Summary

This is a housing for a cheap and cheerful thermostat named HW-557.

I modeled this housing using this dummy board: https://www.thingiverse.com/thing:2483210

As can be seen on the pictures the buttons seem to be offset, so this is work in progress as I might update the design to correct this..

Please note that the holes for the bolts are closed. This allows one to choose how the housing will be mounted/assembled. Drill them to your liking. All cables are supposed to go through a cutout in the back of the housing, including the temperature sensor leads.

EDIT: new print looks better, but the switches are still offset. This can be mitigated by re-drilling the holes on the electronics and on the printed housing - see picture.

EDIT2: ver. B features a flange for better centering of the two prints. The top print is also scaled to 101% for easy assembly. The holes were moved 0.5 mm down and to the right. Also increased the hole diameter.

EDIT3: version C is the same as version B except for the to marked buttons. Not that it was really needed, but I decided to have some fun.