As for doing fit testing at home, using cigarette smoke might be helpful: "... it was found that tobacco smoke as it comes from a cigarette is an extremely con

As for doing fit testing at home, using cigarette smoke might be helpful: "... it was found that tobacco smoke as it comes from a cigarette is an extremely concentrated aerosol with a relatively stable distribution of sizes ranging from 0.1 to 1.0 micron, peaked between 0.2 and 0.25 micron." Source: https://www.sciencedirect.com/science/article/pii/0095852260900374 https://www.sciencedirect.com/science/article/pii/0095852260...