Grid
The specificity and ingenuity of these solar thermic panels are to use refrigerator grills. But beware, not all grids are good and they must be used in the right direction! The grills must be provided with cooling fins and painted black (see photo). They must not be in galvanized steel, the paint will not hold on. Similarly, some refrigerators are equipped with pipes connected by wire, the apparent surface of these grids is not sufficient, they are not interesting for this use.
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