by
B A T H O L O G Y
18
Duct Specifications and Installation
A t m o s p h e r i c 320
Figure 3
Minimum radius =
the diameter of
flexible ducting used
Install duct fully extended. Do not install
in a compressed state or use excess lengths.
Flex Duct, 4”
Dimensions: 4” Diameter x 25’ Length
Insulation: Fiberglass
Outer Cover: Tri-directional, scrim reinforced grey polyester
Testing: U.L. Listed, Suitable for Wet Locations
R-Value: 4.2
Rated Positive Pressure: 10“ w.g. per UL-181
Maximum Positive: 6” w.g.
Maximum Negative: 3/4” w.g.
Maximum Velocity: 5000 FPM
Maximum Operating Temperatures: -20°F to 140°F
Continuous (@ maximum pressure)
Dimensions: 6” Diameter x 25’ Length
Insulation: Fiberglass
Outer Cover: Tri-directional, scrim reinforced grey polyester
Testing: U.L. Listed, Suitable for Wet Locations
R-Value: 4.2
Rated Positive Pressure: 10“ w.g. per UL-181
Maximum Positive: 6” w.g.
Maximum Negative: 3/4” w.g.
Maximum Velocity: 5000 FPM
Maximum Operating Temperatures: -20°F to 140°F
Continuous (@ maximum pressure)
1
Flex Duct, 6”
2
Y-Adapter, 4” x 4” x 6”
Input: 4” Diameter, 4” Diameter
Output: 6” Diameter
Composition: Galvanized sheet metal
Compliance: UL 181B
3
Flex Duct Tie, 36”
4
Compliance: UL 181B
Net Contents: 1/12 Gallon
Mastic Tube
6
Y-Adapter
4” x 4” x 6”
230 CFM Fan
Exhaust to Roof
Cap or Wall Vent
Damper, 4”
Expansion Vent
Flex Duct
Tie, 36”
4
Flex Duct,
6” x 25’
2
Flex Duct,
4” x 25’
1
3
Figure 1
Figure 2
Pull back outer
cover and insulation
Pull outer cover and insulation
to completely cover the fitting.
Apply Mastic (6)
over fitting and / or
inside the inner liner
Pull inner liner
at least 1” over fitting
Secure inner liner to fitting with tie
(18” for 4” duct, 36” for 6” duct)
Secure outer cover and
insulation to fitting
with 36” tie (4)
Apply additional mastic (4)
over the connection
Compliance: UL 181B
Flex Duct Tie, 18”
5
Flex Duct
Tie, 18”
5
Specifications
Installation
