Air purifier?

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Any idea on the effectiveness of AIRVAX 33X2, and Novita NAP 101, 103? I know they're not certified HEPA air filters though.

Anyway I just want to thank all in this thread, especially those who provide valuable information. One sad thing is that while we who can access this thread probably can afford a purifier, there are so many in Singapore who can't, not to mention Malaysians and the Indonesians at the epicenter of the haze. We can't possibly arm everyone with an air purifier, or wrap an entire country in a giant bubble. Why ah why? The best hope lies in the incoming Indonesian president. Hope he's serious about combating illegal burning and forest fires.
 

Supersen

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i bought europAce and till now so far its working good for me, anyone using this model EPU 81P air filter too? :s11:
 

WussRedXLi

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Any idea on the effectiveness of AIRVAX 33X2, and Novita NAP 101, 103? I know they're not certified HEPA air filters though.

Anyway I just want to thank all in this thread, especially those who provide valuable information. One sad thing is that while we who can access this thread probably can afford a purifier, there are so many in Singapore who can't, not to mention Malaysians and the Indonesians at the epicenter of the haze. We can't possibly arm everyone with an air purifier, or wrap an entire country in a giant bubble. Why ah why? The best hope lies in the incoming Indonesian president. Hope he's serious about combating illegal burning and forest fires.

That's true. My in-laws and wife are Indon-chinese (near Dumai area in Riau). There are many who are (1) do not know the dangers and don't have knowledge (2) just cannot afford proper protection. It's way worse there.

Feb and March 2 months....Riau province - 50k population seeked medical help in hospitals. In Pekanbaru, several thousands of residents fled the city. This haze was like 10X worse than 2013 June. 2013 was only 1-2 weeks. This one is 1-2 months and also denser + bigger in size. NE monsoon was blowing then, else Singapore = goner. This could possibly be a black swan event for Singapore and can quite possibly cripple the economy..

Sep 1 month, Palembang city alone with a population of 1.5 mil got 4.5k population seeking medical help in hospitals.

Not talking about GP taking MC for singaporeans here. :zotto:
 

jimboyboy

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They are around the same.

Next time you can DIY cut some HEPA filters that you can get on taobao, then scotch tape the sides to eliminate bypass. They have been measured to perform at around HEPA 11 (95%) and HEPA 12 (99.5%) efficiencies. The stock one is H13, or 99.95%.
All will work, not much diff in the real world.

So the DIY one is suitable for any consumer model, including the LG LA-Q370S?
 

WussRedXLi

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Pekanbaru Residents Flee Haze-Hit City for Hometowns - The Jakarta Globe

By Vidya Dahlan on 11:55 am Mar 15, 2014

As the haze from forest fires across much of Riau pushes the air quality index to dangerous levels, residents are opting to leave the province, while those staying behind are trying to cope amid a dearth of government advisories.

Yolanda Eviyonita, a third-year student at Riau University who is originally from West Sumatra, said on Friday that the rush to leave Pekanbaru, the provincial capital, was so intense that it took her six hours just to get a bus ticket to her hometown of Bukittinggi.

“I waited from 8 a.m. to get a ticket to Bukittinggi. Every trip there was fully booked,” she told the Jakarta Globe. “I finally managed to get a ticket at 2 p.m. and left the city at half past two.”

She was among those heeding the advice of Pekanbaru Mayor Firdaus on Thursday for those not from the city to return to their hometowns until the air quality had improved.

The city administration has called on people to use masks when outdoors, but residents say there has been no medical advisory on the dangers of prolonged inhalation of the heavily polluted air.

“There’s been no awareness campaign whatsoever by the city administration about what the haze could do to our health if we keep breathing it in,” said Dolly Enniza, a homemaker. “The officials just tell us to use masks whenever we go outdoors.”

Dolly said the heads of her neighborhood unit and community unit were constantly reminding residents to keep their children indoors to prevent them developing respiratory problems.

For the past week, Dolly said that her children had also been instructed by their schools to stay at home. The air quality index has hit hazardous levels in the past three days.

“The smell of the smoke comes into the house through the ventilation. We don’t even see the sun anymore,” Dolly said.

She added the smoke hurt her nose and eyes, even when she was in her car.

Hamdan Abubakar, who has lived in Pekanbaru for two years, said the local people seemed to have become accustomed to the annual haze problem.

“Before this they never seemed to be bothered by the haze because they have grown accustomed to it for years,” he said on Friday.

“Now people are angry because they can hardly see anything. Today, from around 3 p.m. to 4 p.m., the haze was so thick that visibility dropped to about 50 meters when I was out driving.”

Hamdan said he planning to leave the city as soon as possible.

