STRAIGHT DUCT

SD

ELBOW 90°

E90

ELBOW 45°

RE4

WYE BRAND

WY

BRANCH TAKE OFF

BT

BRANCH SECTION CHANGE

BSC

PANT WYE

PW

PLENUM GRILLE

PG

BRANCH CONNECTIONS

BC

ECCENTRIC TRANSITION

ET

CONCENTRIC TRANSITION

CT

GOOSE NECK RADIUS

GNR

RECTANGULAR TO ROUND (RD)

RTR

OFFSET

OF