No need. It's not necessary. If you want to do this, the structure will be very complicated. Originally, water is heated indirectly in the water heater. It is heated by thermal convection circulation, which results in a reduction in heating efficiency. The Use of Thermal Oil 320 in Solar Energy Thermal oil is generally used as a medium to provide thermal energy and is used in various industrial equipment requiring thermal energy.
Does solar need to add thermal oil before renovation?
Introduction Should I add thermal oil for solar energy before renovation? This is not necessary, because if you want to do this, the structure will be very complicated. Originally, the water in the water heater is heated indirectly and circulates by thermal convection