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

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.

As defined by the Energy Security Act (PL 96-294) of 1980, "any organic matter which is available on a renewable basis, including agricultural crops and agricultural wastes and residues, wood and wood wastes and residues, animal wastes, municipal wastes, ...

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

To disconnect a transmission and/or distribution line; a power line that is not carrying a current; to open a circuit.

A term used for the transparent or translucent material in a window. This material (i.e. glass, plastic films, coated glass) is used for admitting solar energy and light through windows.

A combustion heating appliance that vents the combustion by-products directly into the heated space. The latest models have oxygen-sensors that shut off the unit when the oxygen level in the room falls below a safe level.

In reference to solar energy systems, the angle that a solar collector is positioned above horizontal.

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

A device that cools air by removing moisture from it.

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

A method of preventing oxidation of the exposed metal in structures by imposing between the structure and the ground a small electrical voltage.

The maximum load that a motor is capable of supplying.

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 ...

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

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

A slender threadlike spike of pure crystalline material, such as silicon.

A program of the U.S. Department of Energy (DOE) that implements energy legislation and presidential directives. FEMP provides project financing, technical guidance and assistance, coordination and reporting, and new initiatives for the federal government ...

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