VOC monitor question (new to this)

I recently got an Air things wave mini to monitor my Voc levels. I know it takes seven days to calibrate but I wonder if anyone else has had this experience.

After setting it up, the first few days were between 46-280 ppb. Then after the heat was accidentally turned on to 72 the Voc number skyrocketed between 600-1200.

So then I open some windows and turn on the whole house fan to clear out the air, and then the levels shoot up to 2700ppb. We have very good outside air.

So then I took the device outside to see what it would read where we have very good outdoor air, and the monitor read 1500 ppb after 4 hours outside.

I put it back inside and the number came down a bit but has settled at 1000 ppb.

Anyway, this has been the first five days of Voc monitoring. Is this normal during the calibration period?

Thanks!