CT230-GA Features: -Master thermostat with a Dual voltage power module is required for all floor heating.-Each master thermostat requires a minimum of one dual voltage power module. Specifications: -System installations utilizing more than 240 square feet of floor heating product when operating on a 240 volt circuit.-Use also when operating a floor heating system on a 120 volt circuit with more than 120 square feet of floor heating product.-Each additional power module provides an additional 15AMPS of service and up to 10 power modules can be added to each master thermostat.-Master thermostat 12VDC programmable with sensor.-Dual voltage power module with GFCI, 5mA, 15AMP. Dimensions: -Width: 3".-Thickness: 1.5".-Length: 2".