Shipping Containers to Become Condos in Detroit

[Kaleva]

11. But they are also 4 times more energy efficient.

From the article:

"A shipping container doesn't want to be a building," Case explains. "So you have to do quite a bit of gymnastics that cost money." But the Box Office is four times more energy efficient than a typical office building, and that's where Case says he'll see savings. "There's no way for air to come in or out of a shipping container," he says, "unless you want it to."