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Where to buy air filters?

  • Last Updated:
  • Jun 1st, 2018 6:17 pm
[OP]
Member
Dec 15, 2007
440 posts
130 upvotes
Quebec City

Where to buy air filters?

Want to build a air purifier with a box fan, where do you buy your air filters? size: 20x20x1 merv rating of atleast 6
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