Measure the room
Use a separate PM2.5 monitor if you are guessing. App city averages do not tell you what you are breathing in bed.
Smoke Season
Northern Thailand Smoke Season
Protect the room first. Then use monitoring, masks, purifier sizing, and daily protocols to reduce exposure without guessing.
First room Bedroom or main work room.
First metric Measured PM2.5, not smell or sky color.
Boundary Exposure-control guidance, not medical advice.
Filter and seal
Run a properly sized purifier where you sleep, seal obvious leaks, and verify the result during bad outdoor air.
Control outdoor exposure
Use fitted respirators, time outdoor movement carefully, and avoid hard outdoor training when PM2.5 is elevated.
Find the weak point in your room setup
The room grader turns purifier sizing, room sealing, PM2.5 monitoring, CO2 awareness, mask readiness, and daily protocol into a practical score.