Air purifier?

[tmkedmw]

NEA website pm2.5 1hr reading until 12nn. Nobody key in data liao?

 

[chuanz]

NEA website pm2.5 1hr reading until 12nn. Nobody key in data liao?

Mebbe the guy half day urgent leave

 

[tmkedmw]

Mebbe the guy half day urgent leave

Aqicn got 1hr pm2.5 readings - no stoppage.
NEA websai 1hr pm2.5 still showing reading stop at 9dec 12nn.

 

[WussRedXLi]

2015 anyone?

First El Niño in five years declared by Japan's weather bureau | Environment | The Guardian

2 out of 3 met. NExt month....4th Jan.

Is El Nino here? Not quite yet, scientists say | Earth | EarthSky

 

[tmkedmw]

Swift action on forest fires by President Jokowi | The Jakarta Post

Swift action on forest fires by President Jokowi
Wimar Witoelar, Jakarta | Opinion | Thu, December 11 2014, 10:04 AM

On Nov. 27, in the Riau Islands province, President Joko “Jokowi” Widodo studied the dried peatland and man-made canals that locals were building to prevent the further drainage of precious water in the peat. He held impromptu talks with victims of peat-based forest fires. The President made some announcements off the cuff. Obviously he had thought about the issues for some time.

President Jokowi said plantation permits had to be reviewed if they were indeed destroying the ecosystem; they would have to be terminated. “We must not allow our tropical rainforests to disappear because of monoculture plantations like oil palm,” he said.

In his remarks in Sungai Tohor, the President described the community-built canal dams as very good and that they must be made permanent. He further said it was best for peatland to be given to the community to be managed for sago.

Community management was usually environmentally friendly, while companies tended to turn forests into monocultures such as acacia and oil palm, Jokowi said. “Canal blocking will keep peatland areas wet and prevent fires. It is important to keep the canal blocking permanently as in the idea which has been raised the public.”

Meanwhile, Riau University Disaster Studies Center director Haris Gunawan said forest-fire prevention through peatland conservation in Riau was part of an effort to resolve the prolonged haze issue.

There are four policy points that Jokowi highlighted after the Sungai Tohor visit: enforcement of the law related to the Compliance Audit findings on 17 corporate transgressors in the peatland of Riau, total protection of the peatland, strengthening and extension of the moratorium on permits, accelerate implementation of the one map policy that will force a consensus on territorial issues.

In a meeting before the site visit, President Jokowi responded to lengthy technical presentations with characteristic clarity. “We all know the problem.

Everybody knows the problem. Experts, government, law enforcers, corporations know the problem. It all boils down to one question: Do we have the will? Are we serious? I am. I am very serious. “Forest fires have been ravaging Riau province for 17 years. That, Jokowi says, means deliberate neglect.

The U-turn came swiftly. The president went to Sungai Tohor on Nov. 27. Less than a month before on Oct. 28, a group of citizens issued a petition inviting Jokowi to visit victims of peatland fires there. The State Secretariat and the Environment and Forestry Ministry were approached with an invitation to President Jokowi to visit an area besieged by fire and haze, representing the crisis all over Indonesian forests.

The invitation came with a plan and latest data. The minister brought the message to the President immediately.

Jokowi confirmed he had received reports from all quarters, including the Indonesian Military (TNI), the National Police, relevant ministries and regional administrations as well as conservation institutions, which said that all were familiar with the issue.

Hence there was no hesitation in the President’s crack down on the rampant deforestation and peatland destruction that has made the nation the world’s third-largest emitter of climate-warming carbon dioxide. The measures against the draining and burning of peatland will mitigate forest fires that have gone unabated for 17 years, pumping smoke across the entire region.

Make no mistake. There is no objection to palm-oil products. And we all appreciate the value of palm oil to our exports, but there are serious objection to the wanton destruction of forests and peatland for corporate profits.

Sustainable palm oil practices will later lead to a collision course between the industry and the environment.

Indonesia suffers more deforestation than any other country, including Congo and Brazil. Most of the deforestation in Indonesia was illegal, since the days of illegal logging and now with most being used for palm oil and pulp.

A drastic step such as this will invite opposition and nitpicking. People say bad people have strong backing from local law enforcers and government officials. Fear not, says Jokowi. Good people have the backing of the President.

The impromptu visit of President Jokowi jumpstarts sorely needed reforms in the forestry sector.

But more than that, it made the communities in Sungai Tohor feel good with fresh hope for the future.

Here at last is a president who cares; a president who translates words into action. The proof of the promise is here, if we let ourselves look without cynicism.

 

[WussRedXLi]

Inspiring action plans from the new president. Just have to hope for the best and expect the worst.

See if that pans out alright as he needs support across the board.

Coz Dec and Jan S Sumatra rainfall is expected to be in the 35th to 50th percentile, ie below avg. Riau normal though.
All these sets up next year's precedence.

 

[Asakura]

paper talks or not, we'll know come 2015. lol

 

[CyberMew]

So i just read through some of the pages... seems like the AX40H5000GMD is quite recommended here. Does this kill bacteria? or these purifiers trap only?

and qoo10 shows it for $285, and +S$78 for new filter. i assume the new filter is the spare filter, but then is that the normal price for the filter? how many filters are there in the machine at any one time?

appreciate the pros help, new to this..

