Last month I wrote about impact the wildfires in Canada had on the air quality at my home. Last week there was another occurrence in which the air patterns changed to bring the smoke pollution back toward us and this time I had in place an indoor Airthings Pollution Monitor that provides PM2.5 readings. What I saw is that the outdoor smoke pollution definitely affects the quality of the air in the second floor of our condo, and therefore I think the monitor can provide indication that the outdoor pollution is worse. We didn’t have the windows open and it wasn’t so hot outside to cause our central air conditioning to run more than normal, but obviously the house is not hermetically sealed and we did open doors to go outside. What I don’t know is what to do when the air gets bad? I am thinking get more internal air circulation, either with floor fans or the fan in our HVAC or buy air purifiers.