This guidebook focuses on increasing the energy efficiency of homeless facilities to free funds for other operations while increasing comfort for homeless residents. Section I outlines a four-step strategy for approaching energy efficiency in renovations of homeless facilities. Section II offers suggestions on what to look for when buying a building to renovate and energy-efficient design options. Section III discusses energy- saving measures for ventilation, windows, insulation, water systems, lighting, heating and air conditioning, and appliances in existing buildings. Section IV addresses operation and maintenance issues, including information about utility rate structure. Finally, Section V provides resources for further information.