The reversible heat pumps i-SHWAK V4 series are designed for residential and commercial applications, these units are extremely versatile and can operate in heat pump mode with the ability of producing hot water at a temperature of 63°C using the electric heaters for environmental heating and sanitary applications. The new i-SHWAK V4 system, which is the result of the evolution of the previous model V3, is the ideal solution for the total home climate control (with the accessory Hi-T). For new or already existing house if equipped with a radiant floor or fan coil as heating system, with feeding from electric power network and a renewable energy sources. The INVERTER compressor with brushless DC motor technology, matched with electronic expansion valve, pump and variable speed blower always with brushless motor, as well as the integrated circulators, optimize the power consumption and the operation efficiency of the refrigerating components and of the entire system.