Ventilators
Leak tests
Pressure
Rotational motion
Direction of movement
Classification systems
Position
Designations
Components
Test pressure
Codes
Vocabulary
Prime movers
Fans
Mechanical transmission systems
Control devices
Fire risks
Thickness
Industrial
Cases
Link: BS EN ISO 12759-4:2019 Fans. Efficiency classification for fans Driven fans at maximum operating speed
Source: BSI Standards
