3 ms·

https://amzn.to/2ZlI0EU https://amzn.to/2ZlI0EU This one is good. The company that makes it co2meter.com is awesome and was helpful as I was learning more. I

by doitLP 6y ago

https://amzn.to/2ZlI0EU https://amzn.to/2ZlI0EU This one is good. The company that makes it co2meter.com is awesome and was helpful as I was learning more. I went down a bit of a rabbit hole in general air quality after that. I ended up with the uHoo monitor. It’s a pricey but great.