A complete lighting unit consisting of a lamp(s), housing, and connection to the power circuit.

The physical measure of the subjective sensation of brightness; measured in lumens.

The unit of illuminance equivalent to 1lumen per square meter.

Molten or partially molten rock at temperatures ranging from 1,260 F to 2,880 F (700 C to 1600 C). Some magma bodies are believed to exist at drillable depths within the Earth's crust, although practical technologies for harnessing magma energy have not b ...

A type of florescent light ballast that uses a magnetic core to regulate the voltage of a florescent lamp.

Air brought into a building from outside to replace exhaust air.

The standard method for calculating residential cooling loads developed by the Air-Conditioning and Refrigeration Institute (ARI) and the Air Conditioning Contractors of America (ACCA) based largely on the American Society of Heating, Refrigeration, and A ...

The cost of producing one additional unit of a product.

Material such as brick, rock, or stone.

A type of heating appliance similar to a fireplace, but much more efficient and clean burning. They are made of masonry and have long channels through which combustion gases give up their heat to the heavy mass of the stove, which releases the heat slowly ...

A type of municipal solid waste (MSW) incineration facility in which MSW is burned with only minor presorting to remove oversize, hazardous, or explosive materials. Mass burn facilities can be large, with capacities of 3000 tons (2.7 million kg) of MSW pe ...

An abbreviation for one thousand cubic feet of natural gas with a heat content of 1,000,000 Btus, or 10 therms.

The average power output of a wind energy conversion system at a given mean wind speed based on a Raleigh frequency distribution.

The arithmetic wind speed over a specified time period and height above the ground (the majority of U.S. National Weather Service anemometers are at 20 feet (6.1 meters).

Those elements of building used to control the interior climate.

The wind speed with 50 percent probability of occurring.

Fuel gas with a heating value of between 200 and 300 Btu per cubic foot.

For valves and fittings, implies that they are suitable for working pressures between 125 to 175 pounds per square inch.

One thousand kilowatts, or 1 million watts; standard measure of electric power plant generating capacity.

One thousand kilowatt-hours or 1 million watt-hours.