When is a fan considered EC?

When is a fan conisdered EC'

How does Electronic Commutation (EC) compare to conventional technologies? What are the defining traits of an EC fan? Here are the answers:

An EC fan features INTEGRATED electronics

EC Motor

The EC motor comprises of an integrated system. It contains (a) Conversion Electronics, (b) Speed Control Electronics, (c) Stator and (d) DC rotor.

EC Formula

“If a fan is sold as a complete assembly, efficiency [..] shall be assessed by direct measurement  of Pe / Ped and Pu “

Systems that feature individual components are NOT EC

Not EC
AC Formula

“ISO standard committee understands that components bought individually are NOT capable of running in peak rated efficiency (ALL of them at the same time).”

Summary Table: EC vs AC comparison

EC vs AC