The process of determining energy consumption, by various techniques, of a building or facility.

The control of the quality, quantity, and temperature-humidity of the air in an interior space.

A material or structural element that inhibits air flow into and out of a building's envelope or shell. This is a continuous sheet composed of polyethylene, polypropylene, or extruded polystyrene. The sheet is wrapped around the outside of a house during ...

A mechanical device used for air circulation and to provide cooling.

The purpose for which useful energy or work is consumed.

The negative pole or electrode of an electrolytic cell, vacuum tube, etc., where electrons enter (current leaves) the system; the opposite of an anode.

A device that cuts off the flow of hot or cold air to or from a room as controlled by a thermostat.

Consist of three main layers. The top layer is near ambient and has low salt content. The bottom layer is hot, typically 160 F to 212 F (71 C to 100 C), and is very salty. The important gradient zone separates these zones. The gradient zone acts as a tran ...

A condition that results from an imbalance between the number of protons and the number of electrons in a substance.

A device that cools air by removing moisture from it.

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

A measure of the heating requirements of a building expressed in Btu per degree-day.

The maximum load that a motor is capable of supplying.

Energy systems supply individual, or small-groups, of energy loads.

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 popular term for "non-conventional" transportation fuels derived from natural gas (propane, compressed natural gas, methanol, etc.) or biomass materials (ethanol, methanol).

Heat stored above room temperature (in a solar heating system).

The amount of power a wind turbine can produce at its rated wind speed, e.g., 100 kW at 20 mph. The rated wind speed generally corresponds to the point at which the conversion efficiency is near its maximum. Because of the variability of the wind, the amo ...

The total cost of production divided by the total quantity produced.