Unified Brands Kitchen Ventilation Systems - Manual (Page 8)

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1. Check all local codes prior to installation.
2. Supply fan inlet must be located to minimum 10’-0’ from the exhaust fan. If 10’-0’ is
not possible a 3’ vertical separation may be acceptable.
3. Cut and seal supply fan curb to roof.
4. Duct shall be constructed of 22 or 24 gauge steel Insulated duct material should be
used to eliminate frost and/or condensation.
5. Duct shall be sized to provide air velocities not exceeding 1200 FPM.
6. A volume control damper, provided in the duct just above the supply collar that
contains the U.L. listed fire damper, should be properly set to supply CFM required.
7. If the hood is provided without the supply collar installed, it must be installed per the
instructions provided on the collar.
8. Carefully place the supply fan on roof curb. Face supply fan inlet away from prevail-
ing winter wind. Electrical back draft damper is recommended in cold climates.
9. Bolt or screw fan to fan curb.
10. Make all necessary electrical connections and check fan for proper rotation.
“NOTE”: Fan will supply air running in wrong direction.
* Dependent on local code requirements.
FRESH AIR SUPPLY FAN
Fig. 7