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Scout Building Energy Modeling Software 
DOE's Building Technologies Program works in partnership with states, industry, and manufacturers to improve the energy efficiency of our nation's buildings. Through innovative new technologies and systems-engineered building practices we are transforming how we design, build, and operate the approximately 15 million new buildings projected to be constructed by 2015.
50001 Ready Navigator
The 50001 Ready Navigator is an online application that provides step-by-step guidance for implementing and maintaining an energy management system in conformance with the ISO 50001 Energy Management System Standard.
Lawrence Berkeley Lab Energy Analysis Department
The Energy Analysis Department studies energy use in the United States and abroad. Data compilation and analysis-as well as computer modeling of energy scenarios-are applied to the residential, commercial, industrial, and transportation sectors of the economy.
Lawrence Berkeley Lab Environmental Energy Technologies Division 
The mission of the Environmental Energy Technologies Division is to perform research and development leading to better energy technologies and reduction of adverse energy-related environmental impacts.
Lawrence Berkeley Lab Building Technologies Department 
The Building Technologies Department develops window, lighting and glazing technologies that save energy and maximize visual and thermal comfort of building occupants. The Department also develops software that allows architects and building engineers to design or retrofit buildings for maximum energy efficiency and occupant comfort.
California Energy Efficiency Standards for Residential and Nonresidential Buildings
From the California Energy Commission - The Energy Efficiency Standards for Residential and Nonresidential Buildings were established in 1978 in response to a legislative mandate to reduce California's energy consumption. The standards are updated periodically to allow consideration and possible incorporation of new energy efficiency technologies and methods. California's building efficiency standards (along with those for energy efficient appliances) have saved more than $36 billion in electricity and natural gas costs since 1978. It is estimated the standards will save an additional $43 billion by 2013. The current (2001) Standards and the 2005 Standards may be downloaded from this website.
CANMET Energy Technology Centre
The CANMET Energy Technology Centre (CETC) is one of Canada's premier organizations in the field of energy, science and technology. As a key research arm of Natural Resources Canada (NRCan) and as part of NRCan's Energy Sector, CETC works with private and other public sector partners to develop and deploy leading-edge energy products and processes for virtually all sectors of the Canadian economy.
California Institute for Energy Efficiency (CIEE) 
An innovative University of California partnership of energy agencies, utilities, building industry, non-profits, and research entities designed to advance energy efficiency science and technology for the benefit of California and other energy consumers and the environment. CIEE is a branch of the University of California Energy Institute.
Indoor Environmental Quality Research Roadmap 2012–2030: Energy-Related Priorities 
This report is an update and expansion of the 2002 report, Energy –Related Indoor Environmental Quality Research: A Priority Agenda. . It serves two purposes: (1) to summarize lessons learned since 2002, when the first indoor environmental quality research roadmap was completed, and (2) to identify indoor environmental quality research needs specifically related to the State’s policy to achieve net zero energy in new building construction and retrofitting of more existing buildings during the next two decades. The report describes future scenarios and emerging trends affecting energy efficiency and indoor environmental quality, as well as indoor environmental quality linkages to energy efficiency.
DOE-2 is a widely used and accepted freeware building energy analysis program that can predict the energy use and cost for all types of buildings.
Building Envelope Research at Oak Ridge National Lab
The Building Envelopes Program at Oak Ridge National Laboratory (ORNL) is a program within the Buildings Technology Center (BTC), the premier U.S. research facility devoted to developing technologies that improve the energy efficiency and environmental compatibility of residential and commercial buildings.
Building Energy Tools Directory 
DOE developed this directory because many Office of Building Technology, State and Community Program (BTS) programs develop software tools to help researchers, designers, architects, engineers, builders, code officials, and others involved in the building life-cycle to evaluate and rank potential energy-efficiency technologies and renewable energy strategies in new or existing buildings.
ASEAM (A Simplified Energy Analysis Method), Version 5.0 
A public domain computer program to calculate the energy consumption of proposed and existing buildings. ASEAM 5.0 uses the modified bin methodology to calculate energy consumed by the building's heating, cooling, lighting, (HVAC) and other energy consumption of buildings, for both new construction and retrofit applications.
BLDG-SIM mailing list
BLDG-SIM is a mailing list for users of building energy simulation programs. Building energy simulation programs allow users to estimate the energy use and operating cost of residential, commercial and other types of buildings. This allows engineers, architects and others in the building design trade to compare alternative designs and select the design that is cost justified.
American Council on Renewable Energy 
The American Council On Renewable Energy, a 501(c)(3), non-profit organization in Washington, D.C., is focused on accelerating the adoption of renewable energy technologies into the mainstream of American society through work in convening, information publishing and communications.
American Solar Energy Society 
The American Solar Energy Society (ASES) is the United States section of the International Solar Energy Society. ASES is a nonprofit, 501(c)3 organization dedicated to the development and adoption of renewable energy in all its forms.
Alliance to Save Energy
The Alliance to Save Energy promotes energy efficiency worldwide to achieve a healthier economy, a cleaner environment and greater energy security.
Affordable Comfort
ACI's mission is to improve the way homes perform in terms of health, safety, durability and the reduction of energy use/cost.
RETScreen International Clean Energy Decision Support Centre 
The RETScreen International Clean Energy Decision Support Centre seeks to build the capacity of planners, decision-makers and industry to implement renewable energy and energy efficiency projects. This objective is achieved by: developing decision-making tools (e.g. RETScreen Software) that reduce the cost of pre-feasibility studies; disseminating knowledge to help people make better decisions; and by training people to better analyse the technical and financial viability of possible projects.
Interactive REcalculator
The REcalculator allows you to include the economic values of various externalities - air emissions, system integration, security of supply, employment - in your calculations. It provides the basis for developing recommendations for international and national policies that could level the playing field for renewables by including externalities in energy prices.
Consumer Guide to Home Energy Savings, 9th Edition
Well-organized and highly readable, the Consumer Guide to Home Energy Savings begins with an overview of the inter-relationships between energy use, economics and the environment. Chapters focus on specific areas in the home, such as electronics, lighting, heating, cooling, ventilation, kitchen and laundry, and provide helpful explanations for each,
Nuclear Information and Resource Service & World Information Service on Energy 
NIRS/WISE is the information and networking center for people and organizations concerned about nuclear power, radioactive waste, radiation, and sustainable energy issues.
DOE EnergyPlus Modeling Software 
EnergyPlus is used by architects and engineers to design more efficient buildings, by researchers to investigate new building and system designs, and by policymakers to develop energy codes and standards. The advanced physics calculations within EnergyPlus allows it to model a wide range of residential and commercial buildings and HVAC system types, including passive building designs and low-energy systems.
Building Energy Asset Score
The Department of Energy Building Energy Asset Score (Asset Score) is a national standardized tool for evaluating the physical and structural energy efficiency of commercial and multifamily residential buildings. The scoring tool will store user-provided data and generate an asset score and system evaluation for your building envelope and mechanical and electrical systems. The tool will also identify cost-effective upgrade opportunities and help you gain insight into the energy efficiency potential of your building.
Energy Vanguard 
Energy Vanguard is your source for training, consulting, design (HVAC), and HERS provider services. Whether you found us through your role as one who lives in homes or one who works on homes.
Let's Go Solar 
A comprehensive resource that answers these questions by providing simple, actionable information to help consumers feel confident finding the best renewable energy solutions for their homes.