Abstract: A method and thermostat for controlling comfort in an area with temperature altering equipment, but no specific humidity altering equipment. An on-off thermostat which mechanically combines temperature and humidity measurements in a predetermined ratio based on a user's perception of comfort. The thermostat does not require an anticipator when used with an air conditioner in a warm and humid climate.

Abstract: A method of controlling dew formation preventing heaters for a copying apparatus which includes a first temperature detecting means for detecting the temperature inside the copying apparatus, with a first reference temperature (T1) being set, a second temperature detecting means for detecting the temperature inside the copying apparatus, with a second reference temperature (T2) higher than said first reference temperature (T1) being set, a humidity detecting means for detecting the humidity inside the copying apparatus, with a reference humidity (H1) being set, and a first group of heaters and a second group of heaters to be controlled by said temperature detecting means and said humidity detecting means.