To promote energy efficiency, and for other purposes.

[AI summary unavailable — showing source text] Energy Efficiency Improvement Act of 2015 Better Buildings Act of 2015 This bill requires the General Services Administration (GSA) to: (1) develop and publish model leasing provisions to encourage building owners and tenants to use greater cost-effective energy efficiency and water efficiency measures in commercial buildings, and (2) develop policies and best practices to implement the measures for the realty services provided by the GSA to federal agencies. The Environmental Protection Agency (EPA) is required under the Energy Independence and Security Act of 2007 (EISA) to develop a voluntary Tenant Star program within the Energy Star program to recognize tenants of spaces in commercial buildings that voluntarily achieve high levels of energy efficiency. The EPA may develop a voluntary program to recognize commercial building owners and tenants that use high-performance energy efficiency measures in the design and construction of leased spaces. Energy Efficient Government Technology Act The EISA is amended also to require: (1) each federal agency to coordinate with the Office of Management and Budget, the Department of Energy (DOE), and the EPA to develop an implementation strat…