Get a Dylos DC1100 Pro, costs around $250 and works great. It measures particles only, not gases or radiation. A large HEPA filter in a closed room will remove

Get a Dylos DC1100 Pro, costs around $250 and works great. It measures particles only, not gases or radiation. A large HEPA filter in a closed room will remove most PM2.5 particles. That monitor will show you what's going on.