As long as you have the garage door open and the back door open? You should have decent ventilation. I work in my basement in a very closed off section. I have a dc and a jet air filter that I run non stop. With a mask and both doors open I don't suspect you would have the need I do for a real filtration unit.
My jet air filter has a timer, when I leave the shop I let it run for 2 hours after I leave and it shuts off after the allotted time.
Paul
My jet air filter has a timer, when I leave the shop I let it run for 2 hours after I leave and it shuts off after the allotted time.
Paul