Low Voltage Thermostat, Application Heat Only, Compatible System Type 2-Wire HVAC Systems, Dehumidification Control No, Dual Transformer Compatible No, Differential Type Fixed, Humidification Control No, Maximum Control Temperature 60 Degrees F, Minimum Control Temperature 60 Degrees F, Number of Heating Stages - Conventional System 1, Number of Zones 1, System Settings On-Off, Temperature Differential 9 Degrees F, Temperature Scale Fahrenheit, Thermostat Type Low Voltage, Voltage 18 to 30V AC