G-SOLAR MULTICOLLECTOR, another SOLUTION model of G-SOLAR, is a closed-circuit, (open-water feed) model designed to support the energy needs of central systems. The water rapidly heated by the vacuum tubes circulates, between collectors and central system (heat pump, boiler, tank etc.) by a circulation pump, and provides a high energy saving for both space heating and hot water requirements. Ideal for hotels, apartments, facilities, etc., with all existing heating systems.