We have a heat pump and I love it, but for the longest time it was beyond me how the thing works. When it finally clicked, it blew my mind. The idea that there’

We have a heat pump and I love it, but for the longest time it was beyond me how the thing works. When it finally clicked, it blew my mind. The idea that there’s heat to be found, even on a cold day, is amazing. It’s actually what made me want to understand thermodynamics more deeply.