Reader-added tags as of now consist of "Happens a lot" and "Mis-order".

This is overcomplicated, just get a regular wall-socket or PC fan and trigger the feed for it with a simple Relay triggered by the heat-generating device.

There's a real satisfaction in handling a problem yourself, when you are able.

And the non-returnable mistakes can be held for future use.

Lumber must be really expensive in Japan.