Healthy indoor air quality
How to keep wildfire smoke out of Homes with mechanical ventilation systems?
...wildfire. To minimize exposure, staying indoors as much as possible is recommended. If building occupants must go outdoors for any reason, the US EPA recommends an N95 or P100 respirator mask with a NIOSH label. Cloth, tissue and paper masks do not provide effective protection against wildfire smoke.
wildfire smoke in...