All units should be inspected regularly and adequately maintained to ensure maximum performance.
A high deposit of grease or dirt on the impeller could cause an imbalance of the impeller, airflow problems, and damage to the motor.
Units should be cleaned every 10 to 12 months for general cooking or 6 to 8 months for charcoal or barbecue applications.
Care should be taken not to damage the impeller and motor. It is recommended they be removed from the unit before a thorough cleaning.
Faulty or dirty grease filters in the canopies can cause paint or grease deposits inside the fan. This will very quickly affect the balance, vibration and noise level, which can impact on overall performance.
It is important to keep a close watch on the filters in such installations as spray booths and kitchen exhausts.