Ventilation Fan Encyclopedia: Cleaning and Maintenance of Ventilation Fans

/ July 23, 2025

Exhaust Fan Guide: Cleaning and Maintenance of Ventilation Units

Over time, the filters in your exhaust fan can become clogged with dust and debris, which reduces airflow and efficiency. To keep your system running smoothly, it's recommended to clean the filter every two weeks. Here’s how you can do it:

  1. Unplug the power supply to ensure safety before starting.
  2. Loosen the screws on the air valve and remove the back cover.
  3. Disconnect the wiring connector and take out the filter along with the back cover.
  4. Prepare a cleaning solution using mild detergent and water at the right concentration.
  5. Place the filter and back cover in the solution and let them soak for 10–15 minutes. Rinse with clean water, but avoid submerging or directly spraying water on the motor.
  6. Reinstall the filter and back cover carefully. Make sure there is enough space between components to allow proper airflow and humidity control. If needed, use desiccants or dehumidifiers to maintain balance. When filling the water cooler, use distilled water whenever possible, as it has fewer impurities and bacteria, helping to prevent microbial growth during condensation. Always keep the water level in the sink safe and replace it regularly.

After prolonged use, the filter and air curtain may also get blocked, affecting airflow and cooling performance. Regular cleaning every two weeks helps maintain optimal function. Keep the distance between units adequate to ensure good air circulation and humidity balance. If necessary, consider using desiccants or dehumidification systems.

Tips: How to Clean Grease from Fans

  1. Remove the fan and wrap it in cotton yarn to wipe away dust. For stubborn grease, use a damp cloth to wipe it off, then rinse and dry before reassembling.
  2. Take off the fan blades and soak them in warm water mixed with a few drops of dish soap and 50 ml of vinegar. Let them soak for 15–20 minutes, then scrub with a clean cloth to remove grease effectively.

Cleaning Exhaust Fans

Since exhaust fans are electrical appliances, it’s generally not advisable to disassemble them for cleaning. It's best to contact a professional service for thorough and safe cleaning.

Maintenance Tips for Exhaust Fans

  1. Avoid frequent switching on and off, as this can reduce the lifespan of the fan.
  2. Keep the fan away from high temperatures and direct sunlight to prevent blade deformation.
  3. Regularly clean oil deposits from the fan blades, grilles, and panels. Avoid using corrosive chemicals, as they can damage plastic parts and paint.
  4. Apply lubricant to the motor periodically to ensure smooth operation.
  5. When reinstalling the fan after cleaning, make sure all nuts are tightened properly to prevent the blades from coming loose and causing accidents.
  6. For filter-type exhaust fans, clean the mesh regularly. If the activated carbon filter gets wet, it may lose effectiveness. Always follow the manufacturer’s guidelines and have the unit professionally inspected and cleaned to extend its life.

Recommended Reading:

  • Ventilation Fan Encyclopedia: Installation Guidelines for Ventilation Fans
  • Ventilation Fan Encyclopedia: Usage Precautions for Ventilation Fans
  • Ventilation Fan Wikipedia: 7 Tips for Buying a Ventilation Fan
  • Ventilation Fan Encyclopedia: Basic Parameters of Ventilation Fans
  • Ventilation Fan Encyclopedia: Where Are Smart Ventilation Fans?
  • Ventilation Fan Encyclopedia: Classification and Ventilation Methods of Ventilation Fans
  • Ventilation Fan Wikipedia: What Is a Ventilation Fan?

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