What Is a Trunk Line Hvac

The trunk line is a line of ductwork that serves as the central distribution source for your ductwork system. It is attached directly to the plenum and runs through the entire length of your house. … Note: The trunk line is typically attached six inches from the top of the plenum.

What is trunk line?

Definition of trunk line 1 : a transportation system (such as an airline, railroad, or highway) handling long-distance through traffic. 2a : a main supply channel (as for gas or oil)

What is trunk and branch duct system?

A trunk and branch system has a large main supply and a large main exhaust duct (the trunks) that are connected to the ventilation unit itself.