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Re: CO2 monitors

Posted: Thu, 25th Nov 2021, 3:21pm
by AndyCornwall
Nail wrote: Thu, 25th Nov 2021, 9:32am The guidance says:

"You should take action to improve ventilation where CO2 readings are consistently higher than 1500ppm. There is no
need to stop using the room."

Why arbitrarily decide the level should be 1000 instead? Why not 1010? Why not 900?
For me I would want to not reach poor air quality, but aim for something better so it never becomes an issue.

1500 is as arbitrary as 1000, but 1000 is better, being the highest outside CO2 levels expected.

When all is said and done, measuring co2 levels with cheap devices in small rooms and dubious placement has questionable merit. It's something that can be done however to at least get the gist of your air quality.

Re: CO2 Monitors

Posted: Wed, 1st Dec 2021, 5:32pm
by untyull
Good Afternoon everybody. Just joined, very interesting what you have put about the monitors. All my teachers have said please put them where the kids cant see them. (well something like that) so what is the point.

Re: CO2 Monitors

Posted: Mon, 6th Dec 2021, 12:09pm
by Dc1985
i have a load come in but again same as everyone the batteries dont seem to last more than a day and they dont come with a power supply only a usb and teachers have a number of things plugged into theres and the regs state they must be at head height not near a window and half a metere away from a person

Re: CO2 Monitors

Posted: Mon, 6th Dec 2021, 2:36pm
by Vera
Dc1985 wrote: Mon, 6th Dec 2021, 12:09pm i have a load come in but again same as everyone the batteries dont seem to last more than a day and they dont come with a power supply only a usb and teachers have a number of things plugged into theres and the regs state they must be at head height not near a window and half a metere away from a person
The batteries are only for holding settings and for the occasional unplug and move, they are not really supposed to run on batteries.
Use the USB lead and a power adaptor.
As for the recommendations use a bit of adaptation as lond as they are not near a window or on the ceiling or floor then they will still give a representative reading.

For the children not to see them, as long as the teacher can see them that is all that is needed, just use as a guide for general room ventilation.

Re: CO2 Monitors

Posted: Thu, 9th Dec 2021, 2:48pm
by jholden
We have, this afternoon, had all 41 of the battery/USB powered CO2 monitors that were delivered a few weeks ago taken away, and we've being left with a new batch of 41 fully mains powered units! All this must be costing thousands!!

Re: CO2 Monitors

Posted: Thu, 9th Dec 2021, 2:50pm
by TBombadil
jholden wrote: Thu, 9th Dec 2021, 2:48pm We have, this afternoon, had all 41 of the battery/USB powered CO2 monitors that were delivered a few weeks ago taken away, and we've being left with a new batch of 41 fully mains powered units! All this must be costing thousands!!
Less work for you with replacing the batteries [---- (The word only permitted in December) ----_laugh.gif]

Re: CO2 Monitors

Posted: Tue, 14th Dec 2021, 11:51am
by Bill1903
I'm having problems with staff panicking about the monitors showing a high CO2 level

Scared to open a window in case they get a chill [---- (The word only permitted in December) ----_angry.gif]

Re: CO2 Monitors

Posted: Tue, 14th Dec 2021, 3:56pm
by AndyCornwall
I cant get ours to shut the windows...the heating is running all the time in a super efficient building. Well it would be if the windows were shut.

Re: CO2 Monitors

Posted: Tue, 14th Dec 2021, 4:17pm
by Sharky
we had 13 delivered. unless you we have them plugged in they only monitor for a short time and switch off. staff cant be bothered with them and im sure im not going round all day turning them on to check em! so done my bit and put them where i was told to. now they sit there and do nothing..... useless.

Re: CO2 Monitors

Posted: Tue, 14th Dec 2021, 4:54pm
by Bilton
Lucky enough to get all our USB only ones replaced with mains. Had two in my office for the past week and both have pretty much the same reading, which is quite encouraging. Will be putting them in classrooms when we break up and see the reaction next term. If you had originals from Rexel they are in the process of changing them as they had lots of complaints