Smart thermostat upgrades and furnace to heat pump conversions have never been simpler with the Invita® Wi-Fi Thermostat 564. Using just the existing 2 wires from any living space, the Invita easily connects to an HVAC Interface Module in the mechanical room. It works with most types of heating and cooling systems, including conventional, heat pump, and dual fuel, and offers built-in fan, relative humidity, and ventilation control. The Watts® Home mobile app provides real-time remote monitoring, setting adjustments, and notifications if issues arise with the HVAC system. No more pulling new wires, no more patching and repainting walls, and no more changing batteries. Just an easy-to-use, energy-efficient comfort for the entire family.