Cooling Fan Basics

1. **Fan Size**:

This parameter represents the physical dimensions of the fan, typically measured in millimeters (mm).  
2. **Rated Voltage**:

Expressed in volts (V), this refers to the optimal voltage at which the Cooling Fan operates efficiently over an extended period.  
3. **Speed**:

Measured in revolutions per minute (RPM), this indicates the number of rotations completed by the fan blades in one minute.  
4. **Airflow**:

One of the most intuitive indicators of a fan's performance, airflow is generally measured in cubic feet per minute (CFM).  
5. **Current Consumption**:

Represented in amperes (A) or milliamperes (mA), this parameter reflects the power consumption of the fan during operation.  
6. **Wind Pressure**:

A measure of the fan's blowing force, expressed in pascals (Pa) or millimeters of water column (mmH2O).  
7. **Bearing Type**:

The bearing is a critical component of the cooling fan, significantly impacting its longevity and reliability. It is one of the key factors to consider when selecting a fan.  
8. **Noise Level**:

Typically measured in decibels (dBA), noise level is an important parameter for users concerned about operational sound levels.  
9. **Optional Features**:

Additional functionalities may include feedback signals such as FG (Frequency Generator) or RD (Rotation Detection), as well as speed control mechanisms like PWM (Pulse Width Modulation).