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

Microorganisms that live in oxygen deprived environments.

The space-conditioning load of a building.

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.

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

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

The process of removing a power plant, apparatus, equipment, building, or facility from operation.

An opening; in solar collectors, the area through which solar radiation is admitted and directed to the absorber.

The amount of heat energy needed to raise the temperature of a given mass of a substance by one degree Celsius. The heat required to raise the temperature of 1 kg of water by 1 degree Celsius is 4186 Joules.

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

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

A hard, dense type of coal, that is hard to break, clean to handle, difficult to ignite, and that burns with an intense flame and with the virtual absence of smoke because it contains a high percentage of fixed carbon and a low percentage of volatile matt ...

A type of hydroturbine in which the entire generator is mounted inside the water passageway as an integral unit with the turbine. These installations can offer significant reductions in the size of the powerhouse.

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.

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

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

A category of electric power producer established under the Public Utility Regulatory Policy Act (PURPA) of 1978, that includes small-power producers (SPP) who use renewable sources of energy such as biomass, geothermal, hydroelectricity, solar (thermal a ...

see Air-Source Heat Pump.

A type of combustion heating appliance in which the combustion gases are vented to the outside, either with a fan (forced) or by natural convection.

The angular position of the sun at solar noon with respect to the plane of the equator.