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On whether changes in bedroom CO2 levels affect sleep quality

gwern.net

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Re: On whether changes in bedroom CO2 levels affect sleep quality

#31

Post by tossandturn »

bizzleDawg wrote: post #16

I've worked on environmental sensing iot projects and have seen the cost of co2 sensors. Almost all the cheap ones are VOC sensors which infer a co2 level by assuming the VOC output is from humans (rather than paint for example). Given the cost of the device I would be amazed if it wasn't a VOC based sensor. The cheapest CO2 sensors I've seen are well over $250, even in bulk. CO2 is quite innert, so it requires very…

I have developed custom Ethylene sensors in the past for customers, and Dynament (UK) is a manufacturer that I can definitely recommend if anyone wants to do this and go down the DIY electronics route without having to dig through a bunch of Chinese products to find the "right one". https://www.dynament.com/products/gas-sensors/standard-non-e...

Re: On whether changes in bedroom CO2 levels affect sleep quality

#32

Post by hyperpape »

gwern wrote: post #9
cypherpunks01 wrote: post #5

Earlier quoted context omitted.

I believe this is just a transcript of the ongoing experiment, see "status: in progress". Looks like gwern didn't write up the data yet, they have a lot of other experiments going on at the same time most likely..

Yeah, it's not done. I don't know why you guys are reading it.

I don’t know why someone submitted it, but we’re reading it because your “in progress” is ambiguous between “writeup/literature summary in progress” and “experiment in progress”. The first is potentially worth reading, the second is likely not.

Re: On whether changes in bedroom CO2 levels affect sleep quality

#33

Post by [deleted] »

DocG wrote: post #29

I was lucky to get my hands on 5 proper co2 sensors from university, while I was teaching and working. So plenty of test places. What I found: -Just a couple of hours in a office, without ventilation spikes the co2 enough to make everyone dizzy and tired by the end of the day. Keeping eye on the meter and ventilating properly, increased everyones productivity and people werent so tired by the end of the day. - Classr…

[deleted]

Re: On whether changes in bedroom CO2 levels affect sleep quality

#34

Post by kickout »

DocG wrote: post #29

I was lucky to get my hands on 5 proper co2 sensors from university, while I was teaching and working. So plenty of test places. What I found: -Just a couple of hours in a office, without ventilation spikes the co2 enough to make everyone dizzy and tired by the end of the day. Keeping eye on the meter and ventilating properly, increased everyones productivity and people werent so tired by the end of the day. - Classr…

Curious if you have a link to what sensors you had? Think this is cool and i've been on/off looking for co2/o2 sensors greater than recreational precision

Re: On whether changes in bedroom CO2 levels affect sleep quality

#35

Post by Klathmon »

zrail wrote: post #30
jere wrote: post #12

I'm eager to hear the results. I recently got an Awair 2.0 after seeing this talk by DHH: https://www.youtube.com/watch?v=MRqh8oLY7Ik It quickly confirmed that, without turning my thermostat fan to "ON", my bedroom CO2 jumps from about 1000 ppm to 2000 ppm within a couple hours of us going to sleep. In the fall, my wife and I started waking up in the middle of the night feeling like we couldn't breathe. What I figure…

Our HVAC system has a “circulate” option that we sometimes keep on. It turns the variable speed blower on the lowest setting a few times per hour and keeps air flowing well.

Yeah, we have a Nest in our house and I have it set to circulate the air for 15 minutes out of every hour.

We started running it like that only at night as we found that the bedroom would get pretty warm during the summer while the center of the house (where the thermostat was) would stay nice and cool, but after running it like that for a bit, decided to just let that routine run all 24 hours of the day since it equalizes temperatures so well across the whole house.

Re: On whether changes in bedroom CO2 levels affect sleep quality

#37

Post by leonroy »

kickout wrote: post #34
DocG wrote: post #29

I was lucky to get my hands on 5 proper co2 sensors from university, while I was teaching and working. So plenty of test places. What I found: -Just a couple of hours in a office, without ventilation spikes the co2 enough to make everyone dizzy and tired by the end of the day. Keeping eye on the meter and ventilating properly, increased everyones productivity and people werent so tired by the end of the day. - Classr…

Curious if you have a link to what sensors you had? Think this is cool and i've been on/off looking for co2/o2 sensors greater than recreational precision

Can’t speak for OP but I’ve been using the IQAir Air Visual Pro and can support everything they’ve said. I try to keep CO2 around 400-500 in my office and home but it spikes surprisingly fast with even one person breathing in a medium sized room.

It can integrate with HomeBridge and has a good API and unlike a lot of IOT stuff it’s well supported and stable.

Re: On whether changes in bedroom CO2 levels affect sleep quality

#38

Post by larrik »

Someone wrote: post #28

”But if one room can mix with and increase the Netatmo’s room all the way up to 1934PPM, what must the original concentration have been like?” Why not move the weather station to the bedroom for a couple of nights? (And make sure the sensor is at nose/mouth height, preferably close to it. CO2 is heavier than air, so concentrations may be higher closer to the floor in a closed room with little movement) I would also d…

"Why not move the weather station to the bedroom for a couple of nights?"

which he did, not too far further into the article?

Re: On whether changes in bedroom CO2 levels affect sleep quality

#40

Post by graeme »

DocG wrote: post #29

I was lucky to get my hands on 5 proper co2 sensors from university, while I was teaching and working. So plenty of test places. What I found: -Just a couple of hours in a office, without ventilation spikes the co2 enough to make everyone dizzy and tired by the end of the day. Keeping eye on the meter and ventilating properly, increased everyones productivity and people werent so tired by the end of the day. - Classr…

What level was it at when you started noticing those effects? And how did you measure productivity?

I have a sensor and try to keep readings low. My girlfriend isn't quite convinced though, especially in winter....

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