Air purifier?

[Niaoson]

Replacement filter can get from them. Or customise the size from TB.
This one has too low an airflow. It's just nice in high speed for small BTO bedroom (5 ACH) but it'd be too noisy. It is small though. But if you want it to be small, go for the Sharp A28.

If you wanna get that, you might as well get this one. It's reviewed in the Chinese youtube video that I posted 1-3 pages earlier. 319 m3/hr measured.

Brand new in box
$120 - http://www.gumtree.sg/a-miscellaneo...or-120-usual-at-199/1001404078170910721075309

Sealed
$99 - http://www.gumtree.sg/a-other-healt...ier-kj30fenv-sealed/1001382187030910673161709

For the Midea/美的, the HEPA and AC filters are available on TB directly. Or you can customise.

Thanks for the advice!

The Midea CADR seems to be very low (among the rest in the table). Will this be a problem?

 

[WussRedXLi]

Thanks for the advice!

The Midea CADR seems to be very low (among the rest in the table). Will this be a problem?

The others are all top grade stuff. Not a problem.

That kind of CADR can support a 22 m2 room, ie 5.5m x 4m, in high fan speed. 5 air changes per hour

 

[Niaoson]

The others are all top grade stuff. Not a problem.

That kind of CADR can support a 22 m2 room, ie 5.5m x 4m

Any idea about the electricity consumption versus the Samsung AX40?

Thinking of getting another AP for another room, just not sure which one to get since the AX40 is quite a lot more expensive than the Midea one..

 

[WussRedXLi]

Any idea about the electricity consumption versus the Samsung AX40?

Thinking of getting another AP for another room, just not sure which one to get since the AX40 is quite a lot more expensive than the Midea one..

Its 57W, so its a fair bit higher for the same airflow. It is also noisy in high fan speed, believe its 55dB or something.

But then it will be good enough for bedrooms which wont need high fan speed, just another suggestion. Medium shd be enough airflow and not noisy.

Just a matter on how much one is willing to spend and put up with regards to power and noise levels etc.

That $89 on qoo10 that you quoted confirm will be loud also.

 

[WussRedXLi]

BTW, just a note, you all can disregard the recommended area spec of the APs. Including big brands from Sharp/Samsung/LG etc.

Just use the airflow spec and divide by 5. This gives you 5 Air Changes Per Hr.
You can opt to use the max airflow spec. Eg 323 m3/hr div 5 div 2.9m ceiling height = 22 sqm. If you want, you can add 20% for your cabinets/bed etc....optional.
Personally, I'd give it some buffer.

If you want to opt for very high levels of filtration, opt for 5 ACHs in medium speed.

Of coz, the Samsung AX40 only has max fan speed mode. No medium or low fan speed. The sleep and auto modes maciam like not much use at all.

But take the Sharp A80 for eg, medium fan speed is 300 m3/hr @ 41dBA.
300 / 5 / 2.9 = 20.7 m2. Don't factor in the furniturs/cabinets etc. Use the A80 in a masterbedroom measuring 5 x 4m, will be great!

 

[WussRedXLi]

http://list.qoo10.sg/item/2015-AIR-PURIFIER-SINGAPORE-BRAND/428257530

Anyone tried this? Reviews?

Replacement filter available from Taobao?

Page 3 of customer review section stated that it's 170 m3/hr. Not too bad, but no SPL spec or power consumption spec.
33 cm length , 41 cm height , 16 cm


The Sharp A28 is 168 m3/hr, but stock is H10 or 85% efficient. Of coz, for most of us that's not an issue.
385 x 380 x 128 mm

 

[WussRedXLi]

Qoo10 AX40 sold by Daiso, now got Time Sale and seems to can apply Shop coupon (one time use $5). $258 shipped.

Item Price(1)S$248.00
Shop/Cart Coupon(1) Use My Coupons-S$5.00
Shipping rate see detailS$15.00
S$258.00

Was measuring the windspeed at the outlet of the AX40 (33cm x 10cm).
323m3/hr is really legit. Just needs 9.8 kph at the outlet, averaged.

The outlet has very little blockage by plastic bits, a bit less than the LG PS-R459.

 

[WussRedXLi]

First time seeing a Samsung AP on sale on carousell. $200, unfortunately it's probably the small AX022. (check out the number of outlet vanes)

https://carousell.com/p/27296448/


Might as well top up $58 for the a brand new big AX40.

 

[chercm]

so which purifier is worth while to get for the living room ? is it the Sharp A80 ?

 

[WussRedXLi]

so which purifier is worth while to get for the living room ? is it the Sharp A80 ?

Yes, if you only want one AP. It's $475-494 though. $494 at Vivo BEST.

Choose yourself.
A80. 480m3/hr@75W@53dB (pretty noisy, so can't operate for long periods)
300 m3/hr@25W@41dB (very quiet for the airflow)
$475-494, local retail.

Samsung AX40. 323 m3/hr @ 28W measured @ 45dB. Decent for sleeping.
Now only $258 shipped.

