A method of growing large size, high quality semiconductor crystal by slowly lifting a seed crystal from a molten bath of the material under careful cooling conditions.

A type of radiant heating system where the radiator is located along an exterior wall where the wall meets the floor.

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

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

The air external to a building or device.

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

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

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 ...

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.

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

The product of 1 hour, and usually the number of degrees Fahrenheit the hourly mean temperature is above a base point (usually 65 degrees Fahrenheit); used in roughly estimating or measuring the cooling load in cases where processes heat, heat from buildi ...

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.

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 ...

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

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.

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

The temperature at which a material ignites.

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.