Air purifier? - Part 2

Lucky177

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Actually the AX40 filters still ok what. These are still very high quality (in terms of consumer speak) H13 filters, though not originals.
More than enough for Singapore use.

$55 each shipped.

http://list.qoo10.sg/item/SAMSUNG-S...EMENT-FILTER-ADDITIONAL-DB94-03899A/442622329

Didn't see this one. Thank you for sharing. :)

I used to buy from the usual Happy**** etc. Now his shipping fee for filters is :s22:

Anyway me already switched to XiaoMi. My last final AX40 set now act as spare liao. Get too used to the wireless Mi mobile app. :s13:
 
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RalliFTO

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Can't seem to find the replacement AX40 filters in Taobao. Tried the link provided in this thread but it's no longer available.
 

WussRedXLi

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Can't seem to find the replacement AX40 filters in Taobao. Tried the link provided in this thread but it's no longer available.

DIY cut HEPA. You can fit into the Samsung AX40 (cavity 320x280mm) so (1) you'd need to cut (2) there is a hole, fill it with the plastic bubble wrapping that is packing the HEPA, roll it up, shove it in...use a ruler etc.

5-10 min job max.
Efficiency around 90-95%. It filters Indon haze, no worries, tested with laser particle counters in particle mode. Don't expect CADR to be same as originals, of coz. Change it out every 6 months, no issue.
There is a smell to the filter due to the media/hot glue use that goes away in 24-48hrs. Non toxic, no worries.....if really scared of such MIC stuff just leave a gap in your windows or "Burn it in" in free air first for a day or 2.

300 x 300 x 25.

RMB 29 now. Used to be RMB 25.
https://item.taobao.com/item.htm?spm=a312a.7700846.0.0.xSebbT&id=41163239668&_u=f1u0hcibadd4


TB2BtCpkFXXXXbZXXXXXXXXXXXX_!!534872515.jpg
 

WussRedXLi

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Other than air purifier, changing of bedsheets/pillow case, HEPA vaccuming, another main cause for bad indoor air quality could be the aircon with its black mold, fungi growth. Or just harbouring dust + dust mite dropping allergens.


Can try cleaning it out with an aircon cleaner (aerosol spray application).
Cheap enough for trying..... (DIY shop ones are ex)
https://carousell.com/p/walch-aircon-cleaner-disinfectant-car-and-home-aircon-89558911/


Those with regular upper respiratory infections, rhinitis, asthmatics can try to clean and disinfect your aircon fan coil unit regularly as well. It makes sense since it is in the active airflow route. At least 1 month once would be nice + HEPA filtration, changing of sheets.

Remember, office HVACs is not a good indication vs home AC, coz the AHUs generally have some form of filtration already, maybe a F8 filter? I have seen such AHUs before in my coy with the MA and techs cleaning out/changing.....but my office is a grade A big commercial building, though i think smaller ones are same as there are codes.
Anyway, many have measured indoor office vs outdoor air quality during haze season with laser particle counters, they confirm have decent filters (not home AP HEPA grade of coz, not even to the cheap Taobao HEPA filters filtration level).



For Singapore typical homes furnishings and setups with not much of carpets etc, we usually don't have large quantities of mold/fungi but the "wet" aircon + usually high relative humidity are the main culprits and can harbour a decent amount if you don't clean it out regularly.

I more or less cured my 30 years of chronic allergic rhinitis with aircon cleaning and disinfecting + HEPA air purifier. Years of GP and specialist visits and $$$ no use at all. Why use antihistamine medications/surgery to reduce symptoms when you really need to eliminate the root cause? After you eliminate the root cause by taking out the allergen, your body properly heals coz no often inflamed, over a long period it'd take a much higher threshold to trigger that next attack of allergic rhinitis.
But i don't want to give false promises, unfortunately for a few pax, that full recovery is not possible, it stays with you for life, though it may improve somewhat in the threshold triggering level. For me it has improved heaps.

When people say that they cannot stand the aircon cold air and low humidity (50% RH low humidity?), it could be partially true only. Coz I have no issue travelling to Taiwan, HK...initial touchdown at 20 deg C only no issue with humidity that could be even lower. It'd take winter places like Seoul, JP, Beijing to really trigger the dripping.

A bit of fear-mongering here, but trust me it's not good stuff if you have good amount of it.




walch_aircon_cleaner__disinfectant_car_and_home_aircon_1487119606_f41fb74c.jpeg


walch_aircon_cleaner__disinfectant_car_and_home_aircon_1487119607_19f2d01a.jpg
 
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WussRedXLi

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Didn't see this one. Thank you for sharing. :)

I used to buy from the usual Happy**** etc. Now his shipping fee for filters is :s22:

Anyway me already switched to XiaoMi. My last final AX40 set now act as spare liao. Get too used to the wireless Mi mobile app. :s13:


I'm still on the AX40, Sharp, Mfresh, just nice air cleaning in my space. No extra room to use that extra AX40, else would have gotten it for just $60, take 60 mins to open and scrub it down real nice....enjoy liao.
 

Mach3.2

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I'm still on the AX40, Sharp, Mfresh, just nice air cleaning in my space. No extra room to use that extra AX40, else would have gotten it for just $60, take 60 mins to open and scrub it down real nice....enjoy liao.
Quite easy to open and clean as compared to my neighbour's sharp AP, bo bian had to open because a xiao qiang somehow got in, usually kept the top covered, no idea how it got in lol.
 

