The question is whether the high DM count from ultrasonic humidifier is real health threat or it is misreading from the sensor detecting water droplets.
i have some data to present below to show you the effect of humidifier on DM reading of Dyson air purifier.
i have two Dyson air filters in two bedrooms. I have used four different humidifiers. I have two RO filter water units.
first humidifier is hot steam mist humidifier from CVS, distilled water (DW) is fine. When I switched to RO filtered water, DM count elevated to red. Too old to haul in 20 gallon DW water every week, I sought different humidifiers.
second, Honeywell germfree cool mist humidifer. This works very well with RO water, never have high PM count. The frit lasts longer than the ones I used 10 years ago. This works for a small room in desert environment, but does not have enough capacity for the bigger master bedroom.
third & fourth— Honovos H786 and HQ-2H-JS919. I used both these high volume ultrasonic humidifiers to raise humidity in my master bedroom. Works fine for a month without high DM, until a few days ago. DM went to red, turning off them, DM went green. Turn on either one, DM red again.
There is some discussion that the PM sensor maybe contaminated (sorry, I don’t know how to link search here). I put two Dyson purifiers side by side, one from small bedroom that not exposed to ultrasonic humidifier before— and both went red in PM count. So it seems the sensor is not being contaminated.
Google AI search suggested that the sensor maybe detecting large steam particle — mostly not harmful but residue from RO may still be a problem. It suggests to use DW— but that is what I tried to avoid in the first place.
one possibility is Honovor humidifier degrades in one month period. I will leave that possibility on the table.
Back to my title question, any one has information whether Dyson sensor is detecting water vapor from ultrasonic humidifier? Or the PM reading from Dyson purifier is truly alarming?
