The Southface Energy Institute provides this free collection of online fact sheets that illustrates many construction practices, building technologies, and current energy codes that were developed to maximize energy efficiency in homes and offices. Ranging from one to six pages in length, the fact sheets address topics such as Passive Solar Design, Advanced Wall Framing, Efficient Lighting Strategies, and many more. There is also a strong focus on ventilation, air conditioning, and mechanical systems, and eleven documents fall within this category. The fact sheets were developed jointly by the Southface Energy Institute and the U.S. Department of Energy.