Energy conservation refers to reducing energy through using less of an energy service. Energy conservation differs from efficient energy use, which refers to using less energy for a constant service. For example, driving less is an example of energy conservation. Driving the same amount with a higher mileage vehicle is an example of energy efficiency. Energy conservation and efficiency are both energy reduction techniques.
Even though energy conservation reduces energy services, it can result in increased financial capital, environmental quality, national security, and personal financial security. It is at the top of the sustainable energy hierarchy.
Energy taxes 
Some countries employ energy or carbon taxes to motivate energy users to reduce their consumption. As detailed in the book, Green Illusions, carbon taxes can allow consumption to shift to nuclear power and other alternatives that carry a different set of environmental side effects and limitations. Meanwhile, taxes on all energy consumption stand to reduce energy use across the board, while reducing a broader array of environmental consequences arising from energy production. The State of California employs a tiered energy tax whereby every consumer receives a baseline energy allowance that carries a low tax. As usage increases above that baseline, the tax increases dramatically. Such programs aim to protect poorer households while creating a larger tax burden for high energy consumers.
Building Design 
One of the primary ways to improve energy conservation in buildings is to use an energy audit. An energy audit is an inspection and analysis of energy use and flows for energy conservation in a building, process or system to reduce the amount of energy input into the system without negatively affecting the output(s). This is normally accomplished by trained professionals and can be part of some of the national programs discussed above. In addition, recent development of smartphone apps enable homeowners to complete relativily sophisticated energy audits themselves.
Building technologies and smart meters can allow energy users, business and residential, to see graphically the impact their energy use can have in their workplace or homes. Advanced real-time energy metering is able to help people save energy by their actions.
In passive solar building design, windows, walls, and floors are made to collect, store, and distribute solar energy in the form of heat in the winter and reject solar heat in the summer. This is called passive solar design or climatic design because, unlike active solar heating systems, it doesn't involve the use of mechanical and electrical devices.
The key to designing a passive solar building is to best take advantage of the local climate. Elements to be considered include window placement and glazing type, thermal insulation, thermal mass, and shading. Passive solar design techniques can be applied most easily to new buildings, but existing buildings can be retrofitted.
In the United States, suburban infrastructure evolved during an age of relatively easy access to fossil fuels, which has led to transportation-dependent systems of living. Zoning reforms that allow greater urban density as well as designs for walking and bicycling can greatly reduce energy consumed for transportation. The use of telecommuting by major corporations is a significant opportunity to conserve energy, as many Americans now work in service jobs that enable them to work from home instead of commuting to work each day.
Consumer products 
Consumers are often poorly informed of the savings of energy efficient products. The research one must put into conserving energy often is too time consuming and costly when there are cheaper products and technology available using today's fossil fuels. Some governments and NGOs are attempting to reduce this complexity with ecolabels that make differences in energy efficiency easy to research while shopping.
To provide the kind of information and support people need to invest money, time and effort in energy conservation, it is important to understand and link to people's topical concerns. For instance, some retailers argue that bright lighting stimulates purchasing. However, health studies have demonstrated that headache, stress, blood pressure, fatigue and worker error all generally increase with the common over-illumination present in many workplace and retail settings. It has been shown that natural daylighting increases productivity levels of workers, while reducing energy consumption.
Energy conservation by country 
European Union 
At the end of 2006, the European Union-EU pledged to cut its annual consumption of primary energy by 20% by 2020. The 'European Union Energy Efficiency Action Plan' is long awaited. As part of the EU's SAVE Programme, aimed at promoting energy efficiency and encouraging energy-saving behaviour, the Boiler Efficiency Directive specifies minimum levels of efficiency for boilers fired with liquid or gaseous fuels. The European Commission is funding large-scale research projects to learn about success factors for effective energy conservation programmes.
