A smaller version of standard fluorescent lamps which can directly replace standard incandescent lights. These lights consist of a gas filled tube, and a magnetic or electronic ballast.

A term used to describe short and long-term affects on the Earth's climate as a result of human activities such as fossil fuel combustion and vegetation clearing and burning.

The temperature that a system is designed to maintain (inside) or operate against (outside) under the most extreme conditions.

A type of furnace in which fuel is spread, automatically or mechanically, across the furnace grate.

A thermodynamic property of a substance, defined as the sum of its internal energy plus the pressure of the substance times its volume, divided by the mechanical equivalent of heat. The total heat content of air; the sum of the enthalpies of dry air and w ...

An electrical device that resists electric current flow.

A column of gas at standard conditions of temperature and pressure (32 degrees Fahrenheit and one atmosphere).

A thermostat that can be set to automatically lower temperatures in an unoccupied house and raise them again before the occupant returns.

Materials that prevent or slow down the movement of heat.

The demand on an energy producing system; the energy consumption or requirement of a piece or group of equipment.

The height above the ground that a horizontal axis wind turbine's hub is located.

A combustion heating appliance in which heat is captured from the burning of a fuel for distribution, comprised mainly of a combustion chamber and heat exchanger.

A type of heating appliance that performs more than one function, for example space and water heating.

The sum of sensible heat and latent heat in a substance above a base temperature, typically 32 degrees Fahrenheit.

An open-loop solar heating system in which the heat transfer fluid from the collector loop and the piping drain into a drain whenever freezing conditions occur.

A general term for the visible and near visible (ultraviolet and near-infrared) electromagnetic radiation that is emitted by the sun. It has a spectral, or wavelength, distribution that corresponds to different energy levels; short wavelength radiation ha ...

Technologies that pertain to the generation of electricity.

The amount of energy absorbed (or converted) by a solar collector (or photovoltaic cell or module) over a 15 minute period.

Water heated for residential washing, bathing, etc.

An electric generator consists of an armature and a field structure. The armature carries the wire loop, coil, or other windings in which the voltage is induced, whereas the field structure produces the magnetic field. In small generators, the armature is ...