Air purifier?

Status
Not open for further replies.

aerosmiths

Arch-Supremacy Member
Joined
Oct 2, 2008
Messages
11,093
Reaction score
2
i chanced upon this ecobox and fresh air product from ecoliving and they don't use passive filters but rather release active ions into the air to purify it. does this have the same effectiveness as HEPA when dealing with haze? the salesperson on the phone assures me that it will remove the harmful PM2.5 portions of haze. anyone test before?

another one i got quoted was Airion SA9500, claims to have 10 stage filter including hepa, only thing i don't know if it is true hepa and if it creates ozone.
 
Last edited:

chuanz

Supremacy Member
Joined
Nov 18, 2007
Messages
5,005
Reaction score
11
Here frequently mentioned are more mainstream brands like Sharp, Samsung, Honeywell, etc... not sure about the ones you mention...

EcoBox utilizes needlepoint ionisation, pulsating positive and negative ionisation, corona discharge air freshener in Away Mode and the patent pending ActivePure technology - consisting of a special UV light and photocataylst target - thereby creating an Advanced Oxidation Plasma containing several friendly oxidisers.

Other than the incoherently long sentence that does not make much sense, corona discharge means confirm ozone as side product... and wtf are friendly oxidisers... :s22: anyway, from the very limited information on the website, sounds like just an electrostatic air filter + ionizer.

limited info + unknown brand = not getting my dollars (but that's just me).
 

eXceSsivE

Senior Member
Joined
Apr 2, 2010
Messages
1,414
Reaction score
105
Dear Sir,

I have a Sharp FU-A28E which I bought it currently. May I know for this air filter, must it be used in the room with aircon being switched on or I can just simply use it with my windows door open or my door open?
 

chuanz

Supremacy Member
Joined
Nov 18, 2007
Messages
5,005
Reaction score
11
Dear Sir,

I have a Sharp FU-A28E which I bought it currently. May I know for this air filter, must it be used in the room with aircon being switched on or I can just simply use it with my windows door open or my door open?

Running ANY brand/model air purifier with open windows/door is like trying to fill up a colander...

Ok, think of it this way, air purifiers are designed to cover a certain volume of air (by metric of air change/hr). When you open the door, you are adding the volume of the other "room" into your room (from the air purifier perspective), and when you open windows... hoseh liao...
 

mosmos

High Honorary Member
Joined
Feb 25, 2001
Messages
174,998
Reaction score
8,332
10531459_730679477002422_8866436803773207628_o.jpg
 

chuanz

Supremacy Member
Joined
Nov 18, 2007
Messages
5,005
Reaction score
11
Wow... good price! I think this haze no show caused lots of retailers to over stock... can foresee more cheap sales coming up if weather continue...
 

WussRedXLi

Greater Supremacy Member
Joined
Jun 15, 2001
Messages
94,818
Reaction score
11,437
Dear Sir,

I have a Sharp FU-A28E which I bought it currently. May I know for this air filter, must it be used in the room with aircon being switched on or I can just simply use it with my windows door open or my door open?

Running ANY brand/model air purifier with open windows/door is like trying to fill up a colander...

Ok, think of it this way, air purifiers are designed to cover a certain volume of air (by metric of air change/hr). When you open the door, you are adding the volume of the other "room" into your room (from the air purifier perspective), and when you open windows... hoseh liao...

Actually I did mention similarly in my replies too, ie it's like trying to operate an aircon with the windows/doors opened.

But come to think of it, it's not that bad if you close the windows and leave the door open, or vice versa.

For airconditioning, there would be quite a fair bit of "air exchange" between the room and "outside" due to temperature difference, ie with the door open, there would be a cold breeze leaving the room at the bottom part of the door and a warm breeze coming into the room at the top part of the door.

But I guess for air purifiers, there is still a decent cleaning effect if the door is opened and the window is closed. But NOT if both door + window is opened.

This is because air purifiers do not provide cooling/heating leading to temperature differences between "outside" and "inside".

If one over-specs the air purifier, I think non-issue ba.
 

WussRedXLi

Greater Supremacy Member
Joined
Jun 15, 2001
Messages
94,818
Reaction score
11,437
Wah lao, display set air purifiers could be very much molested at the store leh. Really need to check the HEPA filter properly and see if it's even slightly greyish.

If it's 50% off then can disregard. :D But fat hope ba.
 

WussRedXLi

Greater Supremacy Member
Joined
Jun 15, 2001
Messages
94,818
Reaction score
11,437
With central a/c (HVACs - Heating Ventilation and Air Conditioning, AHUs - Air Handling Units), the tendency is that the filters could be poorly maintained. ie you get bigger sized particulates. You'd be able to filter haze/smoke particles pretty ok as they are introduced externally due to ventilation requirements (it's never even remotely close to airtight, will die :D). However, with poorly maintained coarse and moderately coarse air filters in the AHU and HVAC systems would tend to choke up the small HEPA filters in your portable air purifiers.

But this does not mean that high performance/high MERV rated filters and HEPA filters do not exist in commercial spaces. An exaggerated example would be hospitals.
An even more exaggerated example would be cleanrooms.

SGH Haemotology specialist clinic and Mount Elizabeth's High Dependency Unit.

156881017.wIhvdGdX.2.jpg


156364817.SOxRvOXe.20140630_130030.jpg
 

eXceSsivE

Senior Member
Joined
Apr 2, 2010
Messages
1,414
Reaction score
105
I have been switching on my air purifier 24/7 non-stop, electric bill, $350/month plus and more.
 

chuanz

Supremacy Member
Joined
Nov 18, 2007
Messages
5,005
Reaction score
11
I have been switching on my air purifier 24/7 non-stop, electric bill, $350/month plus and more.

Usual suspect would be aircon, oven, dryer, etc and not air purifier... either that or maybe faulty meter...


Q: How do I check if my electricity meter is faulty?

A: Switch off all the electricity switches within the premises, turn off the MCB and check if the electricity meter is still moving after 5 to 10 mins. If there are any doubts or issues which you require any clarification, please contact our customer service officer for further assistance.

sauce
 

WussRedXLi

Greater Supremacy Member
Joined
Jun 15, 2001
Messages
94,818
Reaction score
11,437
It'll keep raining for the first half of September, Met Service says - Channel NewsAsia

Expect wet weather to keep up, but there's still the possibility of haze thereafter, Meterological Service Singapore warns.




SINGAPORE: Following a prolonged dry spell earlier this year, more rain than usual pelted down on Singapore last month, in the middle of what is supposed to be the dry season.

And the relatively wet conditions are set to continue over the first half of this month before drier conditions set in, said the Meteorological Service Singapore (MSS) in response to queries.

The dry season typically runs from June to October. Last month, however, saw 240.2mm of rainfall, higher than the average rainfall of 175mm for the month. Last year and in 2012, the total monthly rainfall recorded for August were 179.8mm and 119.4mm, respectively.

The wetter conditions in July and August are due to the slightly higher occurrence of convective thunderstorms and the Sumatra squalls, a MSS spokesperson said.

On Wednesday (Sep 3), the PUB reported flash floods at the junction of Lower Delta Road and Telok Blangah Rise following heavy rain in the afternoon. In July, a heavy downpour accompanied by strong winds that lasted more than two hours left behind a trail of fallen tree branches. Flash floods were also reported on some roads, such as Mackenzie Road.

The MSS added that since the onset of the South-west Monsoon season in June, the region has been generally wet with brief periods of drier weather. While the occasional dry periods had led to an escalation of hot-spot activities in Sumatra and Kalimantan, Singapore has not been affected by the transboundary haze as the prevailing southerly winds have kept the haze away.

But it said for the rest of the South-west Monsoon season — which lasts until next month — periods of dry weather leading to increased hot-spot activities may still be expected in the region. “Singapore could be affected by transboundary haze if the prevailing winds blow any smoke haze in the region towards Singapore,” added the spokesperson.

The National Environment Agency (NEA) had predicted in June that weak-to-moderate El Nino conditions could develop over the next few months. In the latest El Nino update dated Aug 8, the NEA noted that while Singapore would usually experience drier and warmer conditions during El Nino events — especially during the South-west Monsoon period — the impact on rainfall and temperature is not uniform over time.

For instance, there were years where “relatively weaker events” induced more significant changes in rainfall, added the NEA.

-TODAY/es
 

WussRedXLi

Greater Supremacy Member
Joined
Jun 15, 2001
Messages
94,818
Reaction score
11,437
Slight haze in Singapore as number of hotspots in Sumatra soars - Channel NewsAsia



SINGAPORE: The number of hotspots detected on Indonesia's Sumatra island soared to 177 on Thursday (Sep 4), up from 80 the day before, the National Environment Agency (NEA) said in an advisory posted on its website. Most of these hotspots were in southern Sumatra.

NEA said there was slight haziness in the morning in Singapore due to accumulation of dust particles in the air under light wind conditions. As of 6pm, the 24-hour PSI is 66-74, in the Moderate range.

NEA said the slight haziness would likely continue on Friday, with light winds from the south forecast. Air quality is expected to be in the Moderate range. However, thundery showers are forecast for the late morning and early afternoon.

- CNA/ly
 

WussRedXLi

Greater Supremacy Member
Joined
Jun 15, 2001
Messages
94,818
Reaction score
11,437
Air quality here hits higher end of moderate band, AsiaOne News

SINGAPORE - Slightly hazy conditions could be observed all around Singapore as air quality hovered in the higher end of the "moderate" range. The Pollutant Standards Index (PSI) three-hour reading stood at 76 as of 4pm today. The number is down from a high of 84 at 10am today. The 4pm 24-hour PSI stood at 65 to 72. A number between 51 to 100 means air quality here is within the "moderate" range. A range of 101 to 200 indicates air is of unhealthy levels and anything beyond 300 very unhealthy. The National Environment Agency (NEA) said that a total of 80 hotspots were detected in Sumatra yesterday, mostly in southern Sumatra. Slight smoke haze was visible in the vicinity of some of the hotspots. As the prevailing winds are forecast to blow from the southeast, the overall air quality for today is expected to be in the Moderate range, NEA said in a media release yesterday. The health impact of haze is dependent on one's health status, the PSI level, and the length and intensity of outdoor activity. NEA said that while Singaporeans are advised to continue with normal activities, reducing outdoor activities and physical exertion can help limit the ill effects from haze exposure. The agency advised those who feel unwell - especially the elderly and children, and those with chronic heart or lung conditions - to seek medical attention.

20140904_hazesg_st.jpg
 
Status
Not open for further replies.
Important Forum Advisory Note
This forum is moderated by volunteer moderators who will react only to members' feedback on posts. Moderators are not employees or representatives of HWZ Forums. Forum members and moderators are responsible for their own posts. Please refer to our Community Guidelines and Standards and Terms and Conditions for more information.
Top