Michael Stapelberg 🐧🐹😺Dec 26
Got my first co2 sensor. If it show constantly good valued that means the insulation of the place is terrible, right? :P
Show threadMichael Stapelberg 🐧🐹😺

Answering all replies at once: Yes, the sensor was calibrated outdoors (to 400 ppm, as expected), yes, this was with windows closed, yes there were 4 people breathing in this room for hours.

I‘m still convinced poor insulation is the reason. (Also consistent with other symptoms in this house.)

Dec 26 at 2:04pmWeb
Show threadIn #Flancia we'll meetDec 26
@zekjur if at all in doubt I can lend you my Aranet / we can swap for a bit :)
Show threadMichael Stapelberg 🐧🐹😺Dec 26
@flancian Thanks! I’ll observe how it behaves when I am back home. Might get back to you on that afterwards
Show threadLukas GrossarDec 26
@zekjur We need to ventilate regularly to keep ours below 2000 ppm in a house built in 2008.
Show threadRobert EdmondsDec 26
@zekjur 635 ppm is a great result under those conditions that means either active ventilation is in use (e.g. ERV/HRV) or high amounts of leakage across the building envelope. There is something called a blower door test that can be used to quantify the airtightness of a building.