The first experiment (1) : I let the monitor for 6 hours without any external activities
The second experiment (2): I let the mono for 6 hours and between those hours I lit a candle for a while and open the windows for a while .
My hypothesis is that external activities such as burning candles and opening windows might affect indoor air quality
Furthermore there were greater variability when I opened the windows burned the candle
Please let me know if you need any more information .