Ventilation
Noise and IP considerations for fan exports
Fan exports fail expectations when noise and IP are afterthoughts. State both on the datasheet and the PO.
Noise
Publish sound data and mounting isolation needs.
What is acceptable in a plant may not suit a school.
IP and weather
Outdoor fans need weather protection; indoor dusty sites need different guarding.
Motors and terminals must match the environment.
QA
Reject silent substitutions with worse IP.
NMF checks nameplate data against the agreed spec.