I have more allergies than I can remember so there’s no doubt about that. I have a BlueAir Classic 400 running 24/7 plus one extra air purifier that about every store in Norway now has a rebrand of by now in my bedroom running while I’m asleep.
I’ve not had this issue in the past 10 years I have lived here but I have been more physically active in the past couple of months which may be why I’m noticing it now. This has not been a problem when I have been able to keep windows open, but now that winter is coming and all my windows are closed is when I started to feel like this. It also goes away if I do open a window but then I’ll just sit here freezing or working against the cold with an electric oven or heat pump.
I bought the TVOC sensors because I thought these would give me any info or some warning if I did need to air our the office and apartment but they say the air is as pure as can be. One of them reads as low as 14 ppb.
I did not know that there was a difference between TVOC and CO2 when I bought and installed these, so I thought they were junk, hence my initial post.
And you are correct that I don’t need a sensor to tell me to open a window, but again I thought these would tell me something useful why it feels like I’m not getting enough air at least. So far they do not lol.