Clean air fans with drive exhaust odorous, hot, or stale air. These fans come with a drive package that includes a motor, sheaves, belts, and bushings. Belt-drive fans are typically quieter and allow for more control over the fans' blade speed and airflow than direct-drive fans.

Clean air fans without drive are primarily used to exhaust odorous, hot, or stale air. These fans do not come with a drive package, so the user must provide the drive components. Belt-drive fans are typically quieter and provide more control over the fans' blade speed and airflow than direct-drive fans.

High-pressure clean air direct-drive fans exhaust odorous, hot, or stale air for general ventilation. They feature pressure-optimized propellers that are designed for high static pressure applications. These fans use a propeller that's directly mounted on the motor shaft which reduces friction and improves efficiency when compared to a belt-drive fan. Direct-drive fans have fewer moving parts and typically require less maintenance than belt-drive fans.

Flammable vapor fans with drive are used in areas where combustible dust or flammable gases are present. These fans come with a drive package that includes a motor, sheaves, belts, and bushings. The housing and blades are made from spark-resistant materials and are rated for use in these conditions. Belt-drive fans are typically quieter and provide more control over the fans' blade speed and airflow than direct-drive fans.