Great question! “PDRC surfaces are designed to be high in solar reflectance (to minimize heat gain) and strong in longwave infrared (LWIR) thermal radiation he

Great question! “PDRC surfaces are designed to be high in solar reflectance (to minimize heat gain) and strong in longwave infrared (LWIR) thermal radiation heat transfer through the atmosphere's infrared window (8–13 µm) to cool temperatures even during the daytime.” https://en.m.wikipedia.org/wiki/Passive_daytime_radiative_cooling https://en.m.wikipedia.org/wiki/Passive_daytime_radiative_co... I also posted this as a separate post for visibility. It’s an amazing technique that more should be aware of.