So seriously there isn't much of a difference. Just that the Sharp A80 has a "turbo mode" in which you can pump out 480m3/hr or 48% more airflow for shorter periods like say 15-30 mins.

Both have original filters available for sale.

Or get 2 x Samsung AX40 for $516 and rule the world! (remember to separate the orders coz $400 is the limit for GST payment). Now, if you tag an additional HEPA filter to each order, it's only $78.

Each original Sharp H13 filter is $109.

Sharp A80 + 2 HEPA = $494 + 109 + 109 = $712. 480 m3/hr. You can support a 33 m2 living room with 5 ACH @ 53dB.
AX40 + AX40 + 2 HEPA = 258 + 78 + 258 + 78 = 672 shipped.
You'd get 646 m3/hr. You can support a 44 m2 living room with 5 air changes per hour @ 45dB + 3dB = 48dB


2 units also give you more placement flexibility, various rooms etc.

 

[WussRedXLi]

I'll teach you guys how to save more with the AX40.

Every year, the haze months run for about 4 months. You can use 1 x original HEPA for 8 months hazy periods, so that's 2 years lifespan per original HEPA filter.

Non hazy period of 8 months, you can use this Taobao filter. Don't have to customise (so no need to type in Chinese to converse with the seller), just trim the part that runs along the pleat. Then the top part can just roll up the plastic packaging and plug the gap. It would work, trust me, I have measured.

Same, 4 months for the filter. So 1 year use 2pc.
RMB 29.90 per piece. Just buy 6 or 8 in 1 shot ba.

This would drop the airflow by about 35% max (it's more like 30% actually, actual measurement with my anemometer). So it becomes 210 m3/hr. It would also be slightly more silent, and suck less electricity due to slower motor rotation with the added resistance (as measured current draw with a multimeter). 210m3/hr is good for 14.5m2 room with 5 ACH, shd be just nice for MBR during non hazy months.


http://world.taobao.com/item/412171...&spm=a312a.7700824.w4004-8871129750.35.4ePHOj

 

[chercm]

Yes, if you only want one AP. It's $475-494 though. $494 at Vivo BEST.

Choose yourself.
A80. 480m3/hr@75W@53dB (pretty noisy, so can't operate for long periods)
300 m3/hr@25W@41dB (very quiet for the airflow)
$475-494, local retail.

Samsung AX40. 323 m3/hr @ 28W measured @ 45dB. Decent for sleeping.
Now only $258 shipped.

So seriously there isn't much of a difference. Just that the Sharp A80 has a "turbo mode" in which you can pump out 480m3/hr or 48% more airflow for shorter periods like say 15-30 mins.

Both have original filters available for sale.

Or get 2 x Samsung AX40 for $516 and rule the world! (remember to separate the orders coz $400 is the limit for GST payment). Now, if you tag an additional HEPA filter to each order, it's only $78.

Each original Sharp H13 filter is $109.

Sharp A80 + 2 HEPA = $494 + 109 + 109 = $712. 480 m3/hr. You can support a 33 m2 living room with 5 ACH @ 53dB.
AX40 + AX40 + 2 HEPA = 258 + 78 + 258 + 78 = 672 shipped.
You'd get 646 m3/hr. You can support a 44 m2 living room with 5 air changes per hour @ 45dB + 3dB = 48dB


2 units also give you more placement flexibility, various rooms etc.

which Qoo10 seller ?

are you referring to this model :AX40H5000GMD ?

 

[WussRedXLi]

which Qoo10 seller ?

are you referring to this model :AX40H5000GMD ?

Yes. Seller is Daiso.

chuanz wrote:

Qoo10 AX40 sold by Daiso, now got Time Sale and seems to can apply Shop coupon (one time use $5). $258 shipped.

Item Price(1)S$248.00
Shop/Cart Coupon(1) Use My Coupons-S$5.00
Shipping rate see detailS$15.00
S$258.00


Singapore retail is $479

 

[chercm]

Yes. Seller is Daiso.

chuanz wrote:

Qoo10 AX40 sold by Daiso, now got Time Sale and seems to can apply Shop coupon (one time use $5). $258 shipped.

Item Price(1)S$248.00
Shop/Cart Coupon(1) Use My Coupons-S$5.00
Shipping rate see detailS$15.00
S$258.00


Singapore retail is $479

cannot seems to use any coupons on this one

 

[chuanz]

cannot seems to use any coupons on this one

Use the shop coupon. Not cart or item coupon.

Anyway if cannot also nvm. I just paid for one $279 shipped exactly one week ago. No promo then, but still worth it. It's my third AX40

 

[kasco]

Hi WussRedXLi,

Being following this thread recently and appreciated your active feedbacks on this subject. Am planning to go with the AX40 and am interested to know more of your money saving methods.

Based on my understanding of your message, you will swap out the original filter after haze period and replace it with the Taobao one during non hazy period? What about the deodorisation filter? Do u reuse the original one or use without deodorisation filter? Cos not sure if the original filter is a 2 in 1 i.e. HEPA and Deodorisation Filter together as one?

