Air purifier?

[uRiZEn]

Any recommendations for air purifier? Noticed some debunking the sharp ion purifier for producing ozone. First time buyer.

 

[bullfrog]

Forget ion air purifiers. For haze, you need purifiers with hepa filters

Sent from GAGT Android App

 

[WussRedXLi]

Forget ion air purifiers. For haze, you need purifiers with hepa filters

Sent from GAGT Android App

3M filterete sexpert lai liao. Where have you been the whole time man? Waiting for PSI 401 again?

 

[WussRedXLi]

Note. 1445h view towards Tg Pagar port visibly degraded. Not sure if 3pm 1-hr reading would reflect or not (I believe the monitoring station is @ Fort Canning).

But 4pm should show, if the denser haze sustains.

 

[tmkedmw]

Air Monitoring stations in Singapore

North
· Yishun (Yishun ITE)
· Sengkang (Pei Hwa Sec School)
· Kranji (Kranji Reservoir)

South
· Newton (Environment Bldg rooftop)

East
· Bedok (Temasek Polytechnic)
· East Coast (Tanjong Katong Girls’ School)
· Pasir Ris (Siglap Secondary School)

West
· Choa Chu Kang (Stagmont Camp)
· Jurong West (NTU)
· West Coast (Pandan Reservoir)

Central
· Bishan (Bishan ITE)

RoadsideStation Location
Clementi Along PIE Tuas
Outram Outram Road near Furama Riverfront
Hotel

 

[djkopikat]

(1) A decent PM2.5 monitor is not cheap. Mine is too cheap to give any accurate readings, hence I don't give any in this thread. I would not recommend you to spend $$ on this unless you just won Group 1.


(2) Yes, I am very used to getting stuff on TB/Tmall.
The item in the link has a H12 or HEPA-12 (ie 99.5% efficiency at 0.3 microns) filter, unfortunately it has unknown airflow spec.

That tmall link you just posted has a very very good vid, i'd just take the opportunity to type out the summary and share with the others here.

They tested 3 air purifiers in the car. Ambient air reading was 328 ug/m3, they "aired" the car cabin and closed the windows, and got a reading of 277 ug/m3. After a 20 mins drive and air purifier operation, they got readings below (42, 30 and 98 ug/m3)

There were 2 pax in the car and an air quality scientist mentioned that during the 20 min drive, those 2 pax in a small car cabin do affect the readings. True enough, 277 ug/m3 dropped to 124 ug/m3 after a 20 min drive.

So only 2 are effective enough.

Thx for info!

 

[chuanz]

I think 4 pm will deteriorate... can't see across the straits liao since 3+

 

[WussRedXLi]

4pm

3-hr moving average PSI = 132. (PM2.5)

1-hr average PM2.5 concentration = 100ug/m3, up from prev 88ug/m3 @ 3pm
1-hr AQI PM2.5 = AQI 174.

 

[WussRedXLi]

Air Monitoring stations in Singapore

South
· Newton (Environment Bldg rooftop)

RoadsideStation Location
Outram Outram Road near Furama Riverfront
Hotel

Oh I know this one. It's located at the greenery patch beside Furama hotel. Just before the bus stop.

 

[WussRedXLi]

I think 4 pm will deteriorate... can't see across the straits liao since 3+

Unlikely to deteriorate much. In fact, it may improve at times.

Pakanbaru can be used as a gauge. 5-6km.
Currently SG is 4.5km.

Pakanbaru, Indonesia Forecast | Weather Underground

But then JAmbi further south is jialuck. 2.3km

Jambi, Indonesia Forecast | Weather Underground

Wind SW, 210 degrees 5 knots / 9kph.

 

[tmkedmw]

I think 4 pm will deteriorate... can't see across the straits liao since 3+

There is an update from NEA website. Source of haze is from central sumatra. Outlook is moderate based on 24hr PSI

 

[chuanz]

There is an update from NEA website. Source of haze is from central sumatra. Outlook is moderate based on 24hr PSI

For the rest of today, the current hazy conditions are expected to persist, and the overall air quality is expected to be in the high end of the Moderate range.

Aiyoh this kind of advisory... I'm glad they at least publish the 1hr conc...

 

[WussRedXLi]

There is an update from NEA website. Source of haze is from central sumatra. Outlook is moderate based on 24hr PSI

F them....

But if the haze intensity sustains 24 hours, then they cannot hide nothing also.

4.40pm here South side is crazy. I go take some pics. Update soon.

 

[chuanz]

West side broke 100ug/m3 @ 116...

 

[WussRedXLi]

 

[TwMilkTeaTw]

siao liao lor

no air pufier at home siols
jin emoss

 

[WussRedXLi]

Quite bad when I was up there @ 50 sty.

5PM


3-hr moving average PSI = 136. (PM2.5)

1-hr average PM2.5 concentration = 116 ug/m3, up from prev 100ug/m3 @ 3pm
1-hr AQI PM2.5 = AQI 182.

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[Stoneman]

Last year is the worst ,psi at 300 plus

 

[bullfrog]

3M filterete sexpert lai liao. Where have you been the whole time man? Waiting for PSI 401 again?

Hahahaha..Lurking my friend, lurking. Nice to be remembered though
Unfortunately, there's no instrument with me this time round. It's on loan to one of our customers in Pekanbaru. So..I've been following your postings instead. Keep up the good work!

 

[WussRedXLi]

Hahahaha..Lurking my friend, lurking. Nice to be remembered though
Unfortunately, there's no instrument with me this time round. It's on loan to one of our customers in Pekanbaru. So..I've been following your postings instead. Keep up the good work!

Ok! But really no need to do spot readings with a laser particle counter (ug/m3 models, not the xxxxx particles meters) this time round, waste money also + nobody would believe non-accredited equipment.

NEA is releasing the 1-hr average PM2.5 concentrations since Apr 2014. Just use the online calculator.

Last year is the worst ,psi at 300 plus

Yeah, really smoke out last year.