Living Room, Recessed Lighting, Medium Hardwood Floor, Sectional, and Console Tables LEED Certified, the house has sustainable features such as bio-based spray foam insulation, a 98% energy efficient boiler, low-flow plumbing fixtures, LED lighting, FSC certified ipe and cedar, recycled cement board panels, bamboo floors, radiant floor heat, and a green roof.  Photo 8 of 14 in 7 Efficient Prefabs That Prove the Power of Modular Design