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

A thermal storage wall is a south-facing wall that is glazed on the outside. Solar heat strikes the glazing and is absorbed into the wall, which conducts the heat into the room over time. The walls are at least 8 in thick. Generally, the thicker the wall, ...

Standardized weights or volumes for heating fuels.

Any light source designed specifically to direct light a task or work performed by a person or machine.

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 device for converting a solid fuel to a gaseous fuel.

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

Air brought into a building from outside to replace exhaust air.

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 ...

Those elements of building used to control the interior climate.

A large number of thermocouples connected in series.

The heat absorbed or released when a substance undergoes a change in temperature.

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.

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

see Peak Power

A column of burning combustion gases that are so hot and strong that the heat is lost up the chimney before it can be transferred to the house. A draft brings air to the fire to help keep it burning.

A diagram that indicates the average percentage of time that the wind blows from different directions, on a monthly or annual basis.

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

An air heater in which air is blown over electric resistance heating coils.