hi… I have a question about the formaldeyde values.

I noticed, when window is closed, the value is after a while of running around 0017 mg…

When i open the window, i would expect that the value gets rapidly lower… but it doesnt, instead it grows up to 0030 and then falls slowly between 0020 and 0023 mg…

I have smoking neighbours, but we have big gardens and the neighbour only has somewhere an ashtray in the garden. I dont know if this can be an explanation? But how could the value be so high?

Do you observe the same behaviour? Which values do you have when opening windows?… thanks