Ask HN: What indoor CO2 monitor do you recommend?

I picked up a pair (indoor+outdoor) of https://www.airgradient.com monitors a few months ago. Happy with them so far though I have not decided on their final positions.

Re: Ask HN: What indoor CO2 monitor do you recommend?

#7

Post by huseyinkeles » Fri, Jun 21, 2024, 2:09 PM UTC

If you want to go DIY route; I use MH-Z19 sensor along with an ESP-32 which has ESP-Home installed on it, works very well and I log the data on Home Assistant.

Re: Ask HN: What indoor CO2 monitor do you recommend?

#8

Post by sschueller » Fri, Jun 21, 2024, 2:10 PM UTC

I really like the airthings view plus which also measures radon.

https://www.airthings.com/en/view-plus

Re: Ask HN: What indoor CO2 monitor do you recommend?

#9

Post by tomek_ycomb » Fri, Jun 21, 2024, 2:11 PM UTC

phinnaeus wrote: post #6

I picked up a pair (indoor+outdoor) of https://www.airgradient.com monitors a few months ago. Happy with them so far though I have not decided on their final positions.

Excellent information from the person(s?) running air gradient with regards to pm sensor tech and design. Blog posts, etc.

Ranges of kits from pre assembled to solder-yourself, that HN might like.

(I am happy with my unit I gave to a friend with a wood fire stove heated house, and built one from kit to save some $ another time.)

Re: Ask HN: What indoor CO2 monitor do you recommend?

#10

Post by huevosabio » Fri, Jun 21, 2024, 2:12 PM UTC

mrsirduke wrote: post #4

I've been happy with the awair element[1] for years. It also measures PM2 and temp/humidity/voc. [1]: https://www.getawair.com/products/element

I was happy with my awair until it died after a mere year and a half from purchase. Now its just an expensive brick.