Before making solar radiators, the materials needed are: insulation foam board, wood frame, black paint, foam glue, glass sealant, wood strip, and can. The size of the wooden frame shall be determined according to the width of the can. 1. Firstly, heat preservation foam board with a thickness of 3-5 cm is embedded on four sides of the wooden frame; Make a row of holes on the shorter side, and the opening on the top of the can can cover the holes with the best size. 2. Each can shall have two small holes at the head and tail, and the cans shall be neatly lined up with foam glue
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