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Refrigerative Air Conditioning Glossary

Absorption Cycle:
Abosorption Cycles utilize a thermal or chemical process to produce the refrigeration effect necessary to provide chilled water. Most commercial absorption chillers utilize lithium bromide and water as the fluid pair.

Air Conditioner:
Assembly of equipment for the simultaneous control of air temperature and climate control.

Air Diffuser:
Air distribution outlet designed to direct airflow into desired patterns and places.

Air Flow:
The distribution or movement of air.

The ability of a heating or cooling system to heat or cool a given amount of space.

Central Air Conditioner System:
System in which air is developed at a central location and carried to and from the rooms by one or more fans and a system of ducts.

The pump that moves the refrigerant air from the indoor evaporator to the outdoor condenser and back to the evaporator again.

The process by which a gas is changed into a liquid at a constant temperature by heat removal.

Cooling Load:
Heat which flows into a space from outdoors and/or indoors.

Direct Vent:
Pulls outside air for combustion and vents combustion gases directly outside.

A pipe or closed conduit made of sheet metal, fiberglass board or other suitable material used for conducting air to and from an air conditioing unit.

Pipes or channels that carry air throughout a building or home.

Absorbs heat from the surrounding air or liquid and moves it outside the refrigerated area by means of a refrigerant.

A device used to remove dust and other particles from air for the purposes of reducing the load on the respiratory system.

Heat Pump:
An air conditioner that contains a valve that allows it to alternate between heating and cooling.

A device designed to regulate humidity input by reacting to changes in the moisture content of the air.

Indoor Unit:
This is usually located inside the house and contains the indoor coil, fan, motor and filtering device.

Any material that slows down the transfer of heat.

Kilowatt (kW):
Equal to 1,000 watts. Kilowatt-hour (kWh) - A common unit of electrical consumption measured by the total energy created by one kilowatt in one hour..

Package System:
A piece of air conditioning and heating equipment where all components are located in one cabinet.

A substance that produces a refrigerating effect while expanding or vaporizing.

Reversing Valve:
A device in a heat pump that reverses the flow of refrigerant as the system is switched from cooling to heating.

The temperature to which a thermostat is set for desired comfort level.

Split System:
A central air conditioner consisting of two or more major components. The system usually consists of a compressor-containing unit and condenser, installed outside the building and a non-compressor - containing air handling unit installed within the building. This is the most common type of system installed in a home.

The measure of the intensity of heat that a substance possesses.

A temperature control device, typically found on a wall inside the home that consists of a series of sensors.

The process of supplying or removing air, by natural or mechanical means, to or from any space.

A unit of power that equals one joule per second.

Zone System:
A method of dividing a home into zones and enabling you to control the amount of comfort provided to each.


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