My “new” air cleaner has now reached a state of completion. I started with a free squirrel cage fan from an old A/C unit. Then I constructed a box to house it and affixed two 16×25 electrostatic MERV 11 filters, one on each side. I am not sure how long the MERV 11 filters will last in a shop environment. From what I have read a higher MERV would be desirable, but those seem to have such a short useful life that they are not practical. Each of the MERV 11 filters has ahead of it a MERV 4 washable dust filter. This thing really moves a lot of air.
My garage shop has a 10 ft ceiling and measures about 10×25 ft. I try to collect all of the dust that I can at each tool with a commercial dust collector. However, I have found it difficult to collect dust from the band saw and the table saw throws a lot of dust when I use a zero clearance insert or a sled (and I use both extensively)
I plan to run the homemade air cleaner along with a ceiling hung PS air filtration unit and wear a N95 dust mask when working on dust producing projects.
Any comments about other things I should do to improve my dust collecting efforts and/or protect my lungs?
Finally, has anyone used one of the snorkel types of dust masks sold by one of the supply houses.
-- Rowdy in Kechi, Kansas