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Saw that they wanted to put these in class rooms to see if they are ventilated enough. That seems like a good idea and want one for my shop.
A quick look on amazon throws up conflicting reviews on most of the devices.
So I thought I'd ask on here .
I've got an Awair Element, which is pretty good. Monitors C02, temp, humidity, VOCs, Pm2.5 as well. Has a display on the unit as well as connecting to app. You can export the data logging to excel if you want to get nerdy with it. Price has nearly doubled on them since I got mine though, COVID demand perhaps
Worried about your homes co2 emissions.
Perspective..
Not really, I'd like to know when we need to ventilate the shop to stop us getting covid...again.
I’d like to know when we need to ventilate the shop to stop us getting covid…again.
Exactly. CO2 is a proxy for exhaled air / virus particles.
They did that in my work. It's utter bollocks, whoever came up with that needs slapped as well as the sycophantic idiots that never had the balls to tell them it's a stupid idea.
We use them in work, both passive personal devices for entry into pipe tunnels and GMI pumped instruments that detect as little as 0.05% above normal atmospheric limits (kinda handy for detecting reactor gas leaks). It's not uncommon to forget to turn them off and the amount of times I've been in the 2 desk howf with about 4 or 5 folk crammed in (pre-covid) with not a cheep out of a detector is unreal. This room, FWIW has no extraction or windows and is in the middle of the building.
So to reiterate, it's nonsense, utter nonsense. Oh, and the personal devices usually used are especially crap, they are good for detecting dangerous amounts (as is their design) but are in no way designed to be used in this way.
pointless load of crap for covid.
So to reiterate, it’s nonsense, utter nonsense
That's a shame, I love a gadget.
It could probably be useful if you had a sensitive enough instrument but you would have to factor in the occupancy of the room, it's volume and what is being done in there (is it a sports hall or a library?). Then you would need to site the detector somewhere away from any windows, doors or draughts (same as your home CO detector) and at a height appropriate to where people are breathing. Then you need to decide if it's going to be passive or pumped and whether you are prepared to put up with the noise and constant beeping (oh yeah, they beep all the time to let you know they work). Finally someone has to make sure it's properly calibrated and tested regularly using a CO2 mix specific to the alarm level (otherwise how do you know it actually works?).
Or you could just open a window/door every so often.
aranet4 seems to be the cheapest reliable monitor from a decent company:
https://aranet4.com/
They provide two apps, one that just echoes the display on one’s phone, and the other that provides a chart of readings over the previous 7 days.