Patent ID: 8528831

Claim:
A programmable thermostat for controlling space conditioning equipment comprising: a temperature sensor; a display panel including a system efficiency display graphic; a clock; a processor; memory coupled to said processor for receiving a manufacturer preselected default program set for at least one of a heating and cooling mode, said manufacturer preselected default program set defined by a plurality of manufacturer preselected default time and temperature programs, each manufacturer preselected default time and temperature program including a manufacturer preselected default program time value and a corresponding manufacturer preselected default program temperature value, for each of the at least one heating and cooling said memory also receiving a user selected desired program set for at least one of the heating and cooling mode, said user selected desired program set defined by at least one user selected desired time and temperature program which includes a user selected desired program temperature value, and a manually selectable input element for initiating a change to the user selected desired program temperature value; said processor including comparing means for comparing the user selected desired program temperature value to the manufacturer preselected default program temperature value for a corresponding manufacturer preselected program time value and calculating a resulting efficiency level which is displayed upon said system efficiency display graphic of said display panel.