Aegis temperature control products are designed to provide optimum comfort while saving as much as 20% on heating/cooling costs. Aegis Thermostats automatically "set back" heating/cooling when residents are asleep or away and rstores the temperature when the residents wake up or return home. Aegis temperature control products come in a wide variety of styles for most applications and include Thermostats, Outdoor Temperature Sensors and Programmable Energy Saver Modules (PESMs).