Chapter 5 Basic Duct Symbols and Drawings 99
Copyright Goodheart-Willcox Co., Inc.
5.3.3 Boots
A branch runout starts at the main supply duct and terminates at the
supply register, louver, or grille in the occupied space. The duct fi tting
that connects the branch runout to the supply register is called a boot.
Boots, Figure 5-25, are designed for dozens of applications and come in
multiple styles for use with wall, fl oor, ceiling, and other specialty supply
air applications.
2-P 2-Q 2-N
Goodheart-Willcox Publisher
Figure 5-24. Takeoff fi tting for round supply ducts.
Boot Types and Applications
Type Symbol Application
4-C Ceiling applications
Floor applications
4-M Wall applications
Floor applications
4-O Wall applications
Floor applications
4-Q Floor supply air applications
4-R Floor supply air applications
Goodheart-Willcox Publisher
Figure 5-25. Boot fi ttings are used to connect the branch runout to the supply
registers, grilles, or louvers. (continued)