Jurong640

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Quite easy to open and clean as compared to my neighbour's sharp AP, bo bian had to open because a xiao qiang somehow got in, usually kept the top covered, no idea how it got in lol.
What. Xiaoqiang went in as its too clean and fresh inside? :s13:
 

Jurong640

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I saw tmall selling original xiaomi filters. Green one. $37 before shipping. Can use ezbuy to buy. You guys think its worth to buy from there? Qoo10 seems very few choices
 

wad3v3r

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Just wanting to ask the laojiaos here.. does a HEPA air purifier actually reduce dust in the room..?

I live near main road so my room kinda gets dusty in quick succession.. Was thinking of getting the $60 ax40 that wussredxli recommended just to test out but he lives kinda far


So asking for opinions here

Ps i rarely open my windows and keep my doors mostly closed
 
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Jurong640

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Just wanting to ask the laojiaos here.. does a HEPA air purifier actually reduce dust in the room..?

I live near main road so my room kinda gets dusty in quick succession.. Was thinking of getting the $60 ax40 that wussredxli recommended just to test out but he lives kinda far


So asking for opinions here

Ps i rarely open my windows and keep my doors mostly closed

from my experience, i bought xiaomi air purifier last month, it has HEPA filter. The room air feels more fresher. Today is just nicer 1mth, i took out the filter and check :eek:, there are layers of dust there, hence, from personal experience, it works, even tried for a really stuffy room, after purification, air is fresher and lesser dust.
 

kandinsky

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Just wanting to ask the laojiaos here.. does a HEPA air purifier actually reduce dust in the room..?

I live near main road so my room kinda gets dusty in quick succession.. Was thinking of getting the $60 ax40 that wussredxli recommended just to test out but he lives kinda far


So asking for opinions here

Ps i rarely open my windows and keep my doors mostly closed

Definitely does help to reduce. Have tested with one of those taobao WCLH particulate testers. I also keep windows and doors closed most of the time, even then there will be a certain level of indoor dust.

Just did a quick test. Living room without AP on, value for PM2.5 is 15-20. Bedroom with AP on (AX40), value for PM2.5 is 1-2.

Indoors, common sources of dust include dead skin and hair cells from humans, the carcasses and waste products of microscopic creatures such as dust mites, as well as worn down bits of clothing and furniture. Dust is unavoidable because all solids slowly wear down.

http://sciencequestionswithsurprisi...when-the-doors-and-windows-are-always-closed/
 

WussRedXLi

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Just wanting to ask the laojiaos here.. does a HEPA air purifier actually reduce dust in the room..?

I live near main road so my room kinda gets dusty in quick succession.. Was thinking of getting the $60 ax40 that wussredxli recommended just to test out but he lives kinda far


So asking for opinions here

Ps i rarely open my windows and keep my doors mostly closed


$30 max taxi/uber/grab fare to and fro still worth it. Ask him to carry down to lobby and you just collect it. Or you travel to nearest MRT and then take a cab to collect from his void deck.

It's the quietest (it's not silent and very light sleepers still would notice the noise) and most energy efficient per m3/hr airflow AP out there. And it's a workhorse.
And lowest recurrent cost if you use the 300x300x25mm Taobao HEPA and DIY cut a bit, which works as tested with laser particle counters.... either that or the 300x400x25mm filters if you don't like leaving any holes so that you need to plug that up....just 9 rmb difference now, coz the 300x300 increased price liao.

And original filters are available at SGD55 shipped from qoo10.

No bells n whistles like wifi though.


Samsung AX40 with original filters does low 300+ m3/hr, CADR maybe 300 m3/hr?
Samsung AX40 with Taobao filters does about 260 m3/hr airflow, CADR maybe 200 m3/hr and that's v conservative already. At 19W power consumption as per measurement at the socket measured by me, and at a lower noise level vs Xiaomi AP2 @ 200 m3/hr setting.
Take it as a medium-high fan speed mode on the AX40.


AX40 and TB filters more than enough for BTO really small new rooms, does ACH of about 8-12 ACH for those rooms after factoring in the furnitures and cabs. This is good enough for even the worst allergic rhinitis sufferers who can sneeze like 20-40 sneezes 1 shot.

With original Samsung filters, it's good enough even for cases like preterm infants suffering from heart/lung issues if you are using in the BTO bedrooms or MBR, but as always, pls check and remove all possible sources of contamination first as they make a very big difference in the actual achievable air quality. Eg, Sharp original filters does 83% filtration of PM0.1 as per *ACTUAL* lab measurements (not claimed manufacturer specs, they don't give PM0.1 specs anyway in the first place).

As always, pls allow a certain amount of ACH with external air, to get rid of the CO2 and stuff. ie leave a certain gap at the windows, maybe 5mm...still quite windy nowadays so that's more than enough.


AX40 and TB filters also good for regular to even somewhat sensitive pax in MBR.


You can leave the AX40 switched on 24/7 for weeks at a go, probably months no issue too. No issue. Motor temps are pretty low esp with the TB filters coz lower power setting.
What i call a bloody workhorse. Same goes to the Sharps.
 
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WussRedXLi

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You can google about the effects of chronic exposure to traffic vehicular pollution with regards to distance and height from the main roads. Got a fair bit of info....

Even youtube also got some vids on that.
 

WussRedXLi

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Visible dust from the main road is not an issue. I know the "feeling" coz my wife long ago last time used to live @ Sims Drive Blk 56, about 40m from PIE. Fugging "dusty".
Your nose hairs and lungs' cilia would take care of those.

It's the PM2.5 and even PM1.0 from the traffic that you should be concerned about, long term chronic exposure, though the levels are not very high over here in Singapore. But it would be definitely be higher than someone who lives high floor and/or > 300m away from any main road.
 
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