A lot of people have made these little circulation fans for
the fridge and/or freezer, to keep the temperature constant
throughout the box.
It pulls the coldest air up from the bottom
and shoots it out the top.
I'm still fine tuning the system, so don't know which corner
will be the best place for it.
Once I do, the wire will be
fastened out of the way.
It's made from 2 inch ABS plastic pipe, with a little flange
of 1/8 inch fiberglass from McMaster-Carr
epoxied onto the end.
I inserted a
small computer fan about midway down the pipe.
It pulls the coldest air up from
and shoots it
out the top.
The important thing is power consumption,
not the volume of the air flow.
Of all the small fans at my local computer superstore, this one claims to run on
.02 Amps at 12 volts.
The wire from the fan runs up inside the pipe, and is spliced onto the wire outside the pipe. It's fastened down at the top.