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

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 maximum load that a device is capable of carrying.

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

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

The approximate energy producing capacity of a power plant, under specified conditions, usually during periods of highest load.

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.

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

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.

A device for converting mechanical energy to electrical energy.

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.

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

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

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

The measure of seasonal or annual efficiency of a heat pump operating in the heating mode. It takes into account the variations in temperature that can occur within a season and is the average number of Btu of heat delivered for every watt-hour of electri ...

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

A substance(s) or pollutant emitted as a result of a process.

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

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 ...