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JCPenney saved over 47 million kWh and $5 million with variable frequency drive retrofits of rooftop units across 131 stores. The case study describes the decision process and results of this successful program.

Richardsville Elementary School is the first full-scale zero energy K-12 school in the United States. The school building, located in Kentucky's Warren County Public School District, uses many innovative strategies to conserve energy including dedicated outdoor air systems (DOAS) with dynamic reset, insulated concrete form (ICF) wall construction, daylighting, and ground source heat pumps, among others. The school has both thin film and crystalline silicon photovoltaic panels.