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Model 423
4½ x 18½ to 10”
Rd.
Vertical
Transition
Model 424
4½ x 18½
to 10” Rd.
Front/Rear
Transition
Model 418
10” Round
90
0
Elbow
1
Model 437
High-Capacity
Roof Cap
Model 320 Interior Blower
(420 cfm)
Model 323 Interior Blower
(1170 cfm)
Model 329H Interior Control Pack
(for use with Models 331H &
332H)
4
10
1
2
23
1
2
10
1
2
23
1
2
Model 422
4½” x 18½”
Rough-in
Plate
Model 420
3¼” x 10”
Rough-in
Plate
Model 454
4½ x 18½
to 10” Rd.
Right
Transition
Model 421
10" Round
Damper
Models
331H &
332H
Exterior
Blowers
Model 428
3¼” x 10"
90
0
Elbow
Models 411, 412H, 413
3¼” x 10" to 6”, 7”, 8”
Round Transition
Model 634
Roof Cap
CUSTOM HOOD BLOWER SYSTEM
Straight ductwork
sections
(NOT SHOWN).
2 ft. lengths
most common.
(320 & 329)
(323)
9
Included with
Model 329H
4½” x 18½”
Rough-in
Plate
13