Standardized weights or volumes for heating fuels.

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

Any gaseous, liquid, or solid fuel used for indoor space heating.

A device for converting mechanical energy to electrical energy.

A unit of electrical capacitance; the capacitance of a capacitor between the plates of which there appears a difference of 1 Volt when it is charged by one coulomb of electricity.

see Peak Power

The maximum load that a device is capable of carrying.

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

Under the First Law of Thermodynamics, efficiency is the ratio of work or energy output to work or energy input, and cannot exceed 100 percent. Efficiency under the Second Law of Thermodynamics is determined by the ratio of the theoretical minimum energy ...

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

A measure of air purity that is equal to one complete air change (in an interior space).

Solid fuels made from primarily wood sawdust that is compacted under high pressure to form small (about the size of rabbit feed) pellets for use in a pellet stove.

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

A federal agency established in 1933 to develop the Tennessee river valley region of the southeastern U.S., and which is now nation's largest power producer.

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

A curve that indicates the number of hours per year that specific wind speeds occur.

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.

The amount of visible light that passes through the glazing material of a window, expressed as a percentage.

The amount of work accomplished by electrical power, usually measured in kilowatt-hours (kWh). One kWh is 1,000 Watts and is equal to 3,413 Btu.2.The energy of moving electrons.

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