I have some doubts on how these dehumidifiers works. I bought a DB 36 a week ago together with a colleague. Hence, we were like comparing among ourselves on the position that we shld be tuning the dial so that it will hit the 40% - 50% range. However, I realize that that we do not meet: for example, i could be hitting 40% when the dial is pointing at 10 o'clock but he hits 40% at 12 o'clock position.
This makes me wonder if:
1) The dehumidifier control works so what like a thermostat - each dial position will dictate a specific manufacturer's setting (eg xxx%...). Hence, the controls keeps 'drying' the air in the cabinet until the desired RH is reached and stopped. It is like saying i want to heat a kettle of water until 50 degrees. Once it hit 50 degrees, it stops; or
2) The dehumidifier control works independent of the actual RH - each dial position will dictate how hard shld it be drying the cabinet. It is like saying, in the context of heating a kettle of water, I will always add a 1m branch to support the burning fire. Depend on how much water there are in the kettle, it might not always boil.
(2) is different from (1) as the former is dependent on the local environment that you are in. Assuming (1) is valid and a test is done on a same unit in two vastly different location (Singapore and desert). Without changing the position, the same RH value will be achieved.
However, if (2) is true, the unit will have to work harder in Singapore to change the RH to the 40% range in general than the unit in a desert, while maintaining the dial position unchanged. While keeping the unit at the same place and dial unchanged but yet the RH changes, it would means that the RH of the environment has changed.
In view of my experience with my colleague and the example stated in this threadstarter, I tend to believe (2) is true and that the situation faced by Knoxknocks in the rising RH is normal?
Appreciate your views, pls. Sorry if this does not make sense. :sweat:
