I thought I would share some photos of the flow cabinet that I just completed.
It uses a locally manufactured HEPA filter that is 24" wide x 12" Tall x 12" thick.
The fan is a cheap greenhouse ducted unit that produces 735 CFM.
The cabinet measures 25" wide x 13" tall and 24" deep.
The fan is mounted internally to save space and increase efficiency.
The plywood and hardware were all leftovers from other projects. It is not pretty and looks very cobbled together but it should do nicely until I decide I need a larger one. I have not weighed it yet but I am guessing it weighs about 50+ pounds with the filter weighing 75% of the total.
The silicone sealant is not even dry yet. But once it dries I will install a high flow 2 layer greenhouse sock filter on the inlet to protect the HEPA. The fan is very powerful for its size and will suck anything that is close by right in.
HEPA filter $95.00 purchased directly from the manufacturer near by my home.
735 CFM Ducted Fan from Amazon for $50.00
All wood, glue and hardware from the junk pile $0.00
One tube of mold resistant weatherproof silicone sealant Lowes hardware $7.00
Two layer Charcoal and web sock filter Amazon $6.00
Splinters and cut up hands (priceless).
Total cost $158.00 including tax.