Air purifier?

[WussRedXLi]

I think i'll go for samsung from daiso. But ax40 like very bulky. What's the main difference compared to ax20?

Basically the AX022 is half the performance of AX40.

 

[sjchai75]

saw this at Taobao...

http://world.taobao.com/item/41340681941.htm?spm=a312a.7700714.0.0.hlDHn7#detail

will cost u around S$43...not including shipping fees

Judging by the current exchange rate, that AX40 filter cost roughly $62.20 without postage. Another seller selling at 5 RMB cheaper, still end up like $60~61 SGD without postage. Judging by qoo10.sg, Daiso seller, selling at cheapest $79 SGD, i guess Toabao still bit cheaper.

But for me, maybe i will try out brother WRX method in future when my AX40 need filter change. Can't wait for it to arrive though.

 

[sjchai75]

购买请注意：如果货物库存量少，本店有权对不在本店购买主机的客户不发货。



It costs around $70+ total. Not 43. Got TB 3% and CC 2%, and TB 3% and 2% is double coz once you will pay seller and once is to forward to SG. Plus forwarding price.

Maybe can get some friend from China help to purchase and bring over.

 

[wongminmin]

I think i'll go for samsung from daiso. But ax40 like very bulky. What's the main difference compared to ax20?

============
for those who are buying filter from taobao...becareful...most of taobao products are fake. Remember to read the reviews....

 

[kohkindachi]

Thanks. Bought the AX40 liao

============
for those who are buying filter from taobao...becareful...most of taobao products are fake. Remember to read the reviews....

 

[pillow89]

hi all, am planning to get the AX40 from qoo10. Since we on the topic on air purifier, im just wondering if AX40 is also effective in filtering dust ? dont wan a white elephant during non - haze period lol

 

[WussRedXLi]

Someone PMed me asking if we need to filter ultrafine particles or not, as our normal HEPA air purifiers are unable to handle UFPs (which is untrue to a large degree) coz there are some high-end air purifiers which does this.


I have already posted the graph of particle size distribution earlier today.
Anyway, there are UFPs but do not affect us directly as the mass ug/m3 for UFP is very low at our location.

Though yes, you might want to explore some higher degree of UFP filtration if you should live close to a major arterial road or expressway/expressway exit that are jammed with traffic during peak hour etc.

http://www.fire.uni-freiburg.de/se_asia/projects/airpoll.html

Air Pollution Caused by Large Scale Forest Fires in Indonesia 1997*

*Paper presented at "South-East Asian Land/Forest Fires: Science and Policy"-Workshop, organised by the Centre for Remote Imaging, Sensing and Processing (CRISP), 30 April–2 May 1998, Singapore

Angelika Heil

German Technical Cooperation (GTZ)

Strengthening the Management Capacities of the Indonesian Forest Ministry (SMCP)

Integrated Forest Fire Management Project (IFFM)


The size distribution of atmospheric aerosols is shown to have three modes with ascending size as illustrated in Figure 1. The life span of particles in the smallest mode, the nucleation mode, which corresponds to particle diameters() below 0.1 µm, is less than one hour because they readily agglomerate and coagulate and transmute into the next larger mode (accumulation mode). The accumulation mode consists predominately of agglomerated and coagulated particles as well as particles from secondary condensation processes and comprises particles from 0.1 to 1 or 2 µm. Particles in this mode have, with up to weeks, the longest residence time in the atmosphere and can travel long distances (hundreds to thousands of kilometres). Their elimination out of the atmosphere is mainly due to precipitation [6,7]. Natural sources determine the composition of coarse() particles with a diameter of more 2.5 µm. Those particles sediment within several hours up to a day out of the atmosphere

 

[NWT1978]

Sharp AP filter since switching on last Thursday

it was white one and now it slightly black

N95 masks or AP sales

http://list.qoo10.sg/gmkt.inc/Speci...624893,413184933,414613408&jaehuid=2000172521

http://list.qoo10.sg/item/SHARP-SHARP-AIR-PURIFIER-FU-A28E-HIGH/424644103

 

[WussRedXLi]

NWT1978, that is not slightly black.

That is quite black in colour liao. LOL!

 

[WussRedXLi]

And that's only 85% H10. LOL!

 

[Lucky177]

Not surprise. Same goes to my AP. My Honeywell HEPA filter wasn't that black since the last check. Yesterday I opened up, it was black.

Imagine your lungs if don't wear mask outside, at home windows open big big, no AP...

(Both inner and outer ring are white in color when brand new, unused)

Sent from Android Mobile using GAGT

 

[NWT1978]

NWT1978, that is not slightly black.

That is quite black in colour liao. LOL!

need to wait till filters arrived so continue using it turn coffee black lol

And that's only 85% H10. LOL!

so fast turn colour... only H10

maybe it will turn back to white when not using lol then we can called it magic filter that last for years lol

 

[nwh_sg]

Blowing air through the 3M filter with a portable fan, this is what I get after one night placing it in our aircond bedroom:

Right one is a new one for comparison.
Its spec says it filters 3 micron particles and above.. so still have PM2.5 to worry. time to get another air purifier.

 

[grapefruitjuice]

HI all.. I got an Europace 406Q (the only ones available at my Best Denki).. Can I still customise HEPA filters to change?

 

[WussRedXLi]

HI all.. I got an Europace 406Q (the only ones available at my Best Denki).. Can I still customise HEPA filters to change?

Yes, of course. Any brand, any model of air purifier can be done, as long as it's not > 60mm filter depth or cylindrical in shape.

Even circular ones can be customised.

 

[grapefruitjuice]

Thanks bro!

 

[WussRedXLi]

Hey, new findng for the Samsung AX40.

(1) The filter depth is 40mm.
So the Taobao customised HEPA of 45mm ain't that deep anyway. Coz the PP media that TB uses is quite a bit more restrictive than the good stuff that original manufacturers like Sharp/LG/Samsung use. Despite being only about 97% efficient @ 0.3microns vs 99.9+ @ 0.3 microns measured for the Samsung with my laser particle counter.

I need to spec the Taobao filter to 60mm in order to increase 10% airflow above the 40mm Samsung HEPA filter. 45mm Taobao HEPA would still be a wee bit below in airflow compared to the 40mm Samsung HEPA.

Of course, all these are masturbation specs. It doesn't really matter much in real life. The Samsung AX40 easily does 10-15 ACH in the bedrooms depending on whether yours is new BTO or old resale (factored in furnitures liao).


For those who have been using the AX40 for quite a while, eg since 2014 haze season, you might wanna use a sharp knife to separate the Activated Charcoal filter from the HEPA.

Before separation measurement. 15.42kph.
After separation measurement. 16.41kph

Increase in airflow = 6.4%.

That's an increase of 20.7 m3/hr, or say 323m3/hr -> 343 m3/hr.
Don't worry, the GAC already would have lost its effectiveness in about 3 months of usage.

Cut along the black masking tape with a pen knife. Do not rip out the PU foam as that's the HEPA seal.

 

[kimsim]

Did you guy turn on ac or without AC for all the way?

 

[WussRedXLi]

The same goes for other air purifiers. Take out the activated charcoal filter during such haze seasons for max filtration. Esp if your house does not have a VOC issue anyway.

 

[WussRedXLi]

Did you guy turn on ac or without AC for all the way?

Mostly is turn on the AC. On the cooler days, say 24 hours period.....about 30% turn on esp during day time when it is warmer. Else how to tahan with the windows closed....fan also limited use