Browse the glossary using this index

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F

FCU

Fan Coil Unit


FD

Fire Damper


Filter (Air)

A device that removes contaminants, by mechanical filtration, from the fresh air stream before the air enters the living space.  Filters can be installed as part of a heating/cooling system through which air flows for the purpose of removing particulates before or after the air enters the mechanical components.


FLA

Full Load Amps


Forced Air System or Furnace

HVAC term for a type of heating system in which heated air is blown by a fan through air channels or ducts to rooms.


Freon

A registered trademark for a CFC (Chlorofluorocarbon) gas that is highly stable and that has been historically used as a refrigerant.


FS

Flow Switch