CODEX_LVL5 t1_iv8p5sp wrote
Reply to comment by motogucci in Researchers designed a transparent window coating that could lower the temperature inside buildings, without expending a single watt of energy. This cooler may lead to an annual energy saving of up to 86.3 MJ/m² or 24 kWh/m² in hot climates by mossadnik
Careful, these can wreck double paned windows. They increase heat beyond normal thresholds because the reflective coating is supposed to be on the exterior window, not the interior one
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