Was asked in a pte msg regarding my post earlier about PM0.1 (Ultrafine particles) and the Samsung filters. And also whether the TB HEPAs can handle or not.
Actually you guys with a laser particle counter can use cigarette smoke as a source. Maybe your counter is able to measure accurately down to 0.5 microns only, or some cheap ones claim to be accurate down to 0.3 microns. Not an issue, you don't really need to measure it to anywhere accurate. We can just talk about "relative".
PM 0.1 or PM0.05 can be detected by by the IR laser, just not in an accurate sense.
ie If your initial 0.3 microns count is like 500,000 particles per L of air, and after 1hr it drops down to below 300, that speaks volumes already, that's 99.9+% drop in ambient (not talking about directly @ the air purifier output)
http://www.em-consulte.com/rmr/article/203034
Particulate distribution in the size categories (table I and figure 2).
The number of particles in the size category above 2 µm was close to zero for both air streams.
69.6 % ± 13.8 of the S1 particles and 95.8 % ± 4.4 of those in S2 are below 0.3 µm. 30.4% ± 14.8 of the S1 particles and 4.2% ± 4.1 of those in S2 fell into the intermediate category between 0.3 and 2 µm.
I can tell you that with decent enough HEPA surface area (size x depth) and/or number of air purifiers, cigarette smoke can be filtered, even with the cheap TB HEPAs.
Don't believe me and my cheap equipment, that's understandable.
But believe this video with a 5-figures $$$ counter.
Below post was posted in page 271 by me.
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Another good 11 mins video with regards to Air Purifiers testing in China in their standard 30 cu metre test chamber.
Note, they are using a crazy high
1000 ug/m3 (1mg/m3) initial concentration with cigarette smoke. Compare with the end result, which is very low.
Samsung AX40 and IQAir Healthpro tested inside!
Samsung AX40
Result : Slightly above 1000ug/m3 (!!!!) got filtered to 1 ug/m3 within 35 mins
Power consumption : 27.5 watts as measured (official spec is 34W)
IQAir Healthpro (not sure which model but I don't think got any below SGD2,200)
Result : Slightly above 1000ug/m3 (!!!!) got filtered to 1 ug/m3 within 28 mins
Power consumption : 139.1 watts as measured
Difference in electrical cost is
SGD117 per year based on. 12hrs daily usage
The last air purifier, the Yadu, is a Chinese unit with a lower airflow spec.
Usually they do not use good stuff like energy efficient DC motors etc.
Video in the details section of the below tmall link.
http://detail.tmall.com/item.htm?sp...=43954500555&ns=1&_u=51u0hciba683&abbucket=10
