The total amount of electric energy loss in an electric system between the generation source and points of delivery.

Classifications of fires developed by the National Fire Protection Association.

The rate of energy transfer equivalent to one ampere under an electrical pressure of one volt. One watt equals 1/746 horsepower, or one joule per second. It is the product of Voltage and Current (amperage).

An aluminum foil fabricated insulator with backings applied to provide a series of closed air spaces with highly reflective surfaces.

The compound (working fluid) used in air conditioners, heat pumps, and refrigerators to transfer heat into or out of an interior space. This fluid boils at a very low temperature enabling it to evaporate and absorb heat.

The electrical and magnetic fields created by the presence or flow of electricity in an electrical conductor or electricity consuming appliance or motor.

A type of cooling system that uses a charging and discharging cycle with a thermal or latent heat storage subsystem.

A power source/generator that operates independently of or is not connected to an electric transmission and distribution network; used to meet a load(s) physically close to the generator.

A device that uses electronic components to regulate the voltage of fluorescent lamps.

A structure or media from which heat can be absorbed or extracted.

The change in the power available in the wind due to changes in the windspeed or velocity profile; the windpower profile is proportional to the cube of the wind speed profile.

Space cooling achieved by shading, natural (unassisted, as opposed to forced) ventilation, conduction control, radiation, and evaporation; also called passive cooling.

A sinusoidal quantity having a frequency that is an integral multiple of the frequency of a periodic quantity to which it is related.

A type of solar thermal collector in which a heat transfer fluid drips out of header pipe at the top of the collector, runs down the collector absorber and into a tray at the bottom where it drains to a storage tank.

The fine liquid or solid particles contained in combustion gases. The quantity and size of particulates emitted by cars, power and industrial plants, wood stoves, etc are regulated by the U.S. Environmental Protection Agency.

A fluid used to absorb and transfer heat energy.

The cost of producing one additional unit of a product.

The heat-transfer (exchanger) component of a heatpump, located outdoors, from which heat is collected in the heating mode, or expelled in the cooling mode.

Fuels that cannot be easily made or "renewed," such as oil, natural gas, and coal.

A device that transfers heat by the continuous evaporation and condensation of an internal fluid.