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INSTALLATIONS
Exhaust system
INSTALLATION DIAGRAM FOR MODEL FG DUCT FANS
1. When installing, keep the number of elbows and bends to a minimum. If necessary, long radius elbows or bends are recommended.
2. Duct sealant, caulk, or tape should be applied to all seams, including around the opening in the wall or ceiling on the interior and around
exterior building penetrations, to prevent air leakage and maximize air performance.
3. Flex, spiral, or snap lock ducting may be used. If using rigid duct, Fantech FC clamps are recommended to connect duct work to
the fan (see illustration 2).
FC clamps make an air tight seal at the connection points and reduce vibrations transmitted throughout the duct system.
4. To minimize static pressure losses and promote adequate airflow, minimize duct run lengths where possible. If using flex duct, keep duct
runs straight and taut.
5. If installing in an unconditioned space, covering the fan with insulation is recommended to prevent condensation from forming.
6. For general ventilation applications, at least 8 ft of insulated flexible duct shall be installed between the exhaust or supply grille(s) and
the fan.
The ducting from this fan to the outside of the building has a strong effect on the air flow, noise and energy use of the fan. Use the short-
est, straightest duct routing possible for best performance, and avoid installing the fan with smaller ducts than recommended. Insulation
around the ducts can reduce energy loss and inhibit mold growth. Fans installed with existing ducts may not achieve their rated air flow.
Illustration 1
Fan bracket
should be
installed, then
fan mounted
directly to
bracket using
sheet metal
screws.
Illustration 2
Clamp Fastener
Fans may be sus-
pended without
special mounting
brackets.
Vibration absorbing material
Ceiling exhaust system
Models
• 4XL EC
Duct Fan
Screws
Spiral duct
Horizontal installation
Models
• 6M EC
• 10 EC
• 8 EC
Mounting Bracket & Screw Locations for FG
Models
• 6M EC
• 8 EC
• 10 EC
Exhaust system
Mount bracket
to fan first!
Models
• 12XL EC
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