Traditional AC Fan, especially for the sizes 80mm and 92mm, due to the limitation  on its motor structure, is impossible to increase the airflow volume without  compromise to the substantial increase in acoustic noise level and power consumption.

The newly innovated technology of Y.S. TECH  POWER SERIES AC FAN is out performance at least 80% comparing to the traditional AC FAN.
A 80mm POWER SERIES AC FAN can reach an airflow volume up to 46CFM.

POWER SERIES AC FAN has been proved by a series of reliability tests including breakdown voltage, insulation resistance, high temperature and life tests.
A Comparison of Power Series AC Fan and Traditional One
Input Voltage:115VAC/60Hz Speed (RPM) Max. Airflow (CFM) Power Consumption (W) Noise dB(A)  Life at 40¢J
FV18025LB-A (POWER Fan)   2,900 37.0 2.0 33.8  80,000
Traditional AC Fan    2,900 22.0 11.0 34.5 55,000
FV18025HB (POWER Fan)   3,600 46.0 3.6 39.8 75,000