Mine is 4 room reslae. The living room i close the kitchen door running 2 Ax40 takes 20min to clean.
Edit i see u using low speed. Try turbo for 20min see how. Turbo mode is noisy and i beleive max time is 20min
Didn't catch the whole convo between you and tanj82 but just the last few threads.....seems like the inability of the XM to clean it down to 0.
Mentioned before in the thread (actually just mentioned within 1hr ago in the 2015 El Nino thread). It all boils down to the ACH / Air Change per Hour.
Different usage needs different ACH as well, haze is good with 2 ACH but 2013/2015 levels you might wanna aim for 5 ACH. Dealing with sinus/allergic rhinitis, you would need comfortably more than 5. 8-10 ACH is not unheard of, plus the usage of the aircon or stand to increase circulation, so that the allergens are blown away from your face during your standard flipping + turning during sleep.
Gunning in Turbo/High mode for 30 mins first helps.....but operating in low mode for prolonged periods means the levels would rise again. Ultimately it also depends on your expectations and also the external haze levels. On hazy days, i am confident to say that it won't be sufficient, perhaps not even medium speed. In 2015 really hazy days, even Turbo mode might not be sufficient without the recommended "sizing" of 5 ACH....in fact leaky houses and sensitive individuals need comfortably more than that. You can see this very clearly with a seperate meter, esp the meters with laser particle counter modules. This phenomenon has been reported from multiple users, not only me, but then 2015 was an oddball haze season.
Xiaomi APs won't do much in low mode. So won't Samsung, Sharp, IQ Air, Blueair in low mode. Good for light sleepers to sleep in though, but that's about it.
Another thing is the Sharp IR module used in stuff like Xiaomi APs and Mfresh APs. I am not sure about how it operates in the Xiaomi and how good is the associated measurement circuitry. But trust me, in the Mfresh it is not very usable...the resolution is not very good in accuracy and the values jumps around. I have 3 laser particle counters and 1 Sharp IR module in another meter, lets just say that the Sharp IR module meter is not really good, just can tell you got haze or no haze. But in a jiffy it does tell you if the haze is dense or moderate though, from what i see the M8088A's readings in 2015 haze.
Edit - But i have seen one implementation of the Sharp IR module in a meter that's used by another user Ximple if i remember correctly. His readings were quite solid and usable during 2015 haze season and provided us with decent readings that were usable and even trackable vs NEA 1-hr concentration values, nearly as good as the laser particle counter meters. Basically it depends on the measurement circuitry that measures the very fine voltage output from the Sharp module. My meter with the Sharp module was just too "coarse".
Moral of the story - many many variables out there.
