Air source/Water source heat pump are  more and more popular today due to their low energy consumption , efficiently providing both heating and cooling for our homes.    However it’s it’s the thermostat that ensures your indoor environment to maintain your home confomt.There are a lot of thermostats available on the market, from the simplistic to sophisticated smart devices with advanced functionality. Here’s what you need to know to pick the ideal pairing for your heat pump system.  Key functionalities on Heat pump Thermostats:    Reversing valve control: Heat pumps have a reversing valve that changes the flow of refrigerant, allowing them to provide both heating and cooling. A specialized thermostat for heat pumps is designed to control this reversing valve effectively, ensuring that the system switches between heating and cooling modes as needed.   Two stage or multi-stages operation: Some heat pumps operate in two stages, meaning they have two levels of heating or cooling capacity. If you have a model that does incorporate two-stage operation, you'll need a thermostat that supports this feature. This ensures optimal control over the heat pump's stages, allowing it to efficiently adapt to varying temperature demands   Emergency heat/aux heat Heat pumps use auxiliary or emergency heat during extremely cold weather or when the system is defrosting. A dedicated heat pump thermostat is equipped to handle this emergency heat function, preventing issues with the system's performance during cold snaps.   Energy efficient operation Specialised heat pump thermostats often come with energy-saving features tailored to the unique characteristics of heat pumps. This may include smart technology, programmable settings, and compatibility with variable-speed systems, all contributing to increased energy efficiency.