Energy generated from an electromagnetic field produced by an electric current flowing through a superconducting wire kept at a specific low temperature.

A way of joining photovoltaic cells or modules by connecting positive leads together and negative leads together; such a configuration increases the current, but not the voltage.

A device that uses electronic components to regulate the voltage of fluorescent lamps.

The rate of energy transfer equivalent to one ampere under an electrical pressure of one volt. One watt equals 1/746 horsepower, or one joule per second. It is the product of Voltage and Current (amperage).

The loss of heat as the water circulates through a water heater tank and inlet and outlet pipes.

The fine liquid or solid particles contained in combustion gases. The quantity and size of particulates emitted by cars, power and industrial plants, wood stoves, etc are regulated by the U.S. Environmental Protection Agency.

The maximum energy demand or load in a specified time period.

A heat exchanger in which heat is recovered from the products of combustion.

The generation of an electric current, when two conductors of different metals are joined at their ends to form a circuit, with the two junctions kept at different temperatures.

For valves and fittings, implies that they are suitable for working pressures between 125 to 175 pounds per square inch.

The replacement of a non-functional or ineffective lamp with a new, more efficient lamp.

A mainly flat surface for transmitting radiant energy.

A popular term used to describe the increase in average global temperatures due to the greenhouse effect.

A structure or media that absorbs heat.

The power output of a device under specific or nominal operating conditions.

A power source/generator that operates independently of or is not connected to an electric transmission and distribution network; used to meet a load(s) physically close to the generator.

The heat-transfer (exchanger) component of a heatpump, located outdoors, from which heat is collected in the heating mode, or expelled in the cooling mode.

The area of glass that fits in the window frame.

A wheel that is designed to use the weight and/or force of moving water to turn it, primarily to operate machinery or grind grain.

A unit of rate of operation. Electrical Hp: a measure of time rate of mechanical energy output; usually applied to electric motors as the maximum output; 1 electrical Hp is equal to 0.746 kilowatts or 2,545 Btu per hour. Shaft Hp: a measure of the actual ...