Air purifier?

[WussRedXLi]

Hi wuss.. Im going to buy a secondhand novita nap 101I at 49 worth it anot..

It's workable. Just make sure motor not much sound.

HEPA can change later. Shd not be difficult to source since you TB queen.

 

[WussRedXLi]

samsung/sharp also don't need to change every month. and not noisy.
clair is not bad. a lot of Koreans frens using them

NE parts of China, usually they change ard 3 months. And this thing is about H11 grade nia, as they tested it.

But if you put your nose at the outlet and start smelling a wee bit of "organic" smell (and not the fresh smell when it's brand new), that's probably some mold or bacteria colony, something like that. Better to change it out. It's difficult to say, coz the room might be more damp than others, I would not know.

Some folks may even have a humidifier. (serious rhinitis/sinusitis sufferers, but die die must have air con due to the heat)

 

[WussRedXLi]

Particle counting (Smart Air Filter) site again...
Particle Counting



Does Carbon Really Work?

I wrote early on that my number one concern in China is particulate pollution. It’s on so many people’s minds that nowadays even the guy I buy chuan’r from knows the word “PM 2.5.”

HEPAs do an amazing job at removing particulates, but particulates aren’t everything. Gases like volatile organic compounds (VOCs) are so small that they slip through HEPAs. “VOC” is a big category, including things like benzene and formaldehyde. VOCs can cause cancer, throat irritation, dizziness, and other not-fun side effects.

And for homes that have VOCs problems, we’re supposed to use activated carbon filters. But do they actually work?

When I published the instructions for how to build your own purifier, I wasn’t comfortable recommending activated carbon because I hadn’t tested it, and I didn’t want to just trust what the big filter companies say. So this year, I set out on a journey to test whether carbon actually works.

Method

I soon learned that gas testing is not easy. First off, “harmful gases” is not a natural category. You can buy a particle counter that will detect all particles of a certain size, but there is no detector that will detect all gases. Instead, you need one for each type of gas, and that is not cheap.

In this case, my scientific curiosity cost me $3,542 for this Industrial Scientific Ibrid MX6. It detects VOCs, carbon monoxide, sulfur dioxide, hydrogen sulfide, and nitrogen dioxide. It uses a photo-ionization detector to measure VOCs from 0-2,000 parts per million with a resolution of .1.

image

Next, I needed a source of gas pollution. Interestingly enough, my apartment didn’t have enough VOCs to register on the MX6—nor did 8 other Beijing apartments I tested. (That speaks to whether purifier companies should scare people into thinking that everyone needs carbon.)

Because I didn’t have detectable VOCs in my home, I had to go out and find VOCs to pump into my room. I chose cigarettes because they are known to emit VOCs like benzene and formaldehyde.

In each test, I burned 3 Marlboro cigarettes in an enclosed 3.78 m2 porch. At the same time, I ran the Cannon on high for five tests with a composite carbon filter on the front:

I ran four control tests with a fan but no filter. That way the room still has air flow, but no carbon. The cigarettes burned out after about 15 minutes, and I left the fans on for another 30 minutes.

Results

The carbon clearly lowered the amount of VOCs in the air. With the carbon, the VOCs reached a maximum of about .9 ppm. Without the carbon, VOCs reached 1.5 ppm.

After the cigarette burned out, the Cannon cleared the air of VOCs in about 20 minutes. Without carbon, the air still had VOCs after 30 minutes.

Averaging over all of the tests, the carbon removed 38% of VOCs by the time the cigarettes burned out, 68% after another 5 minutes, and 100% by 20 minutes after the cigarettes burned out.

Conclusion

The results showed that carbon effectively removed VOCs. Thus, I’ve decided to start shipping these tested carbon filters via Taobao and PayPal for 70 RMB.

Does everyone need carbon?

Purifier companies have a financial incentive to convince people to buy carbon filters. They make more money if they can scare people into buying carbon.

Although the data shows that carbon is effective, I don’t want to scare people into buying carbon. Why? I never detected VOCs in any homes that did not have an obvious source of pollution such as remodeling or smoke. And in all of the places where the MX6 detected VOCs, I was able to notice a chemical smell. That makes sense, since lots of VOCs have noticeable smells, like benzene, toluene, and formaldehyde.

Now, I don’t want to say that VOCs are never a problem. The MX6 is not the most sensitive detector out there, and the results may be different if I were to use a different testing method. However, scientists in Hong Kong tested homes and found that most non-smoking homes did not have un-safe levels of VOCs. We need more tests like this.

