In reference to solid biomass fuels, such as wood, having zero moisture content.

A material or structural element that inhibits air flow into and out of a building's envelope or shell. This is a continuous sheet composed of polyethylene, polypropylene, or extruded polystyrene. The sheet is wrapped around the outside of a house during ...

A movable plate used to control air flow; in a wood stove or fireplace, used to control the amount and direction of air going to the fire.

The positive pole or electrode of an electrolytic cell, vacuum tube, etc. (see also sacrificial anode).

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

The ratio of light reflected by a surface to the light falling on it.

The process of determining energy consumption, by various techniques, of a building or facility.

The use of direct, diffuse, or reflected sunlight to provide supplemental lighting for building interiors.

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.

An ideal substance that absorbs all radiation falling on it, and reflecting nothing.

Biomass converted directly to energy or converted to liquid or gaseous fuels such as ethanol, methanol, methane, and hydrogen.

That fraction of annual energy demand supplied by a solar system.

An insulation product composed of loose fibers or fiber pellets that are blown into building cavities or attics using special pneumatic equipment.

A device that cools air by removing moisture from it.

see Air-Source Heat Pump.

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

A measure of seasonal or annual efficiency of a central air conditioner or air conditioning heat pump. It takes into account the variations in temperature that can occur within a season and is the average number of Btu of cooling delivered for every watt- ...

Electromagnetic radiation in the wavelength range of 4 to 400 nanometers.

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

A structural, load-carrying building member with an open web system that supports floors and roofs utilizing wood or specific steels and is designed as a simple span member.