The water content of a substance (a solid fuel) as measured under specified conditions being the: Dry Basis, which equals the weight of the wet sample minus the weight of a (bone) dry sample divided by the weight of the dry sample times 100 (to get percen ...

A general term for the visible and near visible (ultraviolet and near-infrared) electromagnetic radiation that is emitted by the sun. It has a spectral, or wavelength, distribution that corresponds to different energy levels; short wavelength radiation ha ...

A measure of the unavailable or unusable energy in a system; energy that cannot be converted to another form.

A high R-value insulation product usually made from urethane that can be injected into wall cavities, or sprayed onto roofs or floors, where it expands and sets quickly.

The interior area of a building, calculated in square feet or meters.

Freshly cut, unseasoned, wood.

Thermal energy that is used in agricultural and industrial operations.

A chemical used as a preservative and in bonding agents. It is found in household products such as plywood, furniture, carpets, and some types of foam insulation. It is also a by-product of combustion and is a strong-smelling, colorless gas that is an eye ...

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

A popular term for energy produced from renewable energy resources.

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

A means of billing electric power consumers to pay for the costs of demand side management/energy conservation measures and programs. (See also Benefits Charge.)

That portion of an electricity supply system used to deliver electricity from points on the transmission system to consumers.

The net south-facing glazing area projected on a vertical plane. Also, the solid area covered at any instant by a wind turbine's blades from the perspective of the direction of the windstream (as opposed to the swept area).

A tax credit granted for specific types of investments.

A method used to estimate building heating loads by assuming that heat loss and gain is proportional to the equivalent heat-loss coefficient for the building envelope.

A coating applied to the surface of the glazing of a window to reduce heat transfer through the window.

The sum of the ratings of the electricity consuming apparatus connected to a generating system.

A solid that contains pores; normally, it refers to interconnected pores that can transmit the flow of fluids. (The term refers to the aquifer geology when discussing sites for CAES.)

The unoccupied, and usually unfinished and unconditioned space between the floor, foundation walls, and the slab or ground of a building.