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

A plastic foam insulation product, pressed or extruded into board-like forms, used as sheathing and insulation for interior basement or crawl space walls or beneath a basement slab; can also be used for exterior applications inside or outside foundations, ...

Any liquid petroleum product burned for the generation of heat in a furnace or firebox, or for the generation of power in an engine. Domestic (residential) heating fuels are classed as Nos. 1, 2, 3; Industrial fuels as Nos. 4, 5, and 6.

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

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

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

An electrical device that resists electric current flow.

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.

Infrared or radiant heat.

The number of cycles through which an alternating current passes per second; in the U.S. the standard for electricity generation is 60 cycles per second (60 Hertz).

To influence the demand on a power source.

The temperature of the air as measured by a standard thermometer.

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 ...

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

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

A type of inverter that produces square wave output.; consists of a DC source, four switches, and the load. The switches are power semiconductors that can carry a large current and withstand a high voltage rating. The switches are turned on and off at a c ...

This type of heat pump is known as an air-to air system.

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

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 ...

The flow rate in these systems is 1/8 to 1/5 the rate of most solar water heating systems. The low-flow systems take advantage of stratification in the storage tank and theoretically allows for the use of smaller diameter piping to and from the collector ...