I'm a newbie working on my parallel inspections in the Phoenix area. As I build my assortment of tools, I'd like to ask you veterans about RESPIRATORS. My goal is to avoid illness from molds, dust, fiberglass, etc., but also avoid dangers from cheap equipment that can build up carbon monoxide. Any suggestions would be appreciated. One suggestion was to get one at Sears, but I don’t know what to look for.[:-crazy] Thanks!