3 ms·

I have one and it tracks very poorly. It tracks only the usage time regardless of how fast the fan is running. When on auto, it is mostly spinning at idle, har

I have one and it tracks very poorly. It tracks only the usage time regardless of how fast the fan is running. When on auto, it is mostly spinning at idle, hardly sucking air through the filter, and as such it's hardly contaminating the air filter (in fact the airflow is so low I stopped using auto mode at all, there is just no point). It also doesn't take into account how contaiminated the ambient air is (even though it has an air quality sensor on the one I have). I run mine at about 40% so I use the filters about 2-3 lifetimes :) Even that is a pessimistic approach IMO because the air here is very clean. I mainly have it because of hayfever (pollen allergy).

chmars 4y ago
In automatic mode, different ppm level should result in higher fan speeds. That is at least the case with my filters. Cooking for example can be a trigger. You are of course right that automatic mode does not do much. At the same time, higher fan speeds are noticeable (and annoying).
- GekkePrutser 4y ago
  For my environment it never ramps up in that mode at all. Ambient levels are never higher than 10ppm or so. I know the sensor works because once there was a small bin fire outside. There was no visible smoke indoors, I only noticed a slight smell. But the purifier immediately ramped up and showed over 200ppm.. So it does work. I'm surprised it's so low as I live at the 2nd floor on a fairly busy street with many diesel buses passing.