Haze in SG

LG

Korea model: LG LA-Q379
Singapore model: LG PS-R459
Product page
English manual for LG PS-R459

Filters

Filter for Singapore model PS-R459WN available at LG Service Centre
Filter size: 360mm x 340mm x 31mm
Custom filter size: 361 x 342 x 45mm
Taobao shop link: 净化器耗材批发商城 (alww seller with your custom size)
Source

Model differences

LG LA-Q379 (Korea): Brightness control to turn off the LED
LG PS-R459 (Singapore): NPI Sterilization feature

Samsung AX40

Korea model: Samsung AX40H5000GMD / AX40H5000UWD
Singapore model: AX041
Voltage: 220V, 60Hz. The plug is a 2-pin round plug.
Product page
English manual for AX041

Buttons:
First four is touch buttons: On/off; Speed selection; VirusDoctor On/off (single touch) + filter change reset (hold a few secs); Child lock (hold a few secs)
Last four is speed indicator: Auto; High; Low; Sleep

Lights on the On/off touch button also functions as air quality indicator: Red (Contaminated) > Orange > Yellow > Green > Blue (Clean)
VirusDoctor is Samsung's fancy name for ionizer function, default is OFF.

Model differences

Samsung AX40 (Korea): 3rd button on the control panel is VirusDoctor on/off (single touch) + filter change reset (hold a few secs)
Samsung AX041 (Singapore): No buttons to turn Virus Doctor on/off

Filters

Filter model: CFX-2TCD Integrated HEPA/Deodorization Filter
Original filter replacements can be found on Qoo10
Filter size: 310mm x 280mm x 40mm
Custom filter size: 310mm x 281mm x 45mm (60mm depth is possible but the pre-filter will need to DIY as the original will not fit anymore)
Custom filter on Taobao: 适配三星AX40H5000GMD/UWD等机型高效HEPA滤网（个性定制款）
Taobao shop link: 净化器耗材批发商城 (if you require other sizes)
Alternate cheaper DIY for use during non-haze months
Prefilter: No need to use it if it's 45mm. Use it for 60mm.

Troubleshooting

Lights blinking and not functioning?

Sharp FU-A28E

Product page
Filter size: 310mm (or 305mm?) x 285mm x 25mm
DIY filter 1: using Fellowes HF-230 True HEPA H13 grade filter (available from Amazon)
DIY filter 2: from Taobao
Tips, original filter

Sharp FU-A80E

Product page
Filter model: FZ-A80SFE
Model in China: FU-A420S
Filter equivalent model in China: FZ-A420HF
Filter size: 390mm x 285mm x 37mm

Sharp FU-Y30E

Product page
Filter model: FZ-Y30SFE
Filter equivalent model in China: FZ-Y180SFS
Filter size: 380mm x 240mm x 32mm
Taobao item link: 夏普空气净化机过滤网定制(适合FZ-180HFS/FZ-240HFS/FZ-A420HF)

Sharp KC-930E

Product page
Filter model: FZ-Y30SFE (Dust collection/deodorizing), FZ-Y30MFE (Humidifying)
Filter equivalent model in China: FZ-200HFS
Filter size: 378mm x 236-237mm x 31-32mm
Source 1, Source 2

Sharp KC-A40E

Product page
Filter model: FZ-A40HFE (HEPA), FZ-A40DFE (Deodorization), FZ-A60MFE(Humidifying)
Filter size: 370mm x 234mm x 31-32mm
Custom filter depth: 45mm. The seller does only 35/45/60mm. The original filter is 31mm so the active carbon filter cannot be used with this custom filter.
Taobao shop link: 净化器耗材批发商城 (alww seller with your custom size)

Sharp KC-A50E

Product page
Filter model: FZ-A50HFE (HEPA), FZ-A50DFE (Deodorization), FZ-A60MFE(Humidifying)
Filter size: 400mm x 250mm x 40mm or 410mm x 255mm x 38mm ?
Filter equivalent model in China: FZ-280HFS
Custom filter depth: 45mm
Taobao shop link: 净化器耗材批发商城 (alww seller with your custom size)
Source