For now, I will not be using carbon in my home, but I think it is right for people whose homes have:

1. Recent remodeling

2. Recent painting

3. Smoking

4. Odors

5. Nearby sources of gas pollutants (such as living near a factory)

6. Symptoms such as inflammation and asthma

 

[WussRedXLi]

Hi Bro WussRedXLi,

You have any recommendation for HEPA or True HEPA filter for Sharp KC-930E from Taobao?
Currently it is using a all-in-one filter that does not meet HEPA standard.
I did a measurement and the dimension is about 378mm x 236-237mm x 31-32mm.

Thanks in advance.

Then it's the same size as the A40 and KC-840.


Chinese equivalent is FZ-200HFS. Note, this guy is using F9 media.
ÊÊÓÃÓÚÏÄÆÕ¿ÕÆø¾»»¯HEPA¼¯³ÉÂËÍøFZ-200HFSÊÊKC-Z200SW/W200SWµÈ-ÌÔ±¦Íø

尺寸：370*233*30

That 8mm gap may pose a wee bit of issue but can be solved with tissue paper. But that's for this seller only....coz all are "DIY" OEM hence it's not exactly very exact in dimensions sometimes.
The other seller that I am recommending is using H12 media, I have it and it's 32mm depth and the size is the same as my original Sharp (I have one last piece in my storeroom).
H12, by strict definition, is still not HEPA (High Efficiency Particulate Arrest). It's just EPA. But it's 99.5% thereabouts, and it'd work excellent for home use.

Link here to that seller (H12 media) is here :
ÏÄÆÕ¾»»¯»ú¼¯³¾¹ýÂËÍø¶¨×ö(ÊʺÏKc-W380Sw/FZ-200HFS/FZ-280HFS)-ÌÔ±¦Íø

It costs RMB71.28. 200机型白色hepa网

Anyway, all these taobao guys have small setups that manufacture coarse pre filters, medium efficiency filters (ie used in commercial buildings HVAC AHUs or prefilter for cleanroom or pharmaceuticals HEPA/ULPAs), High efficiency filters. So i'd trust them. It's just how you spec them up, the last thing to do is to plug up the sides to prevent bypass.

The media integrity looks good, no holes no compromises. Don't really need those DOP integrity tests for home use.


Sharp HEPA filters used to be made in japan. But nowadays after the KC8xx series (from KC-A40/50 onwards, inclusive), all are Made in China already.

 

[WussRedXLi]

Original

http://detail.tmall.com/item.htm?sp...&cm_id=140105335569ed55e27b&pm_id=&abbucket=6

 

[chompchomp]

It's workable. Just make sure motor not much sound.

HEPA can change later. Shd not be difficult to source since you TB queen.

Thankyou i will most likely get it tomorrow.. u taobao king lah.. my chi bu ke yi

I tried searching to no avail

Need ur shifu skills to source riao

 

[NWT1978]

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.

wah u go TB order the filter somemore 4 pcs each... except for Samsung ones

 

[lingcw]

Hi WussRedXLi,

Thanks for your advise. I will probably go with your recommendation and get from the H12 seller. Buy 1 and try first... if ok, then buy more.

Merry Christmas!

Then it's the same size as the A40 and KC-840.


Chinese equivalent is FZ-200HFS. Note, this guy is using F9 media.
ÊÊÓÃÓÚÏÄÆÕ¿ÕÆø¾»»¯HEPA¼¯³ÉÂËÍøFZ-200HFSÊÊKC-Z200SW/W200SWµÈ-ÌÔ±¦Íø

尺寸：370*233*30

That 8mm gap may pose a wee bit of issue but can be solved with tissue paper. But that's for this seller only....coz all are "DIY" OEM hence it's not exactly very exact in dimensions sometimes.
The other seller that I am recommending is using H12 media, I have it and it's 32mm depth and the size is the same as my original Sharp (I have one last piece in my storeroom).
H12, by strict definition, is still not HEPA (High Efficiency Particulate Arrest). It's just EPA. But it's 99.5% thereabouts, and it'd work excellent for home use.

Link here to that seller (H12 media) is here :
ÏÄÆÕ¾»»¯»ú¼¯³¾¹ýÂËÍø¶¨×ö(ÊʺÏKc-W380Sw/FZ-200HFS/FZ-280HFS)-ÌÔ±¦Íø

It costs RMB71.28. 200机型白色hepa网

Anyway, all these taobao guys have small setups that manufacture coarse pre filters, medium efficiency filters (ie used in commercial buildings HVAC AHUs or prefilter for cleanroom or pharmaceuticals HEPA/ULPAs), High efficiency filters. So i'd trust them. It's just how you spec them up, the last thing to do is to plug up the sides to prevent bypass.

The media integrity looks good, no holes no compromises. Don't really need those DOP integrity tests for home use.


Sharp HEPA filters used to be made in japan. But nowadays after the KC8xx series (from KC-A40/50 onwards, inclusive), all are Made in China already.

 

[Asakura]

NE parts of China, usually they change ard 3 months. And this thing is about H11 grade nia, as they tested it.

But if you put your nose at the outlet and start smelling a wee bit of "organic" smell (and not the fresh smell when it's brand new), that's probably some mold or bacteria colony, something like that. Better to change it out. It's difficult to say, coz the room might be more damp than others, I would not know.

Some folks may even have a humidifier. (serious rhinitis/sinusitis sufferers, but die die must have air con due to the heat)

my fren change about 2mths in China.
yea i am a sinusitis sufferer lol..had a inflam few years ago..

 

[WussRedXLi]

Thankyou i will most likely get it tomorrow.. u taobao king lah.. my chi bu ke yi

I tried searching to no avail

Need ur shifu skills to source riao

Just buy it and give me the dimensions. I have seen the nap101 before, the filter size is nothing too different compare to whats currently available (customisation bumps up the price a wee bit).

 

[WussRedXLi]

wah u go TB order the filter somemore 4 pcs each... except for Samsung ones

The other 3 x A40/kc840 filters are for my in-laws.

My kc840...i still have to use up 1 piece of Sharp original A40 H13 and also the Honeywell Type H H13 filters that i bought from Amazon. Honeywell type H H13 1-time change is about usd24. And i just changed my kc840 filters a month ago after the haze.

In future...i intend to change in cycles of 6 -9 mths, with TB as the cheapest source.

 

[WussRedXLi]

Hi WussRedXLi,

Thanks for your advise. I will probably go with your recommendation and get from the H12 seller. Buy 1 and try first... if ok, then buy more.

Merry Christmas!

Yep...buy 1 first to try. Remember to tag on with other purchases on TB else waste the forwarding shipping fees.

 

[tingsters]

Hi WussRedXLi,

can help me to find a link in tb for Sharp Fu a28e filter, cos i got other things to buy in tb, then one shot to buy some to save shipping fee.

Cos i tried to find quite hard to locate this filter.

Thanks

 

[d3athadd3r]

i just bought IQair. huat ar

 

[Asakura]

i just bought IQair. huat ar

share leh. buy from which distributor?

 

[d3athadd3r]

supratechnic..good price now got xmas promo

 

[WussRedXLi]

i just bought IQair. huat ar

You got a medical condition?

 

[WussRedXLi]

Hi WussRedXLi,

can help me to find a link in tb for Sharp Fu a28e filter, cos i got other things to buy in tb, then one shot to buy some to save shipping fee.

Cos i tried to find quite hard to locate this filter.

Thanks

Ok, searchig now. It's a 25mm depth filter, so is easy.

Edit - looks like not so easy. What you need is a 305mm x 285mm x 25mm filter. Pls confirm by measuring it yourself, the figure is from my memory.

The seller using H12 filter media does not have such a size or close to it.
The closest is Philips AC40xx series but they manufacture in 45mm depth so it won't fit.

AC4147/AC4199


This guy is using F9 media.
·ÉÀûÆÖ4074/4072/4083 Smartair HEPA¹ýÂËÍø DIY¿ÕÆø¾»»¯Æ÷ÂËÍø-ÌÔ±¦Íø


I think the closet bet is asking how much they will charge for 2 pieces of customisation. 2PC of A28 size + packing would probably be in the 1.5kg range.

 

[tingsters]

Hi WussRedXLi, yes the dimension is correct, i also very hard to find...

 

[WussRedXLi]

Hi WussRedXLi, yes the dimension is correct, i also very hard to find...

I can find...just need to cut it to size and/or use tissue paper to stuff to reduce the bypass. But those sellers the filter quality is lower. Eg i alww the other guy and he is honest enough to tell me its F9.

The seller i quoted for customisation is using H12 media.

Dont worry about H12 or H13 "true hepa"....in consumer based devices and HDB condo rooms, makes no difference.