registries are fittings that direct the airflow from the branch line of a ductrun system to the registers or diffusers in the room.
Which of the following describes an air pressure produced by the duct system?
Three different types of pressure are produced by airflow through a duct system: static, dynamic (velocity), and total. These pressures can all be gauged. A duct system's construction is subject to both static and dynamic (velocity) pressures from the air it transports.
What make up the parts of a forced air system?
Forced-air heating system components
exchanger of heat.
Blower.
the return ducts (sucks in cool air)
delivery ducts (pushes warm air into different rooms)
Plenum of air.
Limit switch for fans.
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