Warning: Undefined array key "visitor_referer_type" in /var/www/vhosts/wordinf.com/core/app/libraries/Core.php on line 98 Ken Kern - Glass... is not required for the collection...
Glass... is not required for the collection of solar heat. The National Physical Laboratory of Israel... has perfected a highly polished metal surface coated with a molecular-thin black layer of special paint, which absorbs more than 90 percent sunlight. The polished metal radiates very little of the heat it receives. ...A south-facing wall fitted out with these plates would really "drink in" solar heat, windows, or no windows.