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In the United States, the increase of low-flush toilets in response to the Energy Policy Act of 1992 and other water conservation legislation can be attributed to the saving of 7 billion gallons of water a day-enough water to satiate the water needs of 7 cities the size of New York City. [6]
Sustainable construction aims to reduce the negative health and environmental impacts caused by the construction process and by the operation and use of buildings and the built environment. [1] It can be seen as the construction industry's contribution to more sustainable development. Precise definitions vary from place to place, and are ...
As of March 2010 more than 550 ESPC projects worth $3.6 billion were awarded to 25 Federal Agencies and organizations in 49 states and the District of Columbia (D.C.). .). These projects saved an estimated 30.2 trillion BTU annually, equivalent to the energy consumed by 318,300, and $11 billion in energy costs, $9.6 billion goes to fund energy efficiency projects and $1.4 billion is reduced ...
There are two types of solar water systems: active and passive. An active solar collector system can produce about 80 to 100 gallons of hot water per day. A passive system will have a lower capacity. [22] Active solar water system's efficiency is 35-80% while a passive system is 30-50%, making active solar systems more powerful. [23]
A deep energy retrofit (DER) is an energy conservation project in an existing building that leads to an overall improvement in building performance.While there is no exact definition for a deep energy retrofit, it can be characterized as a whole-building analysis and construction process that aims to reduce on-site energy use by 50% or more using existing technologies, materials and ...
Green building also refers to saving resources to the maximum extent, including energy saving, land saving, water saving, material saving, etc., during the whole life cycle of the building, protecting the environment and reducing pollution, providing people with healthy, comfortable and efficient use of space, and being in harmony with nature.
An energy audit is an inspection and analysis of energy use and flows for energy conservation in a structure, process, or system intending to reduce energy input without negatively affecting output. Energy audits can determine specific opportunities for energy conservation and efficiency measures as well as determine cost-effective strategies ...
The intent of these energy codes is to moderate and reduce energy use and emissions throughout the lifetime of a building. [2] Energy code provisions may include various aspects of building design and construction, such as: HVAC systems, building envelope, electrical, and lighting systems. [3] There are building energy codes for both commercial ...