Aquasun 300L Non-Pressurized Solar Water Heater The Aquasun 300L non-pressurized is a gravity-fed solar water heating system suitable for larger households, guest houses, small hotels and other applications requiring a high volume of hot water. Key specifications Specification Details Brand Aquasun Capacity 300 Litres System type Non-pressurized / gravity-fed Tank Stainless-steel construction Solar collector Vacuum-tube solar collector Insulation High-density polyurethane foam Operation Thermosiphon / natural circulation Typical users About 4–6 people, depending on usage Installation Rooftop Hot-water pressure Gravity-fed; not mains-pressure at the outlet Application Homes, guest houses, small businesses, institutions What is included Typically: 300L insulated storage tank Solar collector/vacuum tubes Mounting/support frame Plumbing connections Auxiliary/assistant tank Installation accessories