Air purifier? - Part 2

[vofzxy]

All these H11, H10, TB generics have been tested before by quite a few folks here. They do just fine with indonesian haze or even cigarette smoke. Cigarette smoke in particular has nothing above 0.6/0.7 microns (the chinese laser particle counter modules react to cigarette smoke just fine, sensitive enough). The usual indon, malaysian haze is no issue, though chemical pollution is another matter of course (pls see previous pages).

The numbers that you really should look out for is replacement filter cost (esp if you are doing multiple units due to kids/elderly), noise/wattage, CADR. The filter cost is recurrent and do add up over time costing a few times more than the unit.
eg the air purifier units are just a one-time cost, but I'd also be spending over 1k on branded replacement filters annually in total. And i have been using APs since 2007.

Of course, if you are a successful pax earning 5-6 figures monthly, then no worries disregard my posts then.
.
.
.

back in 2016 when the haze came back and whack everyone, i bought the samsung AX40
that time go no xiaomi, this time round samsung air purifiers like no sight no sound

i believe last time i bought my ax40 at SGD 70 80
this time round my replacement filter is SGD 50

=(

 

[MIVEC525]

You still in this thread!

Is it still working?

My Samo Air temperature and RH% sensor went bonkers already. Luckily the laser module still working.

Yup working fine.....lol

 

[laeticia]

Also, my house is just 95 sqm. For those in penthouses or landed, with the living room area already at say 180 sqm and bedroom at 60 sqm, it might be a different story.

I got a sore throat yesterday, dunno if its related. Trying to keep Ax40 on high but it's loud

back in 2016 when the haze came back and whack everyone, i bought the samsung AX40
that time go no xiaomi, this time round samsung air purifiers like no sight no sound

i believe last time i bought my ax40 at SGD 70 80
this time round my replacement filter is SGD 50

=(

^5. I bought 3 Samsung AX 40 back then!

I'm the only person using it regularly so gonna get 3rd party filters the next time I need replacements. Still using my stockpile.

 

[reallyworry]

hi guys, any good air purifiers beside xiaomi one?

 

[UltraWoman]

Everything is about CADR, clean air delivery rate.

Roughly in theory CADR = air flow x filtration efficiency

Doesn't matter if the filter can remove 100% of the dust if the air flow sux.

Just look at Dyson purifier fan, they keep harping on their best filter but their airflow is poor since there is a huge bypass. That's why they don't publish CADR.

what is your definition of good airflow ? how many m3 per hr ? for lets say a normal 4 room flat, living + corridor + kitchen less than 35 m2

 

[UltraWoman]

hi guys, any good air purifiers beside xiaomi one?

i read through a few pages, the more recent ones, seems like this thread swings towards Xiaomi APs
which I dont really like due to their filters, which I believe the dudess above already had a rebate.

so reading a few pages, it was concluded that Xiaomi filters can also do the job despite not being True Hepa.

I am no guru, so in depth details I wont know, so my next questtion will be in that case what does Xiaomi filter cant filter ? so what say about the international standards on filters rating ?

 

[vofzxy]

I got a sore throat yesterday, dunno if its related. Trying to keep Ax40 on high but it's loud



^5. I bought 3 Samsung AX 40 back then!

I'm the only person using it regularly so gonna get 3rd party filters the next time I need replacements. Still using my stockpile.

What's 3rd party filters lol
Even the ones from taobao also about 200 RMB

Sent from HUAWEI VOG-L29 using GAGT

 

[UltraWoman]

What's 3rd party filters lol
Even the ones from taobao also about 200 RMB

Sent from HUAWEI VOG-L29 using GAGT

AX40 3rd party those that doesnt require self cutting or 定制, only 12X RMB leh

 

[vofzxy]

AX40 3rd party those that doesnt require self cutting or 定制, only 12X RMB leh

Sugoi

Got URL to SIC or screenshot ?

Sent from HUAWEI VOG-L29 using GAGT

 

[UltraWoman]

Sugoi

Got URL to SIC or screenshot ?

