This technology is designed to optimise the operation of the heat pump according to the environmental conditions. In order to achieve and maintain the desired pool water temperature, the inverter heat pump adjusts the compressor operation by changing the voltage and frequency. Zodiac heat pumps have the ability to set the operating mode manually – from fast and powerful heating to slow, economical water temperature maintenance (when using a cover). Alternatively, with Heatselect technology, the operating speed of the heat pump automatically adapts to the actual energy consumption needs.