Particulate filters will help only part of the time. It is common to have sulfer compounds and nitrogen oxides along with the soot and dust. I saw a listing for a complete human portable air supply system in a police and fire supply catalog yesterday. Face shield, hard hat. hose, filters, fans, smart power system, NiMH batteries, and charger for under $1,200. I would have to get something like that for Charleston, WVa the last time I was there or Keeler, California.