INSTALLATION INSTRUCTIONSREAD & SAVE THESE INSTRUCTIONS!IMPORTANT SAFETY INSTRUCTIONSWARNING: TO REDUCE THE RISK OF FIRE.ELECTRIC SHOCK, OR INJURY TO PERSONS,OBSERVE THE FOLLOWING:A. Use this unit only in the manner intended by themanufacturer. If you have questions, contact themanufacturer.B. Before servicing or cleaning unit, switch power off atservice panel and lock service panel to prevent power frombeing switched on accidentally.When the service disconnecting means cannot be locked,securely fasten a prominent warning device, such as a tag,to the service panel.CAUTION:For general ventilating use only. Do not use to exhausthazardous or explosive materials and vapors.INSTALLATION INSTRUCTIONSWARNING: TO REDUCE THE RISK OF FIRE,ELECTRIC SHOCK, OR INJURY TO PERSONS,OBSERVE THE FOLLOWING:A. Installation work and electrical wiring must be done byqualified person(s) in accordance with all applicable codesand standards, including fire-rated construction.B. Sