Yup.i read that
I have been using it more than 2 months now and quite satisfied with the result.

I bought it at rm290.anyone wanna know which shop pls pm me.thz

between, I will turn it on all night during my sleep. 
I set it to lowest and let it runs on its own till I wake up I will turn it off. lowest speed is silent.
you've got my pm. 

No timer to cut it off?

27w is more than 1 CFL light bulb running cost.

Beside that, when your room is already fill up with clean air, continue run doesn't have any advantage. Ain't it better this 27w extra be run on a light bulb ? 

The filter lifespan is definitely shorten which is also the most expensive part.

If you decide to get a timer, 1yrs you already pay back your timer. RM12 from your running cost saving and the rest is from your saving in prolong the life of the filter. 

Good idea also.

But I didn't do that. I have a small place. Too many unit is crowded the place.

I m lazy guy also. 1 more unit, more maintenance.

bro, since your living hall so big you can also consider FU-A80E
let's say two unit of FU-A28E-W cost you about RM650, FU-A80E cost rm 700-800 you can consider taking this which is just 100 more extra.
reason because FU-A80E has more applicable floor size than the FU-A28E-W.
Plasmacluster Air purifiers
FU-A80E
Coverage Area (Sq ft)
:  680

Plasmacluster Air purifiers
FU-A28E
Coverage area 19m

no la, I make an assumption only. 
depends how heavy u use it anyway, if you are hardworking type and you can always clean/vacuum the filter every 2 weeks.then it should last longer and most probably you only need to replace it every 2 years

Just sharing, I had recently bought a sharp FU-A28E-W purifier for RM299 at Aeon Big, Midvalley.

it does pay to compare prices. : )

Y dun u get a better quality and higher efficiency and with bigger coverage area and higher CADR rate air treatment system. So u can put in living hall when u wan to sleep juz put into ur sleeping room and turn it on to clean d air.

If u buying a cheaper 1 usually d d performance ll be lower n coverage area is small. Juz like a example ll u be buying 2 nokia hp instead of getting 1 iphone which really can perform?
Guideline for choosing air treatment system:
1. How many micron of particle can be filter
2. How many types of containminates can filter, any prove?
3. Wat is d CADR rate? Area coverage
4. How to filter d gas, smell?
5. How to detect d air quality?
6. Maintenance cost?
7. Noisy?
8. How much electricity bill charge?

Sorry to be giving some my opinion. Hope you dun mind. I actually thinking to place a layer more filter is quite extra work and double work. Unless the 3M filter that put can filter smaller particle than the air treatment system.

Better air purifier doesnt not really have other extra function. I m using Amway atmosphere. It does not add on extra function.

Juz based on d the answer:
Filter 0.09micron particles
CADR rate is 7.1m3/min. Does check carefully when u buy other brand. Many ppl confuse n miss read for unit sq ft / mins or hr.
Filter 80types of containminates include influenza A, SARS.
It doesnt not consist humidter as i think this is smth extra. When u purchase air treatment system. Key point is filter haze, containminates, virus n provide clean air for u.
No need a big maintenance once a while 2-3years
It have sensor detect air quality. It wont noisy very silent so wont disturb my sleeping time.
D HEPA filter is 8.5meter long. Surface area of carbon filter is equal to 300++  football field

When i work as chemist we ll refer the products of data sheet.
So i m refer to data that manufacturer giving lo.
For HEPA filter it is truth. I saw it before when they take out d filter

https://www.facebook.com/super8airpurifier

May you guy can take a look at this SUPER 8 AIR PURIFIER, CHEAP AND VALUABLE

Hi, anyone had use Philips Air Purifier 800 series AC0820/30, appreciate your views. 

I'd like to know if it's effective to purify an area of 49m2 as it boasts. And would like to know whether the recommend filter change of every 12 months is practical as the usage may differ from one person to another...

I intend to put in a smoking room 200-250sf. Switch on 24 hours, auto mode. You changed every 6 months as the indicator prompts you for change or is it just a regular change you practice?