Comment by dave333

This can also be used to heat and cool a building. Harold Hay experimented with a "Skytherm roof" back in the 1970s and built a house at Atascadero, CA.

https://www.sciencedirect.com/science/article/abs/pii/S09601...

Harold Hay LA Times article: https://www.latimes.com/archives/la-xpm-2007-nov-10-fi-harol...