BACKYARD SOLAR HEATING SYSTEM BEING INSTALLED AT A HOME THE SYSTEM WAS DEVELOPED BY INTERNATIONAL SOLARTHERMICS CORPORATION OF NEDERLAND, COLORADO, WHICH HAS LICENSED A FIRM TO MASS PRODUCE THE SYSTEM. INSULATED DUCTING IS RUN BELOW GROUND TO THE HOUSE WHERE IT CONNECTS WITH THE EXISTING HOT AIR SYSTEM. THE SOLAR HEATING UNIT USES A CUP SHAPED HEAT COLLECTOR RATHER THAN THE FLAT PLATE COLLECTOR WHICH IS CONSIDERED MORE CONVENTIONAL

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