3 ms·
https://www.3m.com/3M/en_US/energy-conservation-us/applications/passive-radiative-cooling/ https://www.3m.com/3M/en_US/energy-conservation-us/applicati... 3M s
by mensetmanusman 2y ago
https://www.3m.com/3M/en_US/energy-conservation-us/applications/passive-radiative-cooling/ https://www.3m.com/3M/en_US/energy-conservation-us/applicati...
3M sells them for grocery store roofs in the US.