The monochromatic irradiance of a surface per unit bandwidth at a particular wavelength, usually expressed in Watts per square meter-nanometer bandwidth.

A deposition process whereby heat is used to break molecules into elemental sources that are then spray deposited on a substrate.

A window located on the roof of a structure to provide interior building spaces with natural daylight, warmth, and ventilation.

A national trade association of solar energy equipment manufacturers, retailers, suppliers, installers, and consultants.

A water and energy conserving device that limits the amount of water that a faucet or showerhead can deliver.

A plot of a wind energy conversion device's power output versus wind speed.

Usually refers to ethanol to 160 to 200 proof.

A solar heating system that uses a liquid as the heat transfer fluid.

Energy that is capable or available for doing work; the time rate at which work is performed, measured in horsepower, Watts, or Btu per hour. Electric power is the product of electric current and electromotive force.

A type of water heater in which heated water is stored within the tank. Hot water is released from the top of the tank when a hot water faucet is turned. This water is replaced with cold water that flows into the tank and down to just above the bottom pla ...

A chemical element, of atomic number 14, that is semi-metallic, and an excellent semiconductor material used in solar photovoltaic devices; commonly found in sand.

A value used to estimate interior air cooling requirements (load) calculated as the number of degrees per day (over a specified period) that the daily average temperature is above 65 degrees Fahrenheit (or some other, specified base temperature). The dail ...

The amount of heat required to raise a unit mass of a substance through one degree, expressed as a ratio of the amount of heat required to raise an equal mass of water through the same range.

A law to protect consumers and investors. It placed geographic restrictions on mergers and limitations on diversification into non-utility lines of business and takeovers of electric and gas utilities, and also established regulated monopoly markets or se ...

One layer of glass in a window frame. It has very little insulating value (R-1) and provides only a thin barrier to the outside and can account for considerable heat loss and gain.

The fossil fuels: coal, oil, and natural gas.

The percentage of a building's seasonal energy requirements that can be met by a solar energy device(s) or system(s).

A type of structural, insulated product with foam insulation contained between two facings of drywall, or structural wood composition boards such as plywood, waferboard, and oriented strand board.

The total capacity of electrical generation devices in a power station or system.

A unit for the quantity of electricity transported in 1 second by a current of 1 ampere.