Comment by andai

That's a very cool fridge. But how much difference does that make in practice?

Air doesn't have much mass, right? How much energy does it actually cost to cool the air in a fridge? (vs the solid parts of the fridge, and the food)

Looks like the OP's fridge uses 10-20x less power than a typical fridge, is that entirely due to the air not spilling out?