Sleeping in a Closed Room – Indoor CO2 Analyze

The nights became colder so we started closing the window during night. This brought the topic of measuring Indoor CO2 again in scope. Motivated by this research, i decided to try and close also the room door it and monitor what happens with CO2 Levels during the night. As you know elevated levels of Carbon Dioxide can result in headaches and bad sleep. You can find an interesting read about this here.

Or bedroom is ~16 m2, part of a 120 mapartment and usually we do not close our door. The apartment is free and we do not have lot’s of flowers inside, so the CO2 Level in the evenings is ~800 PPM. On the chart below you can see the changes in CO2 based on the occupancy of the room and whether the doors or windows are shut or open.


While I was expecting it would rise, i was quite surprised to see the rate in which CO2 rises. On the chart below i have estimated it at ~430ppm/h.

Indoor CO2 in a closed room

Time-Graph of CO2 PPM Level while sleeping in a closed room

What you can clearly see on the chart is how each change in the rooms occupation affects the CO2 Level quite quickly. Also what is astonishing is that we passed 2000 ppm at ~1 am. This is just 2 hours after we went to sleep in a relatively fresh air.

At 4.30am i woke up (i usually wake up then) and the air felt quite stuffy (maybe also because i Knew the PPM). But then i decided to open the door wide and give my wife and baby some fresh air.

If i had left the door shut, the level would have easily reached 4500 ppm until 7am.

The next test that i am about to do is to try keeping the door just 10-20cm open. This is how it how it usually stays. Some quick observations from last nights showed that also in the case CO2 was rising, though not that fast.

7 thoughts on “Sleeping in a Closed Room – Indoor CO2 Analyze

  1. Pingback: vThings WiFi CO2 Monitor Quick Start Guide

  2. Hi, thanks for this research. Usually I sleep in small room with closed door seems I am continuously getting too much of CO2 at nights. Could you please share which meter do you use for checking CO2 levels and from where can I get it??


  3. Pingback: CNXSoft — Новости Андроид приставок и встраиваемых систем » Быстрый старт с vThings WiFi CO2 монитором

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