who only by moving can balance

...part of me wonders if a request for 'plz give me access to appropriate respiratory protective equipment until such time as the environment of my path to enter / exit the building is no longer toxic to me (see health condition documentation, etc. etc.)' might get results. Especially if the price tag for the kinds of RPE needed was included (I suspect it would be considerable!)

Before you get to that point, though, there's a certain magic to taking your previously emailed complaint, tweaking it for printed letter form, adding a line to the start along the lines of 'this is a printed version of an complaint previously emailed to $disabilityservicesperson via $theiremail and $buildingmanger via $mangeremail; since then [brief detailing of lack of useful followup]. [Health consequences to you.] This situation constitutes an ongoing occupational health hazard to me because there is no other path I can enter / exit my workplace without exposure to toxicity.' etc. etc., and then add a line documenting that the people receiving a copy of this printed complaint compose not only $disabilityservicesperson and $buildingmanger, but also the boss(es) of those people, and your institutional ombudsman or any advocate-type person whose area of responsibility remotely has bearing on $peoplewithyourjobtype or occupational health & safety.

Most institutions past a certain size will have advocate-types for occupational health & safety precisely so that these type of thing can be addressed appropriately without the employee needing to bring down the hammer of an official complaint to $appropriategovernmentagency. That being said, you shouldn't shy away from making the latter type of complaint if that's what it takes — if it's a problem for you, a.) that's enough — you already have the law on your side, and your employers have a responsibility to minimize hazards to your health in your workplace as much as practicable with the type of work you do; also, b.) if it's a problem for you, it will also be a problem of some degree for other people. If a smoker wants to muck with their health by smoking, that's one thing; they don't get the right to make that choice for other people.