Others Cheap Air Filtration for Your Shop – YouTube diy projects ⋅ November 30, 2018 Use a box fan and furnace filter as a cheap alternative to expensive air filtration systems. Bookmark(0) Please login to bookmark Username or Email Address Password Remember Me No account yet? Register Do you have 10 seconds? Show this DIY to your friends and fans. Report Content To report this post you need to login first. No comments Leave a Reply Cancel replyYou must be logged in to post a comment.