Love my Sanden 315L Tall tank Heat Pump System. Pure Electric provided and arranged my install (in regional SW Coast VIC 3231) smoothly. My install is a little tricky with tank inside and heat pump unit a couple of metres away outside. They assisted me to setup my wifi timer circuit to get flexible scheduling with instant on if I want and direct energy monitoring. Insanely quiet, low power consumption (avg 3.1kwH/day now from my Solar, timed during the day for 3 adults) and totally reliable. Long life Stainless Steel tank, and CO2 refrigerant so the lowest possible GWP at the products end of life, unlike many HFC based refrigerants.