He blamed logging companies for causing the haze, and suggested that the government bill them for the cost of cloud-seeding efforts to induce rains to combat the forest fires raging across the province.

“They are the ones who have benefited from their permits, so they should pay for weather modification to make artificial rains. The people of Riau are just victims,” Hamdan said.

He commended residents for taking to the streets to hand out face masks for free to motorists at traffic lights.

“Students, volunteers and NGOs and political parties are handing out free masks,” he said.
 

WussRedXLi

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So the DIY one is suitable for any consumer model, including the LG LA-Q370S?

Cut it to size and stuff it in....the side "lobangs" just stuff with tissue/PU foam, stick with sticky tape. Take note of the depth, just get close to it and ensure the cover can close can liao.

Will work, I tried before. Just FYI now, put on your thinking cap later. Of coz if you can afford original then go for it.
 

WussRedXLi

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I'm looking at samsung ax40 vs. winix wacu300. How many votes go to the Samsung vs. the winix?

Check the power consumption of both units. I believe the Winix units are slightly less energy efficient. Not sure about other factors like noise etc.


Anyway...

24-hr PSI (PM2.5) hit 124 = 78 ug/m3
157724046.Y60Bg6Cr.oct27_24hrA.jpg


157724045.xTItVIWj.oct27_24hr.jpg
 

WussRedXLi

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You can see that

61 ug/m3 = PSI 107
67 ug/m3 = PSI 113
70 ug/m3 = SI 116
77ug/m3 = PSI 123
78 ug/m3 = PSI 124

So in future, can do some pretty accurate guesstimation for PSI already if you take the 1-hr PM2.5 concentration figure from NEA.

1hr concentration -> AQI is of course no issue, with the help of the AQI calculator.


Edit - 9AM 7 Oct Tue, West regions still at 58 ug/m3 for the past 2 hrs.
 

addats

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Is the Sharp $99 on Qoo10 affective with the haze. It is not a HEPA filter. think of buying 1 for the baby room.
 

WussRedXLi

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Is the Sharp $99 on Qoo10 affective with the haze. It is not a HEPA filter. think of buying 1 for the baby room.

It is effective, 100% suitable for SG haze. It is H10...HEPA10. Ie 85% efficiency at 0.3 micron maximum penetration particle size (MPPS)

Taobao filters are H11 to H12. Some are H13. You can get ULPA U15 to U17 even. 0.12 microns MPPS at 99.9997%.
 

chuanz

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so if we want better filtration just buy from Tabao and DIY? Ok got it. Thanks

For practical purpose, in HDB room, H10 good enough liao... change only when due, no need rush for "upgrade".
 

addats

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My concern is whether the filter is able effectively filter out the particles especially my child is only 2 years old
 

stam

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What's the recommended HEPA to buy from taobao? Anyone have regular reliable seller to introduce? 1st time trying to buy something from tabao. Thanks.
 

mosmos

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Is the Sharp $99 on Qoo10 affective with the haze. It is not a HEPA filter. think of buying 1 for the baby room.

is a hepa filter, yes can use during ytd. i use it in 5 rm flat living room with no aircon + closed window, removed the haze smell within a few mins~
 

chuanz

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My concern is whether the filter is able effectively filter out the particles especially my child is only 2 years old

Hmm... let me try this... I not selling SHARP or what ar...

This is a calculation comparing between 99% and 85% filtration based on PM2.5 concentration and converted into equivalent AQI values for easier visualization.

1zTgWyf.png


Sharp A28E spec'ed airflow @ 168 / 108 / 48 m3/hr

HDB room size say, 4m x 4m x 3m (?) = 48m3.
At max setting for A28E, you are looking at 3.5 air change per hour. Based on the table above, air is practically "Good" after 30 mins, and there is probably no practical diff after 1 hr.
 

WussRedXLi

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so if we want better filtration just buy from Tabao and DIY? Ok got it. Thanks

Sort of. But in real life for our haze usage, you won't notice the diff.

For the benefit of others, i give this real life example....6 Oct Monday Hari Raya.

1-hr PM2.5 concentration readings (not AQI, not PSI)
For baby room usage, say we try to keep it below 35 ug/m3.

From 10AM onwards, you see the rise. Switch on the Sharp A28 and keep it switched on in the bedroom till this morning.

Can liao.

(graph done by bro Chuanz)

157718154.1nKJ1Slc.5.jpg
 
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WussRedXLi

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Links

NEA 1-hr data. Second section
Pollutant Concentrations

Graphical representation link (eg the pic that i attached above), done by bro Chuanz.

Fuzzy SG

PS. Those Unhealthy, Unhealthy for Sensitive Groups, Very Unhealthy level advisories, are levels issued by USA EPA, USA Environmental Protection Agency.


Keep it simple, just follow....won't go wrong.
 
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