Specifications Rated Voltage :220V Frequency:50/60Hz Starting Voltage:180V Rated Speed:2100/2500 RPM±10% Air Flow:25/31 CFM Static Pressure:3.3/4.7 mm H 2 O Rated Current:0.08/0.07Amp Input Power:17/15Watts Noise Level (A):26/31dB Direction of Rotation: Counter-Clockwise Motor Protection: Impedance Protected Operation Temperature:-20℃-80℃ Operation Humidity:20%-80% Bearing System: Sleeve Bearing Life at 25℃:30,000hours Power Plug: EURO type 2 Pins Weight:280 g Description Motor Design: Reliable Brushless Motor Construction Insulation resistance:10 Mega-ohms minimum at 500 VDC Dielectric Strength:1500VAC/min, current<5mA Motor Protection: Impedance protected Noise Level: Measured in a semi-anechoic chamber With background noise level below 15 dBA The fan is running in free air with Microphone at a distance of one meter From the fan intake Air Performance: Measured by a double chamber. The value is recorded when the fan speed is stabilized at rated voltage Tolerances:±15% on rated power and current Frame: Die-Cast Aluminum Painted Blade: Thermoplastic PBT Lead Wire:22AWG