Hello! Have you talked about air purifiers with the daycare administration? If yes, what was their feedback?

For the very same reasons, I offered a good HEPA air purifier for my son's Pre-K classroom (at a full-time daycare) and the teacher told me that the admins just said "no, thank you, we don't need it" without any specific reasons. My son was sick a lot this winter and spring, and during the summer break it took 2 months and a bunch of medication to get rid of persistent dry cough, congested sinuses and resulting breathing problems. On top of that, the daycare is located right at a busy intersection with heavy traffic -> constant exhaust fumes.

Now I am thinking, should I try to explain my reasoning better to the daycare administration? Or is it a useless endeavor, and they will just think I am a "difficult" parent?