Energy Star
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US EPA guide to energy-efficient products and homes.
More resources on Energy Efficiency
YourHome - Energy Efficiency
Australian government guide to sustainable home design.
Energy.gov Saver
Free tips, calculators, and resources for home energy efficiency.
energy.gov
Energy.gov is the official website of the U.S. Department of Energy. It provides news, research, data, and practical resources on energy efficiency, clean energy technologies, policy updates, and funding opportunities for homes, buildings, and industry.
energy star.gov
Energy Star is a U.S. government program (EPA/DOE) that helps homes and businesses save energy and money through ENERGY STAR certified products, labeling, and practical energy-efficiency guidance. The site offers product finders, tools like Portfolio Manager for benchmarking, building and appliance resources, and tips to reduce energy use.
Energy Efficiency
Energy Efficiency - A book resource
nrel.gov
NREL is the U.S. Department of Energy’s national laboratory dedicated to renewable energy and energy efficiency research. The site provides research reports, datasets, and tools on energy efficiency across buildings, industry, and transportation, along with case studies, publications, and policy resources.