The space-conditioning load of a building.

The conversion of biomass into a gas, by biogasification (see above) or thermal gasification, in which hydrogen is produced from high-temperature gasifying and low-temperature pyrolysis of biomass.

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

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

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.

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.

A standard unit of electrical power equal to one thousand watts, or to the energy consumption at a rate of 1000 Joules per second.

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

Referring to alterations in the environment due to the presence or activities of humans.

see Air-Source Heat Pump.

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

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

An interior wall made of water filled containers for absorbing and storing solar energy.

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 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- ...

A type of hydroturbine in which the entire generator is mounted inside the water passageway as an integral unit with the turbine. These installations can offer significant reductions in the size of the powerhouse.

The total cost of production divided by the total quantity produced.

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.

The maximum heat output (in Btu per hour) released by a burner with a stable flame and satisfactory combustion.

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