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Airgradient: First air quality monitor to be officially compatible with Home Assistant
(www.notebookcheck.net)
this post was submitted on 07 Sep 2025
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$230... the sensor monitors:
vs IKEA sensor (VINDSTYRKA for $60).
Fine enough product I suppose... but not sure that those 2 other sensors would ever be worth $170 more for me, especially since I have a CO2 monitor on one of my fire alarms on each floor... and those alarms have a z-wave relay on them. Especially since it's wifi and I prefer zwave/zigbee to keep the wifi less cluttered. The real site (https://www.airgradient.com/indoor/) mentions pm1 and pm10 but only in like one place and doesn't go into detail on that sensor in use or anything like that. So not sure about that. 2A power adapter requirement (non-included) seems excessive as well... They do claim that they will never lock in, that nice. They support their own software though... so there's always that risk I suppose of any ol' firmware update locking it down, though the certification hopefully proves that this won't happen. I bet it's more accurate than the VINDSTYRKA, but I'm not sure how much accuracy people actually need vs just monitoring the trend and triggering on spikes.
I'm more interested in finding an outdoor unit since air quality isn't often part of any weather station setup. This company has outdoor units, but they're all cellular and way expensive. Anyone know of a good outdoor unit?
Your fire alarms most likely have a CO detector, not a CO2 detector. I don't really know the point of a CO2 detector, though, so I agree with you on everything. Just get a few more indoor plants if CO2 is a concern.
Unfortunately, you can't just put plants everywhere. CO2 conversion is also highly dependent on light levels, which sufficient light levels not being achievable everywhere.
Office buildings with a large number of people meeting rooms etc.) could also benefit from monitoring.
Heck, even at home, I have a room that quickly accumulates CO2, easily reaching 2000ppm with just a single person being inside, which makes spending prolonged time in said room a tiring affair.
https://pmc.ncbi.nlm.nih.gov/articles/PMC11253968/
https://www.pjoes.com/pdf-68875-24089?filename=The+Influence+of+House.pdf
https://www.sciencedirect.com/science/article/pii/S2666790823000502
You need a lot of houseplants to make up for a human. Humans exhale something like 1 kg CO2/day where plants consume something like 0.2 kg/hr/100 m2. Figure natural light, maybe 6-8 hours of full sun in a day, and you'd need 60-80 m2 of leaf surface.
That kg/day of CO2 is enough to raise a 200 m2 home to 3000 ppm CO2. CO2 diffuses pretty well, but my 110 m2 house equilibrates around 1000ppm when it's sealed against the summer heat.