In Nov 2018, during the Camp Fire, I was in the Bay Area and was thrilled to have an air quality tracker from Wynd [1]. It is small, but seemingly accurate (wh

In Nov 2018, during the Camp Fire, I was in the Bay Area and was thrilled to have an air quality tracker from Wynd [1]. It is small, but seemingly accurate (when comparing outdoor readings with PurpleAir[2] readings). It allowed me to identify drafts of contaminated air coming into my home and seal them up, such as the fireplace (of course) and the gap under the door to the garage. I was running a few HEPA air purifiers and within a couple hours I was at 0 AQI for the whole weekend in the whole home. I remember Monday morning all my co-workers had raspy voices. They did keep their windows shut, but even with HEPA air purifiers running, that wasn't sufficient to create a living space with clean air. You really had to have the ability to find and seal up the drafts! The Wynd air quality tracker has been sold out for a long time, but it's part of another product, a personal air purifier / tracker bundle [3], too. 1: https://hellowynd.com/products/wynd-air-quality-tracker?variant=44077938082065 https://hellowynd.com/products/wynd-air-quality-tracker?vari... 2: https://purpleair.com/ https://purpleair.com/ 3: https://hellowynd.com/products/wynd?variant=25232063299 https://hellowynd.com/products/wynd?variant=25232063299