Sent from HUAWEI VOG-L29 using GAGT

https://detail.tmall.com/item.htm?id=576464313123&spm=a1z09.2.0.0.9fa52e8dw600PG&_u=h102dl7s3c3a

 

[WussRedXLi]

AX40 3rd party those that doesnt require self cutting or 定制, only 12X RMB leh

Yep....my source for customised 320x285x45mm is rmb 120 also.
The guy even threw in FOC 顺丰 china delivery to warehouse as same province, he said safer. So the profit is there, and some folks might wanna haggle if buying 4pc.

But i just get the rmb 25-30 300 x 300 x 25 ones, ok liao. Use and throw, don't have to fuss.

i read through a few pages, the more recent ones, seems like this thread swings towards Xiaomi APs
which I dont really like due to their filters, which I believe the dudess above already had a rebate.

so reading a few pages, it was concluded that Xiaomi filters can also do the job despite not being True Hepa.

I am no guru, so in depth details I wont know, so my next questtion will be in that case what does Xiaomi filter cant filter ? so what say about the international standards on filters rating ?

UFPs, 0.01-0.1 microns (10nm - 100nm) thereabouts, some types of photochemical smog, in other countries, eg Klang Valley, Shanghai, Beijing etc..
http://www.jesc.ac.cn/jesc_en/ch/reader/view_abstract.aspx?file_no=2014260918&flag=1

https://www.sciencedirect.com/science/article/pii/S1001074214000886


Of course the higher-end APs salesperson would wanna tell you that Xiaomi and even branded ones from Philips/Samsung cannot handle some types of air pollution, which is not incorrect.


0.1-0.15 microns range Xiaomi can still handle decently esp if it's a Xiaomi MAX.
I know Sharp's H13 HEPA was lab tested to be 85% efficient at 0.1 microns, incidentally it's from the Dyson AP promo video, though the Dyson can handle iirc 99.xx%. But again, CADR also matters in the real world. We need to look at the whole picture.


(actually if you ask me, it is still not a true H13 HEPA, just a very very very good H12, and so are Samsung's original filters etc). Truly H13 filter and system certification needs to be DOP tested as a whole system for use in a cleanroom. So seriously, do you really need that kind of filter standard in your house in reality?


Also, when trying to do 0.1 microns or UFPs, it is imperative not to switch it on to MAX fan speed. What is key is the airflow speed over the pleated filter media. 0.1 microns and below is filtered via diffusion method, and that works best at lower airflows. HEPA works by intercepting PM via interception, impaction and diffusion.



If you have someone in your family that has very high stroke risk, cardiac issues, COPD, severely asthmatic in which the inhalers might not help and thus needing emergency visit to the A&E or GP (and if the GP's closed then good luck), then you might wanna invest in those Cleanroom FFUs with U15-U17 filters i mentioned earlier..
This is especially so if your house is near to the expressway/major roads etc.
That's the only thing i can think of.

 

[WussRedXLi]

Since it's the haze period, let me tell you guys a story, this kinda debates is not the first time that surfaced on this thread and not the last time. I can tell you the debates happened more than a dozen times in the past (part 1 etc).


Also, this Air Purifier thread used to be in EDMW forum, before it got shifted into the Home n Decor Furnishings forum, coz someone complained to the mods and it got shifted. I also got a warning.
This AP thread was getting so much exposure then, that some "folks" are not happy as it'd impact their sales etc.


So for the last tine, if you ask me, for haze and even cigarette smoke, Xiaomi H11, H12 is sufficient. TB generics is sufficient, as tested personally with cigarette smoke and local haze. Other pollution sources particular in your case, you ownself go research.

I am also not a Xiaomi fan, actually i have been posting even before Xiaomi came out with APs. Just that Samsung stuff is expensive nowadays relative to XM (or rather XM has dropped in price), and to get as cheap Samsung stuff = going to carousell. Or for that matter, any branded 2nd hand AP, from Sharp to Novita to Philips.
I can tell you, the lower income source is especially vulnerable, at least i know some folks during 2015 haze season they were helped.

So generally i think other than the really low income group having a low budget, i'd not point folks to go get from carousell and then open it up and ownself scrub with alcohol to clean the internals (it is a bit time consuming and a fair bit of effort needed). Filters no issue, just use TB generics.

