My father, who is a woodworker, was diagnosed with COPD a week ago. Dad is 74 and also has a fairly severe case of rheumatoid arthritis. I'm looking for woodworker-approved recommendations on how to improve the air quality in his shop so he can keep doing the work he loves for a few hours a day. His workshop is in the one-car garage of my parents' home (their car remains outside). So far during my research I've learned that he should get a decent face mask (instead of the little paper masks he has been wearing) to wear when he's cutting, sanding or finishing his projects, and that he should get a better dust collection than the one he has and also install an air filtration/ventilation system for his shop. The 3M P100 particular filter respirator mask has been recommended to me. Is there anything better on the market? And what dust collection and air filtration systems would you recommend for his situation and shop? I have heard that the dust collection receptacle should be moved outside. And do you have any other tips for him?