Green Renovation Gets A Boost From Online Learning in Building Science for Energy Efficient Homes IBS, Las Vegas, NV January 22, 2015 - GreenHome Institute (GHI) announces the immediate availability of Building Science Basics online training course by Blue House Energy (BHE). The course ensures everyone involved in energy efficient home construction and renovation has a common understanding of how heat, air and moisture interact and affect the house’s performance. The result is lower energy costs, comfort, and health in homes.