Abstract: A thermostat for cyclically regulating actual ambient temperature, Ta, to either of two values, T1 and T2, for selectable durations. A switch allows T1 to be selected and deselected and a sensor detects Ta, while a controller is connected to the switch and the sensor. The controller is capable of defining T1 and T2 values. The controller further has a memory to store a cycle period duration, a detector to detect when the switch selects or deselects T1, and a timer which establishes T1 duration based on the time between T1 selection and deselection, and establishes T2 duration as at least a portion of the remainder of the cycle period. The controller automatically cyclically repeats the established T1 and T2 durations during each cycle period until T1 is again selected by the switch. A signal generator in the controller generates a control signal corresponding to the difference between Ta and T1 or T2 during their respective durations.

Abstract: A sheet metal housing for containing a heater unit including an electric resistance heating element and a fan for circulating air through the heating element, and for protectively supporting such a heater unit within the interior space of a vertical building wall, the housing having a pair of legs extending below a body portion which encloses the heating element and fan unit, supporting the heating element and fan unit at least a minimum distance above the base of a wall, in which either of the legs can be bent upward to a horizontal position giving the entire housing, including the horizontally extended leg, a length equal to the usual spacing between adjacent vertical studs of a wall, so that the housing can be supported at a height greater than the minimum above the base of a wall by fastening one end of the housing to a stud and fastening the outwardly extended leg to the stud near the opposite end of the housing.