The Home Improvement Catalyst (HI Cat) is an initiative within the Residential Buildings Integration (RBI) program. Typical home improvement transactions provide a critical opportunity to encourage homeowners to improve energy efficiency in their homes through advanced technologies and practices. The Joint Center for Housing Studies of Harvard University estimates that U.S. homeowners in aggregate spent $192 million on all home improvements, almost half of which include opportunity areas to affect home energy performance, and homeowners spent $52 billion on home maintenance activities alone in 2013.