The process of cooling by which a heat absorbing media absorbs heat from one source and radiates the heat away.

The rate of heat flow required to maintain a specific indoor temperature; usually measured in Btu per hour.

Any device (or plant) that follows the sun's apparent movement across the sky.

This is a national organization dedicated to representing the interests of cooperative electric utilities and the consumers they serve. Members come from the 46 states that have an electric distribution cooperative.

These lights use an electrically heated filament to produce light in a vacuum or inert gas-filled bulb.

An elementary particle of an atom with a negative electrical charge and a mass of 1/1837 of a proton; electrons surround the positively charged nucleus of an atom and determine the chemical properties of an atom.

The ratio of the percentage change in the quantity of a good or service demanded to the percentage change in the price.

An electricity generating facility that uses geothermal energy.

In a given electrical circuit, the amount of current in amperes (i) is equal to the pressure in volts (V) divided by the resistance, in ohms (R).

Energy produced by the conversion of biomass directly to heat or to a liquid or gas that can be converted to energy.

The area of glass that fits in the window frame.

Energy output from a system that equals energy input.

Power generated by a utility unit that operates at a very low capacity factor; generally used to meet short-lived and variable high demand periods.

A measure of the average amount of a specified pollutant or material emitted for a specific type of fuel or process.

A type of heating appliance similar to a fireplace, but much more efficient and clean burning. They are made of masonry and have long channels through which combustion gases give up their heat to the heavy mass of the stove, which releases the heat slowly ...

Equal to gross generation less electricity consumption of a power plant.

One thousand kilowatt-hours or 1 million watt-hours.

A solar water or space-heating system in which solar energy is collected, and/or moved by natural convection without using pumps or fans. Passive systems are typically integral collector/storage (ICS; or batch collectors) or thermosyphon systems. The majo ...

The electrical power that oscillates between the magnetic field of an inductor and the electrical field of a capacitor. Reactive power is never converted to non-electrical power. Calculated as the square root of the difference between the square of the ki ...

A device or media that absorbs heat for storage for later use.