United Kingdom 
Energy conservation in the United Kingdom has been receiving increased attention over recent years. Key factors behind this are the Government's commitment to reducing carbon emissions, the projected 'energy gap' in UK electricity generation, and the increasing reliance on imports to meet national energy needs. Domestic housing and road transport are currently the two biggest problem areas.
Responsibility for energy conservation falls between three Government departments although is led by the Department for Energy and Climate Change (DECC). The Department for Communities and Local Government (CLG) is still responsible for energy standards in buildings, and the Department for Environment, Food and Rural Affairs (Defra) retains a residual interest in energy insofar as it leads to emissions of CO2, the main greenhouse gas. The Department for Transport retains many responsibilities for energy conservation in transport. At an operational level, there are two main non-departmental governmental bodies ("quangoes") - the Energy Saving Trust, working mainly in the domestic sector with some interest in transport, and the Carbon Trust, working with industry and innovative energy technologies. In addition there are many independent NGOs working in the sector such as the Centre for Sustainable Energy in Bristol or the National Energy Foundation in Milton Keynes, and directly helping consumers make informed choices on energy efficiency sust-it
Petroleum Conservation Research Association (PCRA) www.pcra.org is an Indian government body created in 1977 and engaged in promoting energy efficiency and conservation in every walk of life. In the recent past PCRA has done mass media campaigns in television, radio & print media. An impact assessment survey by a third party revealed that due to these mega campaigns by PCRA, overall awareness level have gone up leading to saving of fossil fuels worth crores of rupees besides reducing pollution.
Bureau of Energy Efficiency is an Indian governmental organization created in 2001 responsible for promoting energy efficiency and conservation.
In Iran the Iranian Fuel Conservation Company is responsible for promoting energy efficiency and conservation for Fossil fuels. Ahmadinejad's administration launched the 'Tergeted Subsidies' initiative primarily to reduce the energy intensity of the nation's economy.
In Lebanon and since 2002 The Lebanese Center for Energy Conservation (LCEC) has been promoting the development of efficient and rational uses of energy and the use of renewable energy at the consumer level. It was created as a project financed by the Global Environment Facility (GEF) and the Ministry of Energy Water (MEW) under the management of the United Nations Development Programme (UNDP) and gradually established itself as an independent technical national center although it continues to be supported by the United Nations Development Programme (UNDP) as indicated in the Memorandum of Understanding (MoU) signed between MEW and UNDP in June 18, 2007.
New Zealand 
Sri Lanka 
Sri Lanka currently consumes fossil fuels, hydro power, wind power, solar power and dendro power for their day to day power generation. The Sri Lanka Sustainable Energy Authority is playing a major role regarding energy management and energy conservation. Today, most of the industries are requested to reduce their energy consumption by using renewable energy sources and optimizing their energy usage.
Asia Pacific 
Despite the vital role energy efficiency is envisaged to play in cost-effectively cutting energy demand, only a small part of its economic potential is exploited in the Asia Pacific. Governments have implemented a range of subsidies such as cash grants, cheap credit, tax exemptions, and co-financing with public-sector funds to encourage a range of energy-efficiency initiatives across several sectors. Governments in the Asia-Pacific region have implemented a range of information provision and labeling programs for buildings, appliances, and the transportation and industrial sectors. Information programs can simply provide data, such as fuel-economy labels, or actively seek to encourage behavioral changes, such as Japan’s Cool Biz program that encourages setting air conditioners at 28-degrees Celsius and allowing employees to dress casually in the summer.More in Pacific Energy Summit.
United States 
The United States is currently the second largest single consumer of energy, following China. The U.S. Department of Energy categorizes national energy use in four broad sectors: transportation, residential, commercial, and industrial.
Energy usage in transportation and residential sectors, about half of U.S. energy consumption, is largely controlled by individual consumers. Commercial and industrial energy expenditures are determined by businesses entities and other facility managers. National energy policy has a significant effect on energy usage across all four sectors.
