Developed to the fully building-integrated design brief, theH2OSS thermal solar collector is a flat-plate collector designed asa forced-circulation home solar water-heating system. The inno-vation lies in its long slim geometry enabling it to slot into apre-profiled aluminium gutter channel used for rainfall evacua-tion. This aluminium gutter channel profile can be built in place, inone piece (running up to 20-odd metres long), using the industrialextrusion process.The gutter channel obviously retains its rainfall evacuation role.The gutter channelling comes in an array of styles and colourwaysFig