You can put an air filter in the room for a while and see if there’s a noticeable change. If you want to be scientific about it you can ask a friend to turn it on and off at random while you’re out of the room
You can put an air filter in the room for a while and see if there’s a noticeable change. If you want to be scientific about it you can ask a friend to turn it on and off at random while you’re out of the room