Glossary Terms

A method of dividing a home into different comfort zones so each zone can be independently controlled depending on use and need; an air conditioning system capable of maintaining varying conditions for various rooms or zones.

A method of dividing a home into different comfort zones so each zone can be independently controlled depending on use and need; an air conditioning system capable of maintaining varying conditions for various rooms or zones.

A thermometer whose bulb is covered with a piece of water-soaked cloth. The lowering of temperature that results from the evaporation of water around the bulb indicates the air’s relative humidity.

The unit of electrical power equal to the flow of one amp at a potential difference of one volt.

The force that pushes electrical current along wires and cables.

The unit of measure used to describe a difference in electrical potential, abbreviated by the symbol “v.”

A pressure below atmospheric pressure. A perfect vacuum is 30 inches of mercury (periodic symbol “Hg”)

A furnace in which air is drawn in through the sides or bottom and discharged out the top.

Underwriters Laboratories

The factor representing resistance to heat flow of various building materials.