When HN users recommended it
1 HN user recommended this in 2020, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
1 HN user recommended this in 2020, in one comment.
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
There are lots of ~$150 meters on Amazon. (e.g. https://www.amazon.com/GZAIR-Temperature-Relative-Humidity-0...) I've used some of these meters and the quality you can get for $150 is surprising! I've basically just held meters near filters, windows, and fans to understand air quality.