The incremental cost to an electric power producer to generate or purchase a unit of electricity or capacity or both.

An electromagnetic ballast that disconnects a lamp's electrode heating circuit once is has started; often called "low frequency electronic" ballasts.

The water that is forced into a boiler to take the place of that which is evaporated in the generation of steam.

Abbreviation for the American Society of Heating, Refrigeration, and Air-Conditioning Engineers.

A passive or mechanical device used to ventilate an attic space, primarily to reduce heat buildup and moisture condensation.

A measure of the electrical charge of a capacitor consisting of two plates separated by an insulating material.

A device for converting one form of energy or fuel into useful energy or work.

The illuminating power of a standard candle employed as a unit for determining the illuminating quality of an illuminant.

A building construction technique used to create a continuous air retarder that uses the drywall, gaskets, and caulking. Gaskets are used rather than caulking to seal the drywall at the top and bottom. Although it is an effective energy-saving technique, ...

The air external to a building or device.

A solid fuel produced by shredding municipal solid waste (MSW). Noncombustible materials such as glass and metals are generally removed prior to making RDF. The residual material is sold as-is or compressed into pellets, bricks, or logs. RDF processing fa ...

In heating and cooling system distribution ductwork, the transformation pieces connecting horizontal round leaders to vertical rectangular stacks.

A wall usually about 3 to 4 feet high located that is placed in the attic of a home, anchored with plates between the attic floor joists and the roof joist. Sheathing can be attached to these walls to enclose an attic space.

The action of light on a biological system that results in the dissociation of a substrate, usually water, to produce hydrogen.

An air pollution control device that removes organic contaminants by oxidizing them into carbon dioxide and water through a chemical reaction using a catalysis, which is a substance that increases (or decreases) the rate of a chemical reaction without bei ...

Two metals of different coefficients of expansion welded together so that the piece will bend in one direction when heated, and in the other when cooled, and can be used to open or close electrical circuits, as in thermostats.

A system that records the consumption of electricity, gas, water, etc, and sends the data to a central data accumulation device.

A process for carrying out a reaction in which the reactants are fed in discrete and successive charges.

A type of electrical current, the direction of which is reversed at regular intervals or cycles; in the U.S. the standard is 120 reversals or 60 cycles per second; typically abbreviated as AC.

A chemical change in a substance that results from the passage of an electric current through an electrolyte. The production of commercial hydrogen by separating the elements of water, hydrogen, and oxygen, by charging the water with an electrical current ...