DICTIONARY

ACCA

Air Conditioning Contractors of America

AFUE

Annual Fuel Utilization Efficiency

Air Conditioner

A device that changes humidity levels, temperature or quality of air

BTUh

British thermal units per hour

Capacity

HVAC capacity is the output produced by the heating or cooling unti and is measured in BTUs per hour

Dehumidifier

A device that removes humidity or moisture from the air

EER

Energy Efficient Ratio

EPA

Environmental Protection Agency

Evaporator coil

Also an indoor coil. A device that is designed to absorb heat in the air in order to change the liquid refrigerant that leaks thorugh it into a vapor

Fahrenheit

A temperature scale in which water freezes at 32 degrees and boils at 212 degrees at normal atmospheric pressure

Heat exchanger

A device through which heat is transferred to a cold area of surface

Heat pump

A device used for either the heating or cooling of a space by transferring heat between two reservoirs

Humidifier

A device that adds humidity or moisture to the air

HVAC

Heating, Ventilation, Air Conditioning

Media

The fine material of a filter that traps dirt, dust, mildew or bacteria

Package unit

A heating and cooling systerm contained in one outdoor unit

PSI

Pounds per square inch

Refrigerant

A chemical that condenses from a vapor to liquid and in the process decreases in temperature

SEER

Seasonal Energy Efficiency Ratio, a rating system developed by the U.S. government to indicate the efficiency level of cooling equipment.

Self-contained unit

A package unit

Split system

An outdoor unit combined with an indoor unit

Thermostat

Sensor that monitors and controls output of HVHC system

Ton

One ton is 12,000 BTU's per hour

Zoning

A system that divides a home, office or space into different regions in order to better control the temperature and effectiveness of a heating and cooling system