" wrote:

was there a vent line on that fan?

The heating element is mounted inside of a bowl. There are vents
leading into the room all around the edge of the bowl (between the
edge of the bowl and the edge of the can). The fan is mounted on
the top of the bowl. I think it is supposed to draw air in from one
side of the circle and exhaust it from the other side. There are no
ducts or shrouds around the fan.
--
I don't understand why they make gourmet cat foods. I have
known many cats in my life and none of them were gourmets.
They were all gourmands!