DIY Air scrubber #1: Ordering filters and designing

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Blog entry by jbswearingen posted 11-24-2019 02:30 AM 590 reads 0 times favorited 0 comments Add to Favorites Watch
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I ordered three 20×20x4 MERV 11 and three 20×20x1 MERV 8 filters to build what I hope will become an efficient air scrubber for my 24×24x12’ shop. I intend on eventually building two, one for each side of my shop. My filters came in a few days ago, so I designed it in Sketchup tonight.

Fan is a 220V 4-speed blower my FIL gave me from a furnace he replaced in a building; he’s an HVAC guy, so I can sometimes score good, used motors and blowers from him.

Case is much bigger than the actual blower, to accommodate the three large filters, but that’s not a problem, as I have a high ceiling and it’ll be out of the way. Over all height is 31-7/8”, width is 35”, and length is 31”. All material is 3/4” plywood.

Opening for blower isn’t drawn as I’ll fit that once I build the carcass and will then trace the blower’s exhaust onto the front face.

I hope to document this build with videos that I’ll post to my YouTube channel.

-- Semper fi, Brad

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