The system is based on a packaged external units with integrated hydronic module and an internal unit with the electronic regulation. The heat pump provides heating and domestic hot water production. Particular care is taken of winter mode, that thanks to inverter technology is guaranteed beyond traditional units working limits, water production up to 60°C. The heating only heat pump features high seasonal efficiency in heating, using DC inverter technology to modulate compressor operation and deliver the exact amount of energy based on the actual needs of the installation. The units can be coupled with traditional systems or radiant panels, always guaranteeing very high energy efficiency. Installation is strongly simplified thanks to the integrated hydronic module.