1.The 18-Gauge Commerical Grade Stainless Steel Screen can be removed.

2.There is powerful motor.

3.Digital touch controls 4 speed

4.Baffle Fitler/Noise:30'':1.4 sone(45dB)

36'':3.5 sone(58dB)

42'':7.0 sone(68dB)

48'':8.0 sone(70dB)