|Forum topic by MitchG40||posted 01-24-2014 09:18 AM||630 views||0 times favorited||5 replies|
01-24-2014 09:18 AM
Hello all. I am brand new to this site (as a registered member). I’ve seen much discussion about shop air filtration and LOVE some of the DIY units I’ve seen you guys put together. I have an idea for air filtration in my shop and would like your experience based opinions.
So, all of the DIY and store bought air filtration units seem to either hang from the ceiling, mount on a wall, or roll around on casters. I’ve seen quite a few plans that include the use of attic fan type blowers mounted in boxes with an array of fine filters.
Here’s the question, why not use the attic space over my garage shop to house the filtration unit and then duct the return air right back down into the shop? I imagine a system using 2 attic fan blowers that would be enclosed in a box IN THE ATTIC just above the shop with the filters housed behind an unassuming grate (like a common HVAC air return grate found in your home) that is mounted flush to the shop ceiling. Then, using large capacity HVAC ducting (and a short run of it) return the air to the shop in a different location promoting circulation around the shop. The benefit here would be that in low ceiling situations (such as mine) one would not have a large box looming overhead blocking much needed lighting and potentially resulting in a knot on the head here and there.
I understand that a long run of ducting would restrict flow, but in this case I imagine using large, short runs of it. Is there something obvious that I am missing? I haven’t seen ANYONE online discuss this approach.
If I can’t find a good reason from you all NOT to try this approach,... then I will build it and share the results here.