 

[WussRedXLi]

So i just read through some of the pages... seems like the AX40H5000GMD is quite recommended here. Does this kill bacteria? or these purifiers trap only?

and qoo10 shows it for $285, and +S$78 for new filter. i assume the new filter is the spare filter, but then is that the normal price for the filter? how many filters are there in the machine at any one time?

appreciate the pros help, new to this..

Trap only. Bacteria will usually die. Issue is mold, but it'd take a while for it to smell lah, eg at least 9 months?

The machine can only take 1 filter. The product comes with 1 filter already, as with any other APs. 78 dollars is about 20% cheaper than regular retail (for other brands).

 

[CyberMew]

Trap only. Bacteria will usually die. Issue is mold, but it'd take a while for it to smell lah, eg at least 9 months?

The machine can only take 1 filter. The product comes with 1 filter already, as with any other APs. 78 dollars is about 20% cheaper than regular retail (for other brands).

Oh ok thanks a lot! very helpful! Still got a couple more questions.. i thought the unit has virus doctor which can kill the molds? or whatever stuff stuck inside? im afraid the air blow out will contains the germs/mold/etc

 

[WussRedXLi]

Oh ok thanks a lot! very helpful! Still got a couple more questions.. i thought the unit has virus doctor which can kill the molds? or whatever stuff stuck inside? im afraid the air blow out will contains the germs/mold/etc

Bacteria and most viruses are retained by the HEPA filter. Some iruses are very small, like the flu virus particle is actually 0.05 microns to 0.2 microns. Others are bigger, like varicella virus is 0.12 to 0.2 microns, which can be caught be HEPA13, but maybe not at the 99.95% efficiency. Nevertheless, it's going to be enough if you overspec the air purifier.

But they are "caught" simple because they are aerosolised and spread on the surface of bigger particles. Mold spores that are trapped may be activated and grow, thus compromising the HEPA structure element in a physical sense. It is this physical compromise, like what mold does to the top surface of a camera lens or telescope lens, that can cause the HEPA to leak.

Hence that is why you may have come across sites advising you to change your filter once every 6 months. But don't worry too much, 9-12 months period is fine.

The virusdoctor is "after" the HEPA. So is the case with all the others, like Sharp Plasmacluster.

 

[WussRedXLi]

Emergency Filtration Products

Filtration efficiency is the measurement of a filterís capacity to effectively remove particulates, such as virus and bacterium, from moisture or air over a specified period of time. It should be noted that the number of digits after the decimal point (i.e. .99 vs. .999) is a function of the test and not necessarily a reflection of filter performance. It should also be noted that it is common to challenge air filters at 0.3 microns during filtration efficiency testing on the premise that if water droplets, or other large particles, are removed from an air stream all pathogens are removed as well.
While it is obviously much easier to achieve a favorable result at 0.3 microns; it has been proven that relative efficiencies will diminish as the contaminates decrease in size (virus are much smaller than bacterium), when filters are subjected to higher volumes of airflow or higher quantities of particulate, and when filters are in use over a prolonged period of time. Efficiency is more meaningful then when stated in terms of percentage of efficiency and particulate size. To put this into perspective, the image to the left shows the relative differential between 0.3 microns and 0.027 microns (the challenge particulates size for 2H Technology testing) and the following chart demonstrates why testing below 0.3 microns in size is relevant

 

[WussRedXLi]

Bacteriophage ØX174 0.025 to 0.027 diameter
Test virus used by Nelson Laboratories to test 2H Technologyô filtration efficiencies

Hepatitis Virus (HBV) 0.042 to 0.047 diameter Hepatitis B
Adenovirus 0.07 to 0.09 diameter Respiratory Infections
HIV 0.08 to 0.11 diameter
Acquired Immunodeficiency Syndrome

Filoviruses 0.08 diameter
0.79 to 0.97 length Ebola Virus
Bunyaviridae 0.08 to 0.12 diameter Hanta Virus
Orthomyxoviridae 0.08 to 0.12 diameter Influenza A, B, and C

Coronaviridae (SARS-CoV)
0.10 to 0.12 diameter SARS

Varicella-Zoster Virus
0.11 to 0.12 diameter Herpes
Cytomegalovirus 0.12 to 0.20 diameter Pneumonia, Hepatitis, Retinitis, Encephalitis
Variola Virus 0.14 to 0.26 diameter
0.22 to 0.45 length Small Pox





Serratia Marcescens 0.45 diameter
Extraintestinal Infections,
Nosocomial Infections

Pseudomonas Aeruginosa 0.50 to 1.0 diameter
1.5 to 4.0 length
Endocarditis, Pneumonia, Osteomyelitis, Nosocomial Infections, Meningitis, Septicemia

Staphylococcus Aureus 1.0 diameter
Pneumonia, Osteomyelitis,
Acute Endocartis
Meningitis, Toxic

Mycobacteriumtuberculosis 1.0 to 5.0 diameter Tuberculosis
Bacillus Anthracis 1.0 to 1.5 diameter
3.0 to 5.0 length
Anthrax Infection

 

[WussRedXLi]

Bacteria and most viruses are retained by the HEPA filter. Some iruses are very small, like the flu virus particle is actually 0.05 microns to 0.2 microns. Others are bigger, like varicella virus is 0.12 to 0.2 microns, which can be caught be HEPA13, but maybe not at the 99.95% efficiency. Nevertheless, it's going to be enough if you overspec the air purifier.

