Here is the research of the HEPA
air filter results on the market.
The green colour results, higher better.
- Smart Air Original: filters 99.9% of PM0.3; CADR unknown; covers 11-20 m2
- Air-O-Swiss P320: filters 99.97% of PM0.3; CADR 86 m3/h, covers 16 m2
- Panasonic F-30C3PD-D: filters 99% of PM0.3 and 89% formaldehyde; CADR 163 m3/h, covers 30 m2
- Philips AC4025: filters 91.2% of PM0.3 & 95% formaldehyde; CADR 127 m3/h, covers 20 m2
- Xiaomi: filters 99.3% of PM0.3 & 91% formaldehyde; CADR 406 m3/h, covers 48 m2
According to the results, Xiaomi and Philips are worth to buy.
1. Some one selling the filter for fan to clean the air for $19.90. The one will block the air follow, and cannot filter the air. Totally a scam.
2. HEPA standard filter cannot be washed. Best filter has the Active Carbon filter inside to absorb the unhealthy air. Same as the military gas mask, the filter of the gas mask is one time use element, and need replace after using a well.
The PM 0.3 things will stick on the filter net. Water cannot clean it.The washable filter is just like the aircon, and worse than aircon because the aircon can cooling the air, but air filter cannot.
If you look at the philips advanced model and Xiaomi, the filter need replace not washable.