Lux 5-2 Day Programmable/Non Programmable Heating & Cooling Thermostat

For Use On: Most 24V Heating & A/C Systems 1 Heat/1 Cool: Gas, Oil, Electric, or Single stage Heat Pump Systems 2 wire heat only hydronic systems (Hot water baseboard & radiator) Product Features: Easy to install and use Flexible Programming Operation: Selectable 5/2 Day, 7 Day, or non programmable User Option 2 or 4 periods per day Keypad lock for unauthorized users 3 Year Warranty Temporary override, and manual hold Not For Use On: Multi-Stage Heat Pumps Physical Dimensions: 3-Wire Hydronic Zone Valve Systems Width = 5.375” (136 mm) Line Voltage Systems (120/240 VAC)