Duct To Sleeve Connection - Greenheck ODFD Series Installation, Operation And Maintenance Manual

Duct to Sleeve Connection

Sleeve Gauge and Connection Type Requirements
The size of the damper/duct determines the required sleeve gauge and the required duct to sleeve connection (see
table to the right). The sleeve thickness must also not be less than the gauge of the connecting duct. Any duct
connection other than the breakaway connections described below are considered rigid.
Sleeve Gauge
14 ga. (0.075 in.) -
10 ga. (0.138 in.)
[2 mm - 3.5 mm]
16 ga. (0.060 in.)
[1.5 mm]
16 ga. (0.060 in.)
[1.5 mm]
18 ga. (0.048 in.)
[1.2 mm]
20 ga. (0.036 in.)
[0.9 mm]
22 ga. (.030 in.)
[0.76 mm]
24 ga. (0.024)
[0.6 mm]
26 ga. (0.018 in.)
[0.46 mm]
See Breakaway Connection section for additional information.
UL Standard 555 requires all ducts to terminate at fire damper sleeves.
®
Duct Dimension
All duct sizes
36 in. (914 mm) max. width
24 in. (610 mm) max. height
24 in. (610 mm) diameter
All duct sizes
85 in. (2159 mm) wide and
over
55 in. - 84 in. wide
(1397 mm - 2134 mm)
31 in. - 54 in. wide
(787 mm - 1372 mm)
13 in. - 30 in. wide
(330 mm - 762 mm)
12 in. wide and under
(305 mm)
Type of Duct to Sleeve
Connection Permitted
Rigid or
Breakaway
Rigid or Breakaway
Breakaway only
Out of Wall Fire and Combination Fire Smoke Dampers 7