I ordered a Merv 12 box of 6 filters and was surprised that the filters weren't individually wrapped. I also had no way of knowing if I received the filters I ordered as there was no information on the filters other than the size printed on them. I haven't had a chance to know if I have Merv 10 or 12, they also seem pretty thin. I called Nordic Pure and they told me the only way to tell was from the shipping box which was supposed to contain the information. There was only a shipping label on the box, no other information about the product. These filters are cheap but I think you get what you pay for. Not sure how they will work. I probably won't buy these again.
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