(1) I saw the video on the M8088A posted by dqwong, and saw the 584 m3/hr spec.
I wanted to consolidate my APs, which I have been doing so (sold 4 liao) coz the 2015 haze season is closing. I learnt some stuff in 2015 with high concentration haze.
I know I need the horsepower (m3/hr) but I also appreciate low electrical consumption at a decent airflow. 5 ACH is a must for allergic rhinitis suffers,
minimum. 8-10 ACH is recommended esp for those severe cases.
I have already tamed mine such that ~ 5 ACH won't trigger my threshold already. It's basically an inflammation based allergic reaction that you'd have to consistently control it so that the inflammation can heal. You do this with allergen control (preventive) or with antihistamines (reactive). And some cases you need months before you see results. Taking so much meds usually does not go down with a lot of people and probably is not good for some organs, of coz you know people are lazy in taking meds, so your inflammation does not get the chance to fully heal. Endless loop, up down up down response to the allergens. This can go on for > half of your lifetime!

It's needless suffering.
http://www.myhealthbeijing.com/2015/03/
•Since a proper air purifier needs to replace the entire room air at least five times an hour (5 Air Changes Per Hour, or ACH) to really be effective, you need air purifiers that collectively can cover the volume 5 times. So the total airflow (风机空载风量), or Clean Air Delivery Rate (CADR) you need = room volume x 5. For my front rooms, I need 210 x 5 = 1050 cubic meters per hour (m3/h) CADR. Since no single machine has this much power, I’ll need to buy a few machines.
•Then you need to research air purifiers’ CADR —
but here’s where it gets tricky: the published CADR applies only to max speed which is almost always not the speed you will be using 99% of the time. Most machines’ max speeds are far too noisy for normal use, and the speed you’ll actually be using may have airflow much less than the published CADR. The problem is that it’s hard to find published CADR for the lower speeds. I think as a general rule, you should cut the CADR in half to get a more accurate sense of how much coverage you’ll get.
M8088A in medium mode is 326 m3/hr, draws 29W only. Great. After receiving it, I found that it's even more silent than the AX40 in high (323 m3/hr), not a lot but it's appreciable. Nice.
M8088A in high and turbo mode causes fatique when people are around. There are specific uses for this, but it's limited.
This "fatique" is not new to many of us who are experienced with APs, many users of the HW 50250 back in 2013 (PSI 401) already know of this in speed 3 (250 CFM, approx. 430 m3/hr), and had to resort to kick back to speed 1, which is too low......and STILL is a bit too loud for sleeping for the light sleepers. High CADR is usually 80% gimmick, the use in real life is very specific and limited....and is useful only with "automation". With the 50250, it's all manual, you'd have to control it.
With Sharp APs, the Clean ION mode is useful in that it guns in higher (noisier) speed for 20 minutes and kicks back automatically.
With xiaomi and M8088A, this is auto, and further enhanced with remote control app on your mobile, so that you can either control before reaching home, or set a daily auto power on routine.
Do consider this. A typical 4-room BTO MBR is about 52 cu metre in vol.
In medium, it's 326/52 = 6 ACH. Even if you generously give a 20% allowance due to furnitures/bed/cabinet, it's still 7.83 ACH.
Is bare minimum.
Some use a single Sharp A28 and comment that it did not help their sinus or rhinitis at all. Just read the qoo10 reviews/comments.


That's probably because they operate it in medium or low speed, due to high speed being too noisy. Then they and some doctors say that it's gimmicky and cannot guarantee a cure for the condition. I have been a rhinitis sufferer for the past 30+ years and am a AP user for 9 years, no issue for me.
Basically that's about it.