A pole used to assist in raising a tower.

The price paid for goods or services at the time of a transaction; a price that has not been adjusted to account for inflation.

A gas that does not react with other substances; e.g. argon or krypton; sealed between two sheets of glazing to decrease the U-value (increase the R-Value) of windows.

A seal used to prevent the leakage of fluids, and also maintain the pressure in an enclosure.

A salt, sodium sulfate decahydrate, that melts at 90 degrees Fahrenheit; a component of eutetic salts that can be used for storing heat.

One thousand kilowatts, or 1 million watts; standard measure of electric power plant generating capacity.

Equal to gross generation less electricity consumption of a power plant.

This designates the resistance of a material to heat conduction. The greater the R-value the larger the number.

A type of water heater that has no storage tank thus eliminating storage tank standby losses. Cold water travels through a pipe into the unit, and either a gas burner or an electric element heats the water only when needed.

Individual rooms or zones in a building where temperature is controlled separately from other rooms or zones.

These lights use an electrically heated filament to produce light in a vacuum or inert gas-filled bulb.

A type of water heater that circulates water through a heat exchanger in a boiler. The heated water then flows into an insulated storage tank.

The ratio of the percentage change in the quantity of a good or service demanded to the percentage change in the price.

A hydrocarbon gas obtained from underground sources, often in association with petroleum and coal deposits. It generally contains a high percentage of methane, varying amounts of ethane, and inert gases; used as a heating fuel.

An instrument for measuring solar radiation.

A building energy auditing technique for locating areas of low insulation in a building envelope by means of a thermographic scanner.

A house built using passive solar design techniques.

The minimum temperature at which combustion of a solid or fluid can occur.

The unit price of a good or service estimated from some base year in order to provide a consistent means of comparison.

A measure of the amount of energy lost during the generation, transmission, and distribution of electricity.