The Grant Aerona3 Wireless Smart Thermostat (No Receiver) is a smart thermostat designed to work with heating systems, specifically for controlling Grant Aerona3 heat pump systems. This unit does not come with a receiver, making it perfect as an additional thermostat on a system that already has a receiver. Here are some key features and details: Wireless Operation: This thermostat operates wirelessly, eliminating the need for complex wiring between the thermostat and the heating system. Compatibility: It is designed to work with the Grant Aerona3 range of heat pumps. Smart Features: As a smart thermostat, it includes features like app-based control, remote access, scheduling, and energy-saving modes. Energy Efficiency: It helps optimize energy usage by allowing users to set and adjust temperatures based on their schedules, making it an energy-efficient option for homes or buildings using heat pumps. In short, the Grant Aerona3 Wireless Smart Thermostat (No Receiver) offers the convenience of smart, wireless control for Grant Aerona3 heat pumps, providing remote temperature management without the need for a hardwiring. Grant Aerona3 Wireless Smart Thermostat (No Receiver)