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

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

Any wholly or partially enclosed space in which combustion takes place.

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

Solar radiation reflected from the ground onto a solar collector.

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

A solar collector in which the absorber is contained in a sealed glass tube, thereby providing for relatively high temperature heat gain.

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.

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

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.

A chemical element (impurity) added in small amounts to an otherwise pure semiconductor material to modify the electrical properties of the material. An n-dopant introduces more electrons. A p-dopant creates electron vacancies (holes).

Air that provides the necessary oxygen for complete, clean combustion and maximum heating value.

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

A gasifier in which the feedstock (fuel) is suspended by the movement of gas to move it through the gasifier.

Turning off or disconnecting loads to limit peak demand.

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.

Fabricated as a single structure.

A type of window having two layers (panes or glazing) of glass separated by an air space. Each layer of glass and surrounding air space reradiates and traps some of the heat that passes through thereby increasing the windows resistance to heat loss (R-val ...

A popular term used to describe the heating effect due to the trapping of long wave (length) radiation by greenhouse gases produced from natural and human sources.

The analysis of atmospheric conditions, particularly moisture in the air.