The cutting of a grid pattern of grooves in a semiconductor material, generally for the purpose of making interconnections.

The maximum load that a device is capable of carrying.

A device mounted in the vent connector that closes the vent when the heating unit is not firing. This traps heat inside the heating system and house rather than letting it draft up and out the vent system.

These brines are hot (300 F to 400 F) (149 C to 204 C) pressurized waters that contain dissolved methane and lie at depths of 10,000 ft (3048 m) to more than 20,000 ft (6096 m) below the earth's surface. The best known geopressured reservoirs lie along th ...

A profile of how the wind speed changes with height above the surface of the ground or water.

The point or outdoor temperature where the heating capacity of a heat pump matches the heating requirements of a building.

A unit of electrical capacitance; the capacitance of a capacitor between the plates of which there appears a difference of 1 Volt when it is charged by one coulomb of electricity.

A device for converting mechanical energy to electrical energy.

The storage of heat energy during utility off-peak times at night, for use during the next day without incurring daytime peak electric rates.

A thin sheet of material (metal) of a heat exchanger that conducts heat to a fluid.

The amount of BTU's/hour or kW's produced by a heating system from the burning of a fuel.

Fuel gas with a heating value of between 200 and 300 Btu per cubic foot.

The unit price and quantity to which it applies as specified in a rate schedule or contract.

The physically connected generation, transmission, and distribution facilities and components operated as a unit.

A type of lamp having a lens of heavy durable glass that focuses the light. They have longer lifetimes with less lumen depreciation than standard incandescents.

The natural, convective movement of air or water due to differences in temperature. In solar passive design a thermosyphon collector can be constructed and attached to a house to deliver heat to the home by the continuous pattern of the convective loop (o ...

A material that can be used to store thermal energy as latent heat. Various types of materials have been and are being investigated such as inorganic salts, eutectic compounds, and parrafins, for a variety of applications, including solar energy storage ( ...

An incorporated right, liberty, privilege, or use of another entity's property, distinct from ownership, without profit or compensation; a right-of-way.

A type of (geothermal) heat pump that uses well (ground) or surface water as a heat source. Water has a more stable seasonal temperature than air thus making for a more efficient heat source.

The visible portion of the electromagnetic spectrum with wavelengths from 0.4 to 0.76 microns