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3
ALL WALL AND FLOOR OPENINGS WHERE THE RANGEHOOD IS INSTALLED
MUST BE SEALED.
Consult the cooktop or range installation instructions given by the manufacturer before making
any cutouts. MOBILE HOME INSTALLATION The installation of this rangehood must conform
to the Manufactured Home Construction and Safety Standards, Title 24 CFR, Part 3280 (formerly
Federal Standard for Mobile Home Construction and Safety, Title 24, HUD, Part 280). See
Electrical Requirements.
• Venting system MUST terminate outside the home.
• DO NOT terminate the ductwork in an attic or other enclosed space.
• DO NOT use 4" laundry-type wall caps.
• Flexible-type ductwork is not recommended.
• DO NOT obstruct the ow of combustion and ventilation air.
• Failure to follow venting requirements may result in a re.
WARNING
!
Cold Weather installations
An additional back draft damper should be installed to minimize backward cold air ow and a
nonmetallic thermal break should be installed to minimize conduction of outside temperatures
as part of the vent system. The damper should be on the cold air side of the thermal break.
The break should be as close as possible to where the vent system enters the heated portion
of the house.
VENTING REQUIREMENTS
Determine which venting method is best for your application. Ductwork can extend either through
the wall or the oor.
The length of the ductwork and the number of elbows should be kept to a minimum to provide ef-
cient performance. The size of the ductwork should be uniform. Do not install two elbows together.
Use duct tape to seal all joints in the ductwork system. Use caulking to seal exterior wall or oor
opening around the cap.
Flexible ductwork is not recommended. Flexible ductwork creates back pressure and air
turbulence that greatly reduces performance.
Make sure there is proper clearance within the wall or oor for exhaust duct before making cutouts.
Do not cut a joist or stud unless absolutely necessary. If a joist or stud must be cut, then a support-
ing frame must be constructed.
WARNING - To Reduce The Risk Of Fire, Use Only Metal Ductwork.
CAUTION-Toreduceriskofreandtoproperlyexhaustair,besuretoductairoutside–Do
not vent exhaust air into spaces within walls or ceilings or into attics, crawl spaces, or garages.
3. When cutting or drilling into wall or ceiling, do not damage electrical wiring and
other hidden utilities.
4. Ducted fans must always be vented to the outdoors.
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