
167
F
F
F: See Fahrenheit degrees.
Fabric Filter: Filter having a textile-based lter medium.
Face and Bypass Damper: A dual damper arrangement at the inlet of a heat-
ing or cooling coil that either acts to direct the ow of air through the heating
or cooling coil or acts to divert the air around the coil by the way of a bypass
air channel or duct. Usually controlled by a damper actuator that is posi-
tioned by a temperature controller.
Face Cleat (Coal): A longitudinal fracture in coal.
Face Seal: Allowing a at, usually polished, face to deform an elastomer and
create a seal.
Facies: The set of all characteristics of a sedimentary rock that dene ...