I did a rough log of today's CO2 data just to see what it looked like.
Y axis is CO2 in Parts Per Million (ppm)
X axis is time 24 hours per day (are you paying attention Piwoslaw?)
So, there's a steady increase from the time I wake up until about 10:00 when I went to do some errands. I returned at about 13:30 and logged CO2.
Around 17:00, another reading, then I took some soup to the neighbor, and stayed for a short visit and took a reading when I returned.
Shortly after that at around 19:30, a friend dropped by and we chatted for a few hours, at the end of which I took the final reading.
After he left, I opened two windows, to flush out the CO2... never did that before!
It's amazing... the record of the day in CO2.
Best,
-AC