The tekmarNet (R) Thermostat 532 is a communicating thermostat designed for one stage hydronic heating systems. Simple up and down buttons and a display with large type make this thermostat easy to read and use. It has two auxiliary sensor inputs that can be assigned to measure room, floor, or outdoor temperature. An optional floor sensor protects the floor from overheating and enhance comfort. The 532 can be wired using two or four wires to connect to tekmarNet zoning controls, or can be installed as a stand-alone thermostat using three wires.