Seems design flow as the fan make lot of noise even though air circulation is very less.
When outside aqi is 150 or less, it worked fine for 3-4 days keeping the pm level below 50. Later when outside aqi went above 300 in last 2 days (in gurgoan) , this filter become obsolete in 10*12 closed room.

Cleaning pm 2.5 from around 400 level to under 300, it takes almost 2 hours in a 10LX12B X9.5H closed room, as per it's own PM sensor reading. Hardly comes under 250 when running through out nigh...

It does it job well but it takes time to clear out smoke.
Cons- take more time to know info from phone

Good product

Excellent product with very nice features like wifi connected

Too small and useless

Excellent ,easy to operate
Gives me the required data n state of filter. Great product

Excellent product