With a proprietary, pocketed design, our cover ensures that you'll the best possible seal with your vent:
‣ Stop losing money from leaky vents that you thought were "shut off"
‣ Redirect and boost the supply of hot or cold to the rooms you actually use without having to buy costly, external magnets that other vent covers require to keep down.
‣ Silence that pesky noise coming out of your vents.
‣ Improve duct cleaning by creating a stronger negative vacuum pressure
BOOST to the rooms you need it BLOCK in unoccupied rooms SAVE MONEY- heat and cool only the rooms you use NO GAPS- The only cover that conforms to the vent damper creating a COMPLETE SEAL WARNING Not all metal vents are magnetic. Not for aluminum or high fin vents. See listing pic 7 for details