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