A tube inside a domestic water heater that distributes the cold water from the cold water supply line into the lower area of the water heater where heating occurs.

The ability of an electric power consumer to purchase electricity from a supplier of their choice without being physically inhibited by the owner of the electric distribution and transmission system to which the consumer is connected to. (See also Open Ac ...

Solar radiation that arrives in a straight line from the sun.

A type of combustion heating system in which combustion air is drawn directly from outside and the products of combustion are vented directly outside. These features are beneficial in tight, energy-efficient homes because they will not depressurize a home ...

A type of water heater in which heated water is stored within the tank. Hot water is released from the top of the tank when a hot water faucet is turned. This water is replaced with cold water that flows into the tank and down to just above the bottom pla ...

The process by which sunlight directly enters a building through the windows and is absorbed and stored in massive floors or walls.

A method of financial and economic analysis used to determine present and future values of investments or expenses.

The ability to dispatch power.

To schedule and control the generation and delivery of electric power.

A source of power (electricity) that can displace power from another source so that source's power can be transmitted to more distant loads.

A popular term for localized or on-site power generation.

The process of distributing electricity; usually defines that portion of an electrical utility's power lines between a utility's power pole and transformer and a customer's point of connection/meter.

(see Feeder)

One or more circuits of a distribution system on the same line or poles or supporting structures' usually operating at a lower voltage relative to the transmission line.

That portion of an electricity supply system used to deliver electricity from points on the transmission system to consumers.

A heating system in which steam or hot water for space heating or hot water is piped from a central boiler plant or electric power/heating plant to a cluster of buildings.

The ratio of the sum of the noncoincidental maximum demands of two or more loads to their coincidental maximum demands for the same period.

A computer software program that simulates energy consumption of commercial buildings; used for design and auditing purposes.

An architectural design invented by Buckminster Fuller with a regular polygonal structure based on radial symmetry.

Water heated for residential washing, bathing, etc.