PRO1 IAQ Low Voltage Thermostat: Heat and Cool, Auto, 2 Heating Stages - Conventional System, AdjPRO1 IAQ Low Voltage Thermostat: Heat and Cool, Auto, 2 Heating Stages Conventional System, Adj Standard thermostats are most commonly used to control the temperature of conventional forced air systems or heat pumps in residential and light commercial settings, such as offices, restaurants, or retail stores. They're programmable and allow users to select temperature settings for different times of the day or different days of the week. Brand PRO1 IAQ