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Bman10119 t1_iv7mlfd wrote

Reply to comment by RedditTab 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

I've lived in plenty of places with snow and cold winters that saw the sun in the winter :p

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ilep t1_iv80u2w wrote

Further north you go, longer the period when sun doesn't rise above the horizon. Arctic circle marks the latitude when sun doesn't rise at certain time of the year.

Just saying. So this kind of coating would not make difference as heating from direct sunlight would be small in any case.

But I would assume there would be different products for different regions like they are these days.

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