One pound of water in vapor phase; is NOT steam pressure, which is expressed as pounds per square inch (psi).

The process of burning; the oxidation of a material by applying heat, which unites oxygen with a material or fuel.

A toilet that uses less water than a standard one during flushing, for the purpose of conserving water resources.

The ability to dispatch power.

The physical process by which a liquid or solid is transformed into the gaseous state. For this process a mechanical device uses the outside air's heat to evaporate water that is held by pads inside the cooler. The heat is drawn out of the air through thi ...

A type of house that has massive amounts of insulation, airtight construction, and controlled ventilation without sacrificing comfort, health, or aesthetics.

Waste water from a household source other than a toilet. This water can be used for landscape irrigation depending upon the source of the greywater.

A building heating, ventilation, and/or air conditioning system that distributes conditioned air to individual zones or rooms.

A power plant that produces electricity by the force of water falling through a hydro turbine that spins a generator.

To influence the demand on a power source.

A law that requires electric utilities to purchase electricity produced from qualifying power producers that use renewable energy resources or are cogenerators. Utilities are required to purchase power at a rate equal to the avoided cost of generating the ...

A device or material with a high resistance to electricity flow.

The direct, diffuse, and reflected solar radiation that strikes a surface.

A group of solar photovoltaic modules connected together.

A popular term used for an evaporative cooling device.

A process used to apply photovoltaic semi-conductor material to a substrate by a physical vapor deposition process where high-energy ions are used to bombard elemental sources of semiconductor material, which eject vapors of atoms that are then deposited ...

A load management objective that moves loads from on-peak periods to off-peak periods.

A system of astronomical time in which the sun crosses the true north-south meridian at 12 noon, and which differs from local time according to longitude, time zone, and equation of time.

A building with more than 50 percent of its floorspace used for commercial activities, which include stores, offices, schools, churches, libraries, museums, health care facilities, warehouses, and government buildings except those on military bases.

In reference to solar photovoltaic devices, the growth of one crystal on the surface of another crystal. The growth of the deposited crystal is oriented by the lattice structure of the original crystal.