How do I mount the thermostat to a wall using screws?
Remove the thermostat back cover and mark the cover hole positions on the wall, with 60mm distance between holes. Drill two 6mm diameter holes in the wall, then fix the back cover with two screws. Finally, reattach the thermostat front cover to the back cover mounted on the wall.
From the official Bosch RT20 Rf Room Thermostat manual, page 25
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