4 Inch Exhaust Fan 240v fan for Fan Ventilation

Prototyping and Engineering Tips from Robogears

• Safety First: CRITICAL: This fan operates on 240V AC Mains. Ensure all connections are properly insulated with heat-shrink tubing or enclosed in a junction box. Never touch the wires or the motor housing while the fan is plugged in. Always use a 3-pin plug with a proper Earth (Ground) connection if the fan frame is metallic.

• Airflow Direction: Look for the small arrows embossed on the side of the fan frame. One arrow indicates the Direction of Rotation, and the other shows the Airflow Direction. Installing the fan backward is a common mistake that can lead to heat buildup instead of exhaustion.

• Finger Guards are Mandatory: Because AC fans have higher torque and sharper blades than small DC fans, they can cause serious injury. Always install a 120mm Metal Finger Guard on both the intake and exhaust sides to protect fingers and loose cables.

• Noise vs. Performance: AC fans are generally louder than DC fans due to the 50Hz/60Hz induction hum and higher RPM. If noise is a concern in an office environment, consider using a Fan Speed Controller (Triac-based) to lower the RPM when maximum cooling is not required.

• Maintenance in Dusty Environments: If used for kitchen exhaust or workshop ventilation, grease and dust will accumulate on the blades. This imbalance causes vibration and bearing failure. Periodically clean the blades with a dry brush or compressed air to maintain optimal performance and silence.

Package Includes

• 1 x 4-Inch Exhaust Fan (240V AC)

Disclaimer: This product is intended for use with high-voltage AC electricity. Installation should be performed by someone familiar with electrical safety standards. Do not expose the fan to direct water or excessive moisture unless it is specifically rated for IP-standard waterproof use. Always disconnect the power before attempting to clean or move the fan.