Low Voltage Thermostat Heat or Cool Manual Compatible System Type Electric Forced Air Furnaces Gas Forced Air Furnaces Heat Pump with Aux Hydronic Systems Slide Switch Dehumidification Control No Digit Size Standard Digital Dual Transformer Compatible Yes Fan Settings Auto-On Humidification Control Yes Includes Positive Off Yes Minimum Control Temperature 40 Degrees F Maximum Control Temperature 99 Degrees F Key Features Heat Only with Fan Key Pad Lockout No