RobinBHM
Established Member
In this sort of thing data really helps. You can now get laser-based PM2.5 monitors for less than £50. I have this one from Uni-T, available from a variety of places such as Banggood
The amount of particulate per m3 has direct health implications. If you can clearly show that the effect is that the fire outside is producing the equivalent of someone smoking in the room (over 500 mg/m3) then that is a clear call to action.
Brilliant, really useful advice, I will have a look at those options.