 

[passingbye]

https://detail.tmall.com/item.htm?id=576464313123&spm=a1z09.2.0.0.9fa52e8dw600PG&_u=h102dl7s3c3a

Thanks for sharing! Can order a few pcs to keep

 

[laeticia]

What's 3rd party filters lol
Even the ones from taobao also about 200 RMB

Sent from HUAWEI VOG-L29 using GAGT

Made for Samsung but no brand lor. Qoo10 has one

https://qoo.tn/BRnEgU/Q107272722

$39 after $5 green member coupon and 500 qpoints

 

[vofzxy]

Made for Samsung but no brand lor. Qoo10 has one

https://qoo.tn/BRnEgU/Q107272722

$39 after $5 green member coupon and 500 qpoints

https://detail.tmall.com/item.htm?id=576464313123&spm=a1z09.2.0.0.9fa52e8dw600PG&_u=h102dl7s3c3a

Sugoi
Thanks everyone for the SIC

Need to fast hand fast leg before golden week �����

Sent from HUAWEI VOG-L29 using GAGT

 

[noobiee]

just wondering if anyone willing to help buy from taobao for the AX40 hepa filters...

can collect in raffles place~

 

[Shib]

Anyone has experience with the new Sharp series? G40 or J40?

Sent from HUAWEI EVR-L29 using GAGT

 

[hiton]

Does the Xiaomi 2s comes with HEPA filter?

Update: found my answer. It seems that the conclusion is that it will still do the job to filter pm2.5.

From what I found online.

The Mi Air Purifier 2S implements an H11-grade HEPA filter, which can offer protection from particulate matter PM2.5 or particles with a diameter of approximately 2.5 microns

 

[orangeman]

Yep....my source for customised 320x285x45mm is rmb 120 also.
The guy even threw in FOC 顺丰 china delivery to warehouse as same province, he said safer. So the profit is there, and some folks might wanna haggle if buying 4pc.

But i just get the rmb 25-30 300 x 300 x 25 ones, ok liao. Use and throw, don't have to fuss.





UFPs, 0.01-0.1 microns (10nm - 100nm) thereabouts, some types of photochemical smog, in other countries, eg Klang Valley, Shanghai, Beijing etc..
http://www.jesc.ac.cn/jesc_en/ch/reader/view_abstract.aspx?file_no=2014260918&flag=1

https://www.sciencedirect.com/science/article/pii/S1001074214000886


Of course the higher-end APs salesperson would wanna tell you that Xiaomi and even branded ones from Philips/Samsung cannot handle some types of air pollution, which is not incorrect.


0.1-0.15 microns range Xiaomi can still handle decently esp if it's a Xiaomi MAX.
I know Sharp's H13 HEPA was lab tested to be 85% efficient at 0.1 microns, incidentally it's from the Dyson AP promo video, though the Dyson can handle iirc 99.xx%. But again, CADR also matters in the real world. We need to look at the whole picture.


(actually if you ask me, it is still not a true H13 HEPA, just a very very very good H12, and so are Samsung's original filters etc). Truly H13 filter and system certification needs to be DOP tested as a whole system for use in a cleanroom. So seriously, do you really need that kind of filter standard in your house in reality?


Also, when trying to do 0.1 microns or UFPs, it is imperative not to switch it on to MAX fan speed. What is key is the airflow speed over the pleated filter media. 0.1 microns and below is filtered via diffusion method, and that works best at lower airflows. HEPA works by intercepting PM via interception, impaction and diffusion.



If you have someone in your family that has very high stroke risk, cardiac issues, COPD, severely asthmatic in which the inhalers might not help and thus needing emergency visit to the A&E or GP (and if the GP's closed then good luck), then you might wanna invest in those Cleanroom FFUs with U15-U17 filters i mentioned earlier..
This is especially so if your house is near to the expressway/major roads etc.
That's the only thing i can think of.

Can share your seller?

Also i thought the thicker the HEPA the better?

 

[Plastick]

anyone using the xiaomi shimi pm2.5 or mijia pm2.5 detectors?