A good rule of thumb is to mount it 52 to 60 inches off of the floor.
Mounting thermostat exterior wall.
One other thing to consider.
Exterior walls are also a no go because they are often cooler than other walls in the home.
Fiberglass insulation is great for preventing drafts from affecting thermostat operation.
Putting a thermostat directly above a heater is ok but not ideal.
Once i installed this plate behind the thermostat i had no more issues.
It s fine but not great to install a thermostat above the heater placing a wall thermostat directly above a wall heater is not ideal.
It was really hard to keep up with manually adjusting the thermostat offset.
During the winter this caused a 5 degree difference when the temperature dropped.
If a thermostat has to be placed on an exterior wall make sure the back is well insulated to prevent false readings.
Our thermostat is mounted on a wall that is opposite our garage.
Since heat rises it can impact your reading.
How to choose a thermostat for your home.
Tighten the screws securely.
Mount the thermostat base by gently pushing the excess wire back into the wall opening and plugging the hole with a fire resistant material.
What happens in the specific area being considered for thermostat placement has to be thought out.
If the location takes direct sunlight at certain times of the day especially low sun during the winter that can bring the temperature on the thermostat up by 10 to 15 degrees.
Mount the control unit to the base using the screws included with your thermostat.