Glossary of Heating, Ventilation and Air Conditioning Terms

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
IAQ
Indoor Air Quality (IAQ) refers to the cleanliness and health of the air in a home.
Indoor/Outdoor System

Refers to a comfort system consisting of components in two locations. Common examples include an outside unit, such as an condensing unit, and an indoor unit such as an fan coil unit.


Infiltration

Air that leaks into a structure through cracks, windows, doors or other openings due to less pressure inside the structure than outside the structure.


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