The Solar Seven range of solar collectors incorporates the best of both traditional evacuated tube and flat plate technologies, whilst bypassing the inherent disadvantages of these solar water heating systems. Solar Seven collectors can be used in pumped or thermosiphon type systems How it works: The Solar Seven Panel is unique Patented design that combines a food grade glycol (maintenance free) suspended in a negative pressure enclosed thermal chamber that surrounds a fluid chamber. The fluid being thermally insulated from ambient conditions is freeze resistant, and easy to clean in hard water areas. *EVT performance at flat plate prices *Frost resistant *Hail resistant *Does not over heat *Aesthetically pleasing *Can be used in poor water areas *Easy to transport and install Solar Seven solar collector is freeze resistant and can be installed in areas that have sub-zero temperatures. The collector naturally stagnates and thus prevents over heating. The patented heat pipe configuration provides for exceptional performance. The manufacture process and the use of best quality materials ensures longevity. The Solar Seven collector in essence is an indirect collector system, thus is ideal for bad water quality areas. Flat plate technology is more affordable solar technology. The collector is locally manufactured and not so exposed to a deteriorating exchange rate, giving the customer exceptional value for money. The 4mm toughened glass provides for the best hail resistance. These 7 reasons amongst others makes the solar 7 flat plate collector THE COLLECTOR to own.