A type of furnace in which fuel is burned and the heat is used to produce steam.

A value used to estimate interior air cooling requirements (load) calculated as the number of degrees per day (over a specified period) that the daily average temperature is above 65 degrees Fahrenheit (or some other, specified base temperature). The dail ...

Usually refers to ethanol to 160 to 200 proof.

The process of controlling indoor moisture levels and condensation.

A heat exchanger in which two fluids flow in opposite directions for transfer heat energy from one to the other.

A panel which covers the underside of an roof overhang, cantilever, or mansard.

The damping of interior temperature fluctuations by massive construction.

A solar heating system that uses a liquid as the heat transfer fluid.

The ratio of actual power being used in a circuit, expressed in watts or kilowatts, to the power that is apparently being drawn from a power source, expressed in volt-amperes or kilovolt-amperes.

A type of solar thermal system where sunlight is concentrated by a curved reflector onto a pipe containing a working fluid that can be used for process heat or to produce electricity. The world's largest solar thermal electric power plants use solar troug ...

One layer of glass in a window frame. It has very little insulating value (R-1) and provides only a thin barrier to the outside and can account for considerable heat loss and gain.

The lower or net heat of combustion for a fuel that assumes that all products of combustion are in a gaseous state. (See Net Heating Value below.)

The amount of solar energy that passes through a glazing material, expressed as a percentage.

Water in vapor form; used as the working fluid in steam turbines and heating systems.

The ratio of the sum of the noncoincidental maximum demands of two or more loads to their coincidental maximum demands for the same period.

A type of structural, insulated product with foam insulation contained between two facings of drywall, or structural wood composition boards such as plywood, waferboard, and oriented strand board.

Materials with high thermal energy storage capacity contained in or part of a building's walls, floors, or freestanding elements.

The amount of work done in raising one pound one foot.

The fossil fuels: coal, oil, and natural gas.

A device that converts high-pressure steam, produced in a boiler, into mechanical energy that can then be used to produce electricity by forcing blades in a cylinder to rotate and turn a generator shaft.