[techiferous]

After watching this Tom Scott video https://www.youtube.com/watch?v=1Nh_vxpycEA I bought this CO2 monitor: https://amazon.com/gp/product/B00MB93CK8 It worked quite well and showed that I don't have anything to worry about. Now I'm trying to pass it on to someone else. I'll be willing to sell it for half price if anyone is interested.

[darkmighty]

If anyone is interested it seems you can find (more or less reliable) sensor modules for about $20, such as the MH-Z19, and read it from to an arduino or esp.

[essem]

sent you an email!