
Great idea! I couldn't wait to get this installation article in the mail.That way I could stop breathing in all the extra dust and everything that gets into the vents of old apartment houses.I have 4 vents that I needed to cover and decided to put them on the Install outside of each vent.It came with the perfect amount and then the filter but the problem was it didn't have the right amount of glue compared to the amount of filter cloth it came with.When I put a filter on the attaching the outside of my vents, I would need to use glue around the entire perimeter of each vent, for it to be effective, and if I didn't, the vent would burn through part of it. Filter not fully seated on the adhesive. I was only able to fully cover 2/4 of the vents, which was still inefficient when I can't cover everything based on apt's location. Unfortunately I returned because no other glue I tried to use held the filter after turning it on or stuck to the vent when the AC was on. Hopefully this issue gets resolved and then I would buy back.

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