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

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

Discharging a battery to 20 percent or less of its full charge capacity.

see Air-Source Heat Pump.

The conversion of biomass into a gas, by biogasification (see above) or thermal gasification, in which hydrogen is produced from high-temperature gasifying and low-temperature pyrolysis of biomass.

The maximum heat output (in Btu per hour) released by a burner with a stable flame and satisfactory combustion.

A building architectural element (vestibule) with two airtight doors that reduces the amount of air infiltration and exfiltration when the exterior most door is opened.

The maximum load that a motor is capable of supplying.

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

The interior heat gain due to heat conduction, convection, and radiation from the exterior into the interior, and from occupants and appliances.

A structural, load-carrying building member with an open web system that supports floors and roofs utilizing wood or specific steels and is designed as a simple span member.

An interior wall made of water filled containers for absorbing and storing solar energy.

Referring to alterations in the environment due to the presence or activities of humans.

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

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

Electromagnetic radiation in the wavelength range of 4 to 400 nanometers.

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

A material that retards the movement of water vapor through a building element (walls, ceilings) and prevents insulation and structural wood from becoming damp and metals from corroding. Often applied to insulation batts or separately in the form of treat ...

A unit of electrical force equal to that amount of electromotive force that will cause a steady current of one ampere to flow through a resistance of one ohm.

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