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LEED: Energy&Atmosph

key terms

QuestionAnswer
British Thermal Unit (Btu) amount of heat required to raise the temperature of one pound of liquid water from 60° to 61° F. This standard measure of energy is used to describe the energy content of fuels and compare energy use.
Building Envelope exterior surface of a building --- the walls, windows, roof, & floor; also referred to as the building shell.
Chiller device that removes heat from a liquid typically as part of a refrigeration system used to cool & dehumidify buildings.
Compact Fluorescent Lamp (CFL) small fluorescent lamp, used as a more efficient alternative to incandescent lighting; also called a PL, twin-tube, or biax lamp. (EPA)
Energy-Efficient Products and Systems building components and appliances that use less energy to perform as well as or better than standard products.
Energy or Greenhouse Gas Emissions per Capita a community’s total greenhouse gas emissions divided by the total number of residents.
Energy Management System control system capable of monitoring environmental & system loads and adjusting the HVAC operations accordingly in order to conserve energy while maintaining comfort. (EPA)
ENERGY STAR Rating measure of a building’s energy performance compared with that of similar buildings. A score of 50 represents average building performance.
Energy Use Intensity energy consumption divided by the number of square feet in a building, often expressing as British thermal units (Btus) per square foot or as kilowatt-hours of electricity per square foot per year (kWh/sf/yr).
Fossil Fuel energy derived from ancient organic remains, such as peat, coal, crude oil, and natural gas. (EPA)
HVAC systems equipment, distribution systems, and terminals that provide the processes of heating, ventilating, or air-conditioning. (ASHRAE Standard 90.1 – 2007)
Lighting Power Density the installed lighting power per unit area.
Measures of Energy Use typical primary measures of energy consumption associated with buildings include kilowatt-hours of electricity, therms of natural gas, & gallons of liquid fuel.
Nonrenewable not capable of being replaced; permanently depleted once used. Examples of nonrenewable energy sources are oil and natural gas; nonrenewable natural resources include metallic ores.
Performance Relative to Benchmark a comparison of a building system’s performance with a standard, such as ENERGY STAR portfolio manager.
Performance Relative to Code comparison of a building system’s performance with a baseline that is equivalent to minimal compliance with an applicable energy code, such as ASHRAE Standard 90 or California’s Title 24.
Photovoltaic (PV) Energy electricity from photovoltaic cells that convert the energy in sunlight into electricity.
Renewable Energy resources that are not depleted by use. Examples include energy from sun, wind and low-impact hydropower, geothermal energy, and wave/tidal systems.
Renewable Energy Certificate (REC) a tradable commodity representing proof that a unit of electricity was generated from a renewable energy resources; typically sold separately from the electricity and allows the purchase of green power by a user of conventionally generated electricity.
Created by: kbtwomey
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