The unit of illuminance equivalent to 1lumen per square meter.

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

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

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

A thin sheet of material (metal) of a heat exchanger that conducts heat to a fluid.

A battery-powered electrically driven vehicle.

The physically connected generation, transmission, and distribution facilities and components operated as a unit.

The transfer of heat through a material by the transfer of kinetic energy from particle to particle; the flow of heat between two materials of different temperatures that are in direct physical contact.

A unit of electrical measurement equal to the product of a volt and an ampere.

The total diffuse and direct insolation on a horizontal surface, averaged over a specified period of time.

The visible portion of the electromagnetic spectrum with wavelengths from 0.4 to 0.76 microns

A colorless, pungent, gas (NH3) that is extremely soluble in water, may be used as a refrigerant; a fixed nitrogen form suitable as fertilizer.

A substance(s) or pollutant emitted as a result of a process.

The heat absorbed or released when a substance undergoes a change in temperature.

Ventilation that is created by the differences in the distribution of air pressures around a building. Air moves from areas of high pressure to areas of low pressure with gravity and wind pressure affecting the airflow. The placement and control of doors ...

A standard unit of electrical power equal to one thousand watts, or to the energy consumption at a rate of 1000 Joules per second.

A wood or gas burning heating appliance that fits into the opening or protrudes on to the hearth of a conventional fireplace.

The amount of visible light that passes through the glazing material of a window, expressed as a percentage.

A type of heat pump that uses sealed horizontal or vertical pipes, buried in the ground, as heat exchangers through which a fluid is circulated to transfer heat.

The ability of a building construction assembly (partition, wall, floor, etc.) to resist the passage of fire. The rating is expressed in hours.