble layer in between, about 1/4" thick. I trimmed it to the size of the vent and sandwiched it between the lens and the vent. Works well, not worried about heat because I only will use it while it is cold. 19 degrees tonight in Stone Mountain , Ga.
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Old 12-08-2010, 12:20 PM   #7
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I discovered that a plastic envelope, the bubble wrap kind, work great! It's the second size up from the smallest I think. I had one that was used so instead of tossing it I put it up behind the screen that separates the fan from the light cover and it works perfect!
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