Hello Masters,

I am working on a project where DOAS with ECM motors are used. This is something new to me. Has anyone of you came across this?

The DOAS fans use EC motors and not VFDs. Apparently this fans has unloading efficiency power savings. The fan efficiency appear to be very low (around 50%-60%), but it is compensated by premium EC motors supposed to give power savings. I have no clue on how to model this.

Awaiting your responses,
Regards,
Pramod