Accord AMAGCOV815 Magnetic Vent Cover, 8-Inch x 15-Inch, 3-Pack

I read several reviews before purchasing these and wasn't quite sure I'd be satisfied. The reviews were all over the board from 5 stars all the way down to one. Let me just say this, people (in general) must not be very bright.These magnetic vent covers work very well when you think about how magnets work. They need full contact to stick. Most if not all air vents have a small lever that sticks out and allows you to open and close your vent.If you desire to fully cover the entire metal frame, you WILL need to make a small cut out to allow this lever to pass through the cover and provide a flat sealed surface. If you do not do this, the magnet won't fully attach, and the weight will make the cover fall to the floor.Sometimes the magnetic vent cover will be to large for your vent. Again, magnets work when they are in full contact. If you have excess it will cause too much weight, and make the cover fall to the floor.Finally, some people claimed that when the air was blowing, the magnet came off and fell down. Remember I said that most if not all air vents came with a lever that closes your vent?. Close your vent before using these magnetic covers.OK, so now that the troubleshooting section of my review is over, let me tell you what I think of these covers.First of all, as with everything available through Prime, they arrived swiftly via USPS., meaning they were curved a bit from being jammed into my mailbox. This did not affect them. By the time I walked from my mailbox to my house and opened the package, they were flat again. Although, mine hadn't been in the box very long. If you left yours in the mailbox, and they were curled, or bent, that would affect their ability to fully connect magnetically. Flatten them with something heavy before using.I had ordered mine a bit large, because I like to make refrigerator magnets. I trimmed them down to the size of my vents, (the air WAS blowing at the time) pressed it down to make sure I had good contact, and haven't thought much about them since. I live in a multilevel home, and in the summer, the upper levels are much warmer than the bottom. I needed to cover the bottom level vents to redirect the cooler air to the upper floors. My husband and I were out for a few hours, and by the time we got back, the temperature was completely regulated.I plan to buy more this winter, because we have the reverse problem when heating, and have many more vents on the upper floor.Very very satisfied.

I moved in to help my elderly mother. She insist on keeping the heat up full blast. This has been a godsend. You place it on the vent and it blocks the heat. But if there's a cold spell, it's easily removed.

The first sentence in the listing description states: "Work with wall and ceiling registers..".Further down the listing description states: "These magnetic covers are ideal for additional airflow control on floor and wall registers.". Note ceiling is missing from the last sentence of the description. Clearly there is some confusion over just how these crafting magnets should be marketed.The short.... magnet is far too weak for any uses stated. End of story. Don't waste your time or money on these for the advertised use.The magnet is too weak to stay on the ceiling mounted vents. I only discovered this important fact after cutting all of the pieces to fit perfectly. The moment someone opened or closed a door these fell off with the slightest change in air pressure. They wouldn't seal well to begin with. The mostly recessed screws were enough to make the weak magnets not attach. Why these are advertised as suitable for ceiling use is beyond me.In the end I had to use double sided tape to properly secure them. Of course the joy of removing the tape and residue awaits me once the need for AC arises in the spring. I absolutely hate wasting any material. Therefore I shall glue on a slightly stronger magnetic strip around the parameter and down the center of these to avoid wasting a product which requires a ton of energy to produce.Hopefully others with wall and ceiling mounted registers will read the reviews and Q&A sections (I'll be posting a comment there as well) before making the same mistake I did.Had they not claimed these were suitable for wall and ceiling registers a five star review would have been granted. Sadly their advertised claim is false. The magnet is too weak for the advertised. Look further to find proper magnetic sheets for wall and ceiling mounted registers.I also found using these on the floor mounted heat duct register failed as well. The moment the furnace kicked on the sheet flew away.These are only suitable for crafting purposes... ie printing or mounting photos on them. Cutting them to make refrigerator mounted photo frames children can color and draw on.Cheers!

These covers work okay. I bought a 3-pack to cover two different wall vents, and have a spare. One of the vents is factory painted and the magnet sticks to it reasonably well, but does not really cut sound that much, which is what I hoped it would do. The other vent has a couple coats of paint on it from painting the room a couple different times. The magnet understandably is less effective on that vent, but sticks okay, nevertheless. Both vents have levers to open / close as needed to block or have heat and it required me to cut the magnets to allow them to set flush across the vents.I agree with many reviewers that these magnets are somewhat weak, but given the type of flexible material they are made of, I don't know if they COULD be any strongerThese magnets are effective in enhancing a closed vent to block heat, but do not really reduce the noise much, so if the former is what you're looking for, these will work. Otherwise, don't expect them to quiet the air noise coming from the vent.