Discount RPS Magnetic Central Air Conditioning Vent Cover - 3 Pack

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As noted in previous reviews, these air vent covers aren't magnetically strong enough to cling to an air vent with air coming out of it. Hell, I couldn't get them to stay on even then the air wasn't blowing, much less when it was blowing.

For air returns, these would probably work okay if the magnetics were strong enough to hold it to the register.

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If you are using it for floor vents, it is fine, but I have a vent on the ceiling and it does not stay up.

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The problem is that when packed three together, the magnetic fields are weakened. I found two covers placed with the right polarity stick to a ceiling vent better. You also need to cut them to the vent size to reduce weight.

It's a good idea but the solution needs refinement.

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Unfortunately, these cover are not magnetic enough to support their weight in a vertical position, which is what I bought them for.

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All the prior reviews are acccurate and these don't work as advertised for the purposes of covering wall vents. However as weak as these magnetic covers are they can potentially work for you. Here's the solution I found that works ok:

1) First make sure to cut them exactly to size...the smaller the better as this allows them to hold their own weight much better.

2) Double them up. After you cut it to size use 2 covers back-to-back on wall vents. They will hold this way.

If all else fails you can always use those mini-magnets which are obscure and powerful enough to hold these up and get the job done.