Tiny aircon

A tiny window AC, good for dioramas but can use a TEC module

Front takes 40mm fan + heatsink, rear takes another 40mm fan+heatsink

Designed for a 30mm TEC IIRC (it has a 40x40mm space)

sandwich fan+heatsink+TEC+heatsink+fan, push into the frame, then lower that into the backshell and press on the front.

some melting / drilling may be required for the wiring.