A unit of rate of water evaporation equal to the evaporation per hour of 34.5 pounds of water at a temperature of 212 degrees Fahrenheit into steam at 212 degrees F.

An air conditioner consisting of one or more assemblies that move, clean, cool, and dehumidify air.

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 ...

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

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

The maximum load that a device is capable of carrying.

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

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

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

A material used to seal gaps around windows and exterior doors.

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

A device for converting mechanical energy to electrical energy.

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.

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

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 ...

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

A raw material that can be converted to one or more products.

see Peak Power

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 ( ...

In a wind energy conversion system, to pitch the turbine blades so as to reduce their lift capacity as a method of shutting down the turbine during high wind speeds.