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The illustrations shown provide useful information on the installation of grease duct systems. Each
installation is specific to the application and the job site. If you encounter a situation not covered by this
illustration, refer to the guide or consult the factory. The grease duct systems illustrated in this manual
have been tested to and comply with UL 2221, Tests of Fire Resistive Grease Duct Enclosure Assemblies.
Adjustable duct and standard ducts are used to terminate at the transition plate. The duct section is fully
welded to the transition plate at the factory.
Figure 32 - Grease Duct Installation Guide Details View 2
1. Exhaust Fan
2. Vented Curb
3. Roof
4. Adjustable Duct
5. Double V-band
6. Standard Duct Length
7. Insulated Access Door Cover/Tee - Provided
when there is a change in direction.
8. Riser Cover
9. Exhaust Hood
10. First Vertical Support - Located at
joint #1, after a change in direction.
Installed under the double V-band.
11. Second Vertical Support - Installed under the
double V-band.
A. Horizontal Support Spacing, refer to Table 5
B. Hood Width
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