See also 
- Annual fuel utilization efficiency (AFUE)
- Domestic energy consumption
- Energy crisis
- Energy hierarchy
- Energy monitoring and targeting
- Energy recovery
- Green building
- Green computing
- Heat Pump
- High temperature insulation wool
- Jevons paradox
- Khazzoom–Brookes postulate
- List of energy storage projects
- List of low-energy techniques
- Low Carbon Communities
- Low energy building
- Low-energy vehicle
- Marine fuel management
- Minimum Efficiency Performance Standards
- One Watt Initiative
- Passive house
- Smart grid
- Renewable heat
- Thermal efficiency
- Universal Metering Interface (UMI)
- Window film
- Youth Energy Summit
- Zero energy building
- Gary Steffy, Architectural Lighting Design, John Wiley and Sons (2001) ISBN 0-471-38638-3
- Lumina Technologies, Analysis of energy consumption in a San Francisco Bay Area research office complex, for (confidential) owner, Santa Rosa, Ca. May 17, 1996
- GSA paves way for IT-based buildings 
- The official homepage for the European Intelligent Metering project. 
- "Unintended Consequences of Green Technologies". University of California, Berkeley. Retrieved 26 December 2012.
- Zehner, Ozzie (2012). Green Illusions. Lincoln and London: University of Nebraska Press. pp. 179–182.
- Patrick Leslie, Joshua Pearce, Rob Harrap, Sylvie Daniel, “The application of smartphone technology to economic and environmental analysis of building energy conservation strategies”, International Journal of Sustainable Energy 31(5), pp. 295-311 (2012). open access
- July 2009 European Commission's Directorate-General for Energy and Transport initiative, "Energy Savings from Intelligent Metering and Behavioural Change (INTELLIGENT METERING) http://www.managenergy.net/products/R1951.htm", 2009
- Best Buy Optimas Award Winner for 2007
- The Difficulties of Energy Efficiency. "The Elusive Negawatt ", 2008
- Breukers, Heiskanen, et al. (2009). Interaction schemes for successful demand-side management. Deliverable 5 of the CHANGING BEHAVIOUR project. Funded by the EC (#213217)
- Toolkit for managers of energy conservation projects: How to learn about people's topical concerns
- Scott Davis, Dana K. Mirick, Richard G. Stevens (2001). "Night Shift Work, Light at Night, and Risk of Breast Cancer". Journal of the National Cancer Institute 93 (20): 1557–1562. doi:10.1093/jnci/93.20.1557. PMID 11604479.
- Bain, A (1997). "The Hindenburg Disaster: A Compelling Theory of Probable Cause and Effect". Procs. NatL Hydr. Assn. 8th Ann. Hydrogen Meeting, Alexandria, Va., March 11–13,: 125–128.
- Lumina Technologies Inc., Santa Rosa, Ca., Survey of 156 California commercial buildings energy use, August, 1996
- "Energy: What do we want to achieve ? - European commission". Ec.europa.eu. Retrieved 2010-07-29.
- For an Energy-Efficient Millennium: SAVE 2000, Directorate-General for Energy
- Council Directive 92/42/EEC of 21 May 1992 on efficiency requirements for new hot-water boilers fired with liquid or gaseous fuels
- see for example CHANGING BEHAVIOUR
- US Dept. of Energy, "Annual Energy Report" (July 2006), Energy Flow diagram
- Robb, Drew (2007-06-02). "GSA paves way for IT-based buildings - Government Computer News". Gcn.com. Retrieved 2010-07-29.
|Wikibooks has a book on the topic of: How to reduce home energy usage|
- Web site(Iranian Fuel Conservation Company)
- David Suzuki Foundation: Energy Conservation and Efficiency
- Energy saving advice and grants for UK consumers
- Energy efficiency and renewable energy at the U.S. Department of Energy
- EnergyStar - for commercial buildings and plants
- The State of Energy Efficiency Policies in Middle East via Carboun
- Ulrich Hottelet: Want to Save the Earth? Pick a Clothesline, Atlantic Times, November 2007