Cover for Red Sun heater
It hides a wall socket and end of the cable.
In my case cable is coming out of the ceiling close to the wall socket on the beam.
It also covers the hook for the chain.
Dimensions: with 84mm, depth 97mm, height 117mm
Check also my other designs: https://www.prusaprinters.org/social/201278-hans/prints
The author hasn't provided the model origin yet.