These DC motors are using brushless schemes, making them astoundingly efficient and quiet.
They don't toss heat off like the motors we know and love.
The fan action assures good circulation over the electronics -- which is SURE to be encapsulated in epoxy. (moisture-dirt)
The dang thing is going to run a 100 years, no doubt.
It's a terrific retrofit item for the wealthy Green leaning client. Because it's so efficient. One can leave it running much longer after business has been done.
It's also the perfect solution to excessively damp basements. It may pay to have one installed just for human comfort.
