The White Rodgers 1E65-144 thermostat that controls line voltage to the heating appliance.

The 1E65-144 thermostat has been designed to control electric heating systems such as baseboard heaters, radiant floors, radiant ceilings and convectors. This thermostat is not really geared towards gas appliances such as tube heaters or unit heaters. 

The adapter plate is used to offset the thermostat when an obstruction prevents the thermostat from being mounted directly to the junction box.

The thermostat cannot be used with the following:

- a resistive load under 2 A

- a resistive load over 16.7 A

- systems driven by a contactor or a relay (inductive load)

- central heating systems

This thermostat features a variable output to electric heating appliances to get better control of room temperature.

See attached document for more information.