Domoticz

I'm wondering how my Thermo / Hydro sensors calculate the values normal, comfortable, dry and wet. I get the feeling this has something to do with the dewpoint, but I can't find the exact calculation.. I did find: http://www.osengr.org/WxShield/Download ... ols-II.pdf

Does anybody know how these values are calculated? (I'm not asking for the formula for dewpoint as I am aware of how it's calculated).

Humidity status is supplied by some sensor types and normally the same as the table below.

If the sensor does not deliver a status it is set using humidity value:
0% to 39% = dry
40% to 70% = comfort
above 70% = wet