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Review title: Did not work for me
Product review: They did not fit well in my vents (standard size), they were so flow restrictive that it changed the whole air distribution equation in my house and I would have had to readjust them all...after trying twice to make it work, I ripped them out and trashed them.In order to keep my air clean I rather purchased a room air purifier that does the trick beautifully (yes, more expensive.This procut did not work for me at all.
