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
Pascals (Pa)
A small unit of air pressure.
PCB
Printed Circuit Board.
Pitot Tube
A sensing device used to measure total pressures in a fluid stream. It was invented by a French physicist, Henri Pitot, in the 1700's.
Plenum
An air flow passage.
Pressure Coefficient
A dimensionless parameter relating the static pressure potential of a fan to its tip velocity pressure equivalent. It's used to determine approximate fan diameter.