We spend up to 90% of our days indoors, so monitoring air quality is crucial for our health. (From 2019)
I got in touch with Shelly Miller, an air-pollution researcher at the University of Colorado in Boulder who also happens to own an Airthinx. We showed each other our dashboards on our phones. She looked at mine and told me that a score of 10 for particulate matter is still too high. I didn’t mention that I’ve gotten numbers as high as 500 when cooking burgers on my gas stove.
I took screenshots of both my Airthinx numbers and the Awair monitor, and then I turned on my bagless, HEPA-filtered Dyson stick vacuum. I ran it over my rugs and watched in horror as the canister filled with what looked like fine gray sand. When I was done, I checked the numbers again. Not only had vacuuming not spiked the PM level, but my overall air quality number improved.
It was only later, when speaking with William Fisk, an indoor environmental researcher at Lawrence Berkeley Laboratories, that I believe I found the cause. While telling him about my newly-installed kitchen window exhaust fan, he interrupted me. If I ran the exhaust fan all the time, he says, I could lower the air pressure in my apartment.
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