Water that is suitable for drinking, as defined by local health officials.

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

That amount of cooling energy to be supplied (or heat and humidity removed) based on the sensible and latent loads.

A construction element used to cover the exterior of wall framing and roof trusses.

A stack of wood 4 feet by 4 feet by 8 feet.

The ratio of heat produced by a fuel for doing work to the available heat in the fuel.

The process of designing a solar system to meet a specified load given the solar resource and the nominal or rated energy output of the solar energy collection or conversion device.

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

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

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 ...

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.

Wind turbines that operate at a constant rotor revolutions per minute (RPM) and are optimized for energy capture at a given rotor diameter at a particular speed in the wind power curve.

A concrete pad that sits on gravel or crushed rock, well-compacted soil either level with the ground or above the ground.

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

A type of heating system in which heated air is blown by a fan through air channels or ducts to rooms.

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

A semiconductor (photovoltaic) material composed of variously oriented, small, individual crystals.

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 ...

Solar energy systems that collect or absorb solar energy for useful purposes. Can be used to generate high temperature heat (for electricity production and/or process heat), medium temperature heat (for process and space/water heating and electricity gene ...

A moveable or fixed heater used to heat individual rooms.