A building energy auditing technique used to determine and/or locate air leaks in a building shell or envelope.

The maximum possible voltage across a photovoltaic cell; the voltage across the cell in sunlight when no current is flowing.

The prescribed level of pollutants allowed in outside or indoor air as established by legislation.

A WECS that is used to grind grain, and that typically has a high-solidity rotor; commonly used to refer to all types of WECS.

The rate of heat production by a steady current in any part of an electrical circuit that is proportional to the resistance and to the square of the current, or, the internal energy of an ideal gas depends only on its temperature.

A large number of thermocouples connected in series.

A charge for the maximum rate at which energy is used during peak hours of a billing period. That part of a utility service charged for on the basis of the possible demand as distinguished from the energy actually consumed.

The process of transmitting electricity over one or more separately owned electric transmission and distribution systems. (See Wholesale and Retail Wheeling.)

A drag-type wind machine that can react to wind from any direction.

Gasoline fuel additives such as ethanol, ETBE, or MTBE that add extra oxygen to gasoline to reduce carbon monoxide pollution produced by vehicles.

Waste material from households and businesses in a community that is not regulated as hazardous.

A type of insulation, composed of small diameter pink, yellow, or white glass fibers, formed into blankets or batts, or used in loose-fill and blown-in applications.

A material used to seal gaps around windows and exterior doors.

Draft that is caused by temperature differences in the air.

The first law states that energy can not be created or destroyed; the second law states that when a free exchange of heat occurs between two materials, the heat always moves from the warmer to the cooler material.

A unit of rate of water evaporation equal to the evaporation per hour of 34.5 pounds of water at a temperature of 212 degrees Fahrenheit into steam at 212 degrees F.

A type of wind turbine in which the axis of rotation is perpendicular to the wind stream and the ground.

A device for converting a solid fuel to a gaseous fuel.

The approximate energy producing capacity of a power plant, under specified conditions, usually during periods of highest load.

An air conditioner consisting of one or more assemblies that move, clean, cool, and dehumidify air.