A radiant heating and cooling system is built into the home’s aluminum components. Heat comes from groundwater and solar power, and a second-floor roof garden helps collect rainwater. Photo 4 of 6 in Here’s What We Can Learn From Japanese Prefab Homes

Here’s What We Can Learn From Japanese Prefab Homes

4 of 6

A radiant heating and cooling system is built into the home’s aluminum components. Heat comes from groundwater and solar power, and a second-floor roof garden helps collect rainwater.