Legal documents that regulate construction to protect the health, safety, and welfare of people. Codes establish minimum standards but do not guarantee efficiency or quality.

Turning off or disconnecting loads to limit peak demand.

A popular term used for an evaporative cooling device.

A stationary or rotating vent used to ventilate attics or cathedral ceilings; usually made of galvanized steel, or polypropylene.

The highest possible pressure in a fuel-air mixture before spontaneous ignition occurs.

A term used to describe a technologically advanced window system that contains glazing that can change or switch its optical qualities when a low voltage electrical signal is applied to it, or in response to changes in heat or light.

The ability to dispatch power.

An electronic device that allows current to flow in one direction only.

Solar radiation reflected from the ground onto a solar collector.

The vacancy where an electron would normally exist in a solid; behaves like a positively charged particle.

Amorphous silicon with a small amount of incorporated hydrogen. The hydrogen neutralizes dangling bonds in the amorphous silicon, allowing charge carriers to flow more freely.

The number of revolutions that the motor turns in a given time period (i.e. revolutions per minute, rpm).

A curve that displays load values on the horizontal axis in descending order of magnitude against the percent of time (on the vertical axis) that the load values are exceeded.

The demand of a consumer of electricity at the time of a power supplier's peak system demand.

A type of furnace in which fuel is burned and the heat is used to produce steam.

An insulation product made of a fibrous material or plastic foams, pressed or extruded into board-like forms. It provides thermal and acoustical insulation strength with low weight, and coverage with few heat loss paths.

The planting, cultivation, and harvesting of a single species of crop in a specified area.

A vehicle with an engine capable of operating on two different types of fuels.

Air that is returned to a heating or cooling appliance from a heated or cooled space.

The local climate of specific place or habitat, as influenced by landscape features.