Glossary of Applied Air HVAC Terminology

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
The resistance or opposition to airflow in a system. Same as back pressure or static pressure.
Impeller
The component of a fan assembly that is composed of a number of contoured blades.
Inches of Water Gage or Column (IN WG or IN WC)
A unit of air pressure measurement equal to the pressure exerted by a column of water 1 inch high.
Induction
Process by which the primary air sets into motion an air volume, called secondary air, in the room.