But they are "caught" simple because they are aerosolised and spread on the surface of bigger particles. Mold spores that are trapped may be activated and grow, thus compromising the HEPA structure element in a physical sense. It is this physical compromise, like what mold does to the top surface of a camera lens or telescope lens, that can cause the HEPA to leak.

Hence that is why you may have come across sites advising you to change your filter once every 6 months. But don't worry too much, 9-12 months period is fine.

The virusdoctor is "after" the HEPA. So is the case with all the others, like Sharp Plasmacluster.

Ok, maybe I shall disclaim myself first. For those using HEPA filters critically, I guess the filter change frequency might need to be even faster. How fast, I have no idea.

Eg, your kid just had heart surgery. He needs to breathe ultra clean air for the next 6 months.


1. What is filtration efficiency?
Filtration efficiency is the measurement of a filters capacity to remove particulates, such as virus and bacterium, from air as it flows through the filter. Filtration efficiency is stated as a percentage of efficiency and is affected by such factors as size of the particulates to be filtered, volume of air and duration of use. An N-95 rated mask, for example, is 95% efficient at removing particles with a median diameter of approximately 0.3 microns at a volume of 85 liters per minute. Duration of use is a critical factor because virus and bacterium can infest the filter for extended periods of time. Bacteria can reproduce on their own while virus can survive for days before infecting a living host. Virus and bacterium can also move through filters over time resulting in an erosion of filtration efficiency and increase in the associated risk factors.

Emergency Filtration Products

 

[WussRedXLi]

Taobao hoots are here.

4pcs of Sharp A40/KC-840 filter. (32mm depth)
4pcs of Novita NAP501i filter (32mm depth, stock is 20mm nia....but I gotta trim this a bit)
1pc of Samsung AX40, customised.

 

[stam]

Taobao hoots are here.

4pcs of Sharp A40/KC-840 filter. (32mm depth)
4pcs of Novita NAP501i filter (32mm depth, stock is 20mm nia....but I gotta trim this a bit)
1pc of Samsung AX40, customised.

bro for the AX40 customised, what size did you order? did you include the charcoal?

 

[WussRedXLi]

Tried out the Samsung AX40 filter, good stuff.

I'd recommend a new dimension, I mis-measured a bit last time.
The Samsung AX40 should be 310mm x 282mm x 46mm.

I ordered 305mm x 280mm x 44mm.

 

[WussRedXLi]

bro for the AX40 customised, what size did you order? did you include the charcoal?

No, this is just the HEPA. I omitted the charcoal, as I can put the charcoal bags on top of the aircon fan coil unit , which is where the air-intake is.

I'd recommend a new dimension, I mis-measured a bit last time.
The Samsung AX40 should be 310mm x 282mm x 46mm.
But not an issue, just spend 2 minutes stuffing the gap with tissue paper, problem solved. In any case, to reduce bypass to a minimum, you have gotta use tissue paper anyway, even with say a Philips A40 with original Philips HEPA filter as that's far from airtight at the sides. (there is no gasket there)

I measured the airflow with this new filter, it's excellent. I got one piece to try out (RMB120), I will be getting 4 more pieces.

I'm intending to change out the filters between 6-9 months.

Quality is H12.
Aliwangwang him here :
http://item.taobao.com/item.htm?spm=a1z09.2.9.570.JTC4wn&id=20676620186&_u=h1u0hcibc415

 

[WussRedXLi]

Bought another 4pcs for the Samsung AX40 : new size 310mm x 282mm x 44mm.

Seller said 310mm x 282mm x 46mm is not possible. Coz dunno what is only possible for double layer HEPA net. The current quality/construction works for me, so i do not want to change the HEPA material itself.

Still is H12 grade.

Only RMB110 per piece for 1 bulk purchase of 4pcs. (was RMB120 per piece previously).

More expensive than the ready-made ones for A40 (RMB135 for 2 pieces, 32mm thick) but sinne it's custom and 44mm thick.

 

[WussRedXLi]

BTW, i put disclaimer first. I do not have a 0.3 micron laser particle counter to test and confirm the effectiveness and there is no haze now. Coz during haze period, you could shine a powerful flashlight/laser (flashaholic and laserholic here. ) and you can easily check if it's "working".

But if you have an ultra-critical use, eg your parents just had a heart bypass and there is a need for very very clean air 24 x 7, i'd not recommend you to solely rely on this solution.

But i think for pregnant ladies, infants, young kids....more than enough.

Currently for the month of Dec, we are averaging a daily 24-hr avg of 10 ug/m3 PM2.5 concentration.