A building structural element that is built onto a building's exterior along the inner edges of all the windows, and extending from the ground to the eaves. Wingwalls help ventilate rooms that have only one exterior wall which leads to poor cross ventilat ...

A slender threadlike spike of pure crystalline material, such as silicon.

An air distribution outlet, typically located in the ceiling, which mixes conditioned air with room air.

A device that moves and/or circulates air and provides ventilation for a room or a building.

The purpose for which useful energy or work is consumed.

The weight of a material per unit of volume compared to the weight of the same volume of water.

In reference to solar energy systems, the angle that a solar collector is positioned above horizontal.

To disconnect a transmission and/or distribution line; a power line that is not carrying a current; to open a circuit.

A unit of apparent power, equal to 1,000 volt-amperes; the mathematical product of the volts and amperes in an electrical circuit.

The area between the layers of glazing (panes) of a window.

A method of preventing oxidation of the exposed metal in structures by imposing between the structure and the ground a small electrical voltage.

The conversion of the complex carbohydrates in organic material into energy.

A pump for circulating the heat transfer fluid in a hydronic heating system.

A material used to seal areas of potential air leakage into or out of a building envelope.

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

Energy available as a result of motion that varies directly in proportion to an object's mass and the square of its velocity.

The pressure corresponding to the outlet velocity of a fan; the kinetic energy per unit volume of flowing air.

That portion of supply air that is drawn from outside, plus any recirculated air that has been treated to maintain a desired air quality.

The transformation on a compound or material into one or more substances by heat alone (without oxidation). Often called destructive distillation. Pyrolysis of biomass is the thermal degradation of the material in the absence of reacting gases, and occus ...

The transparent or opaque sphere in an electric light that the electric light transmits through.