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

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

The purpose for which useful energy or work is consumed.

A condition that results from an imbalance between the number of protons and the number of electrons in a substance.

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.

A device that cuts off the flow of hot or cold air to or from a room as controlled by a thermostat.

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

Consist of three main layers. The top layer is near ambient and has low salt content. The bottom layer is hot, typically 160 F to 212 F (71 C to 100 C), and is very salty. The important gradient zone separates these zones. The gradient zone acts as a tran ...

Heat stored above room temperature (in a solar heating system).

The negative pole or electrode of an electrolytic cell, vacuum tube, etc., where electrons enter (current leaves) the system; the opposite of an anode.

A popular term for "non-conventional" transportation fuels derived from natural gas (propane, compressed natural gas, methanol, etc.) or biomass materials (ethanol, methanol).

The maximum load that a motor is capable of supplying.

A device that moves and/or circulates air and provides ventilation for a room or a building.

A colorless, pungent, gas (NH3) that is extremely soluble in water, may be used as a refrigerant; a fixed nitrogen form suitable as fertilizer.

Energy systems supply individual, or small-groups, of energy loads.

Discharging a battery to 20 percent or less of its full charge capacity.

A unit of power equal to 1 billion Watts; 1 million kilowatts, or 1,000 Megawatts.

A measure of the heating requirements of a building expressed in Btu per degree-day.

A component of a hydropower plant; a pipe that delivers water to the turbine.