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.

The process in which a solid fuel is converted into a gas; also known as pyrolitic distillation or pyrolysis. Production of a clean fuel gas makes a wide variety of power options available.

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

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

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

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.

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

The prescribed level of pollutants allowed in outside or indoor air as established by legislation.

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

A measure of the electrical resistance of a material equal to the resistance of a circuit in which the potential difference of 1 volt produces a current of 1 ampere.

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

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

The maximum load that a device is capable of carrying.

Waste material from households and businesses in a community that is not regulated as hazardous.

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

A unit of measurement for the ability of a material to retard the diffusion of water vapor at 73.4 F (23 C). A perm, short for permeance, is the number of grains of water vapor that pass through a square foot of material per hour at a differential vapor p ...

The effect of cooling by the radiation of heat from a building to the night sky.

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.

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