HVAC and BEMS | Innotech Training

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F

FCU

Fan Coil Unit

FD

Fire Damper

Feedback

Control action in which a measured variable is compared to its desired value to produce an actuating error signal which is acted upon in such a way as to reduce the magnitude of the error.

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

Fuel Efficiency

The ratio of heat produced by a fuel for doing work to the available heat in the fuel.

Fuel Oil

Any liquid petroleum product burned for the generation of heat in a furnace or firebox, or for the generation of power in an engine. Domestic (residential) heating fuels are classed as Nos. 1, 2, 3; Industrial fuels as Nos. 4, 5, and 6.