... Solar water heater 2. SRCC, CSA, Solar Keymark, AS/NZS 2712 certified 3. Continuously improved design solar, solar water heater, solar collector, evacuated tube & heat pipe, solar ... 80" Apricus AP range of evacuated tube solar collectors are suitable for both residential and commercial ... carrying heat back to thestorage tank. Gradually throughout the day the tank is heated up.Installation EffeciencyThe ...