Thanks in advance!

I'll teach you guys how to save more with the AX40.

Every year, the haze months run for about 4 months. You can use 1 x original HEPA for 8 months hazy periods, so that's 2 years lifespan per original HEPA filter.

Non hazy period of 8 months, you can use this Taobao filter. Don't have to customise (so no need to type in Chinese to converse with the seller), just trim the part that runs along the pleat. Then the top part can just roll up the plastic packaging and plug the gap. It would work, trust me, I have measured.

Same, 4 months for the filter. So 1 year use 2pc.
RMB 29.90 per piece. Just buy 6 or 8 in 1 shot ba.

This would drop the airflow by about 35% max (it's more like 30% actually, actual measurement with my anemometer). So it becomes 210 m3/hr. It would also be slightly more silent, and suck less electricity due to slower motor rotation with the added resistance (as measured current draw with a multimeter). 210m3/hr is good for 14.5m2 room with 5 ACH, shd be just nice for MBR during non hazy months.

 

[WussRedXLi]

Kasco, if you are using the Taobao HEPA then nope you are not going to put in any AC deodorisation filter. It's not a first priority. PM2.5 is the portion that is the first priority because that is at levels that can cause harm esp to the susceptible group. And for longer term, higher annual PM2.5 levels have been shown to cause significant health effects and increase mortality rates (usual heart attack/stroke/lung problems etc)

Seriously, remove the source of the odour, that's the most effective. ie cleaning the Aircon FCU and changing bedsheets regularly at least twice a month.

The HEPA portion of the original Samsung filter is 37mm thick. It is made of a material called PET. The Taobao is using a cheaper Polypropylene. For the same thickness, the PET type would flow more air and have slightly better filtration, eg > 99%. PP less air and less efficiency, eg 97%.
Hence the needed increase in the thickness of the TB filter so as to maintain CADR.
With 45mm TB HEPA, I'd estimate based on the windspeed that it's doing about 290m3/hr (about 10% lower air speed). With original filter it's 323 m3/hr.

In real life, this is not noticeable. Eg Sharp A40 fitted with original Sharp H13 PET HEPA vs Samsung AX40 fitted with Taobao HEPA 45mm thick. The latter still has higher CADR.


PS. For the fun of it, I have also customisd a 60mm thick Taobao HEPA. It's able to flow around 370 m3/hr. But expensive dey, RMB 180....not so wu hua. For that, I can't fit in the Samsung prefilter, instead I pasted my own prefilter to the HEPA that I asked the TB seller to include a thick roll FOC (it's those fine synthetic netting that you see on the Sharp HEPAs). I could, fit in the Samsung back cover, so all is good.


I also do this 45mm trick for my Sharp KC-840. Just managed to squeeze in 45mm, it's a tight fit coz the Sharp back cover has a curve part that could hit the HEPA a wee bit. But still can lock-in securely and the prefilter can do it's job. FOr the Sharp, it's a bit different, with the TB 45mm HEPA it's able to flow about 5-10% more air.

LG PS-R459 and LG LA-Q379SB all can fit the 45mm as well. Also can flow about 5% more air.

If I were to hazard a guess, it's all down to the centrifugal fan blade design and also rpm vs torque, wattage kind of relationship. The Samsung AX40 may be "geared" more for speed. The others have more torque.


Disclaimer : Of course it all boils down to personal choice. If you are still young and use 1 unit for your own room/own use, then original filters shd be decently affordable to 99% of the people out there.
But if you have a family of 4 and old-age parents/older-age grandparents and the kids are cared by them in the daytime thus need to run like 5-10 units in 2 or 3 homes + filtering nearly the whole unit, then it's going to hurt your wallet. Every filter and every watt counts

 

[WussRedXLi]

There is another type of material used in HEPA filter, called borosilicate. Something like microfiber or something. It's used in the Dyson air purifier fan. It's also used in the cleanroom HEPA filters.

You can touch the material at Vivo BEST, they have a cut-away DYSON sample there. It's very fluffy to the touch.

I am very sure Dyson is gonna suck your blood via replacement HEPA filters.

 

[kasco]

Hi WussRedXLi,

Thanks for the detailed reply.
Just ordered one AX40 to try.

 

[kasco]

Hi WussRedXLi,
Planning to order from TaoBao the Hepa filter so pls recommend should I buy the one with cardboard edge or without cardboard edge for AX40? Size to use is 30cmx30cm?

Thanks in advance.

The above DIY can also use be in the Samsung AX40 (Samsung is 280mm x 310mm LxW...need to plug it up more). I use it during the non haze months for rough use. Coz output would be ~ 200m3/hr-230m3/hr, the wattage that I measured from the socket with a digital multimeter is 19W. It maybe causes the Samsung AX40 to spin slower due to resistance, somehow the AX40 draws less current from the wall socket then.