Air purifier?

[WussRedXLi]

Seriously, if the wind starts to shift for whatever reason, I really don't know what will happen.

Right now still a lot of happy people walking at Orchard, in the streets etc. We are still lucky.

 

[blues7]

On the west, everyday by later afternoon, burnt smell very strong, need to close all windows

This is already very uncomfortable

And it will last the whole night until next day morning

In fact, burnt smell all day, just that stronger smell for 12 hours or so

And yes, aware that situation can get a lot worse

World's most expensive city

We can reuse waste water, can we create rain?

 

[Panerex]

bro, u getting this also???

i plan to pre order as OOS...

i have NAP 301.

Seems like this model no longer available in the market.

So what's the difference between NAP 301 vs 501?

 

[slurpy0099]

bought juz before cny, lelong nobody buy tat time at harvey norman~

Is this true hepa?

 

[WussRedXLi]

Is this true hepa?

Did a search. Apparently it's one of those HEPA type purifiers. Maybe can do 2.0 microns high-efficiency (check out Amazon, lots of them) but suspect 0.3 microns is not that good. More for pollen/dust.

https://sharp.com.sg/web/products/prodDetail.asp?ProdId=325

See FU-A28 (mosmos also have, I remember). That one is H10/E10, or "HEPA-10" if you will, 85% @ 0.3 microns MPPS/most penetrating particle size definitely close to 100% at PM2.5/2.5 microns.

 

[WussRedXLi]

HEPA class

retention (total)

retention (local)

E10 > 85% ---
E11 > 95% ---
E12 > 99.5% ---
H13 > 99.95% > 99.75%
H14 > 99.995% > 99.975%
U15 > 99.9995% > 99.9975%
U16 > 99.99995% > 99.99975%
U17 > 99.999995% > 99.9999%

HEPA filters, as defined by the DOE standard adopted by most American industries, remove at least 99.97% of airborne particles 0.3 micrometers (µm) in diameter. The filter's minimal resistance to airflow, or pressure drop, is usually specified around 300 Pa at its nominal flow rate.

The specification usually used in the European Union is the European Norm EN 1822:2009. It defines several classes of HEPA filters by their retention at the given most penetrating particle size (MPPS):



HEPA - Wikipedia, the free encyclopedia

So can take it that your N95 is E11, and N100/P100 masks are HEPA-13.

 

[nivek999]

Depends on the setting.

My plan is one unit per room so $199x4 is less then $800 so still reasonable. Right now the psi is still okay okay so will leave at low first. Worst psi case scenario is put all the units at full power into main hall and whole family sleep there.

so extreme meh?

 

[reds79]

i have NAP 301.

Seems like this model no longer available in the market.

So what's the difference between NAP 301 vs 501?

no idea....

current unit is from samsung.....

buying one more is for wifey who is pregnant and due in june

in case i need, like last year everywhere OOS....

 

[alamin2]

bought the taiyo air purifier during IT show. not bad.

ive a philips air purifier also.. and a bionaire.

dont get bionaire... super freaking noisy.....

 

[stocklah]

any location have stocks of blueair, honeywell air purifier?

 

[drift01]

Basically all OOS. Can call up Harvey Normal Centrepoint.... Monday lunchtime still have a couple (Hitachi, Technogas, Philips).

Thanks, will give it a try

 

[WussRedXLi]

Thanks, will give it a try

No prob, hope that helps!

If really OOS, just get the 3M Filtrete air con filter from HomeFix or NTUC. Then on the a/c nearly 24 by 7. If afraid of $$$ then set temp at 26 or even 27. Seriously, with a HEPA air purifier you are supposed to use it in an air con env.

The pm2.5 confirm will drop decently. PM10 no need to say, pretty effective. Tested here in EDMW by some bro with an air particle counter.

 

[procmail]

no idea....

current unit is from samsung.....

buying one more is for wifey who is pregnant and due in june

in case i need, like last year everywhere OOS....

Yeah bro, better get early.

 

[procmail]

HEPA class

retention (total)

retention (local)

E10 > 85% ---
E11 > 95% ---
E12 > 99.5% ---
H13 > 99.95% > 99.75%
H14 > 99.995% > 99.975%
U15 > 99.9995% > 99.9975%
U16 > 99.99995% > 99.99975%
U17 > 99.999995% > 99.9999%

HEPA filters, as defined by the DOE standard adopted by most American industries, remove at least 99.97% of airborne particles 0.3 micrometers (µm) in diameter. The filter's minimal resistance to airflow, or pressure drop, is usually specified around 300 Pa at its nominal flow rate.

The specification usually used in the European Union is the European Norm EN 1822:2009. It defines several classes of HEPA filters by their retention at the given most penetrating particle size (MPPS):



HEPA - Wikipedia, the free encyclopedia

So can take it that your N95 is E11, and N100/P100 masks are HEPA-13.

Interesting, thanks!

So those Sharp, Honeywell (HA170) are under which class?

 

[WussRedXLi]

Interesting, thanks!

So those Sharp, Honeywell (HA170) are under which class?

Sharp ranges leh.... the more ex models are HEPA-13. Stuff like A28 is E10. Then also got the recently mentioned Z30 as dust collection bag. But got a model that's Z31 that's E10.

Honeywell basically HEPA-13. But they also got desktop models (ie Amazon got quite a few) that are like N95s. 95% @ 0.3 microns.

http://www.amazon.com/Honeywell-Com...640140&sr=8-4&keywords=honeywell+air+purifier


There are also "dust collection bag type", ie 2 microns. They are effective for pollen and dust though, and yeah there are ok for hay fever/allergic rhinitis sufferers who would find such entry level model useful and very cost effective.

Eg http://www.amazon.com/Holmes-HAP242...394640230&sr=8-2&keywords=Holmes+air+purifier

ie for comparison's sake, a typical and cheap vacuum cleaner bag made of PAPER can do > 99% efficiency @ 3 microns. (note : HEPA is 0.3 microns)

Not everyone needs and have 3k budget for IQAir 250.

 

[procmail]

Sharp ranges leh.... the more ex models are HEPA-13. Stuff like A28 is E10. Then also got the recently mentioned Z30 as dust collection bag. But got a model that's Z31 that's E10.

Honeywell basically HEPA-13. But they also got desktop models (ie Amazon got quite a few) that are like N95s. 95% @ 0.3 microns.

Amazon.com - Honeywell Compact Air Purifier with Permanent HEPA Filter, HHT-011 -


There are also "dust collection bag type", ie 2 microns. They are effective for pollen and dust though, and yeah there are ok for hay fever/allergic rhinitis sufferers who would find such entry level model useful and very cost effective.

Eg Amazon.com - Holmes HAP242-UC HEPA Type Desktop Air Purifier - Hepa Filter Air Purifiers

ie for comparison's sake, a typical and cheap vacuum cleaner bag made of PAPER can do > 99% efficiency @ 3 microns. (note : HEPA is 0.3 microns)

Not everyone needs and have 3k budget for IQAir 250.

Thanks.

So I think my old Sharp FU-21SE-S is probably E10, and my Honeywell HA170 is probably HEPA-13.

EDIT: hmmmm the manual says FU-21SE-S is a True Hepa, whatever that means.

 

[Jin Satki Man]

How about OSIM air purifier ???

 

[mosmos]

at ntuc sextra~

 

[widman01]

at ntuc sextra~

NTUC Nex increase to $149 just now

income opportunity!!!

 

[mosmos]

tis foto ish at Jem ntuc in Jan 2014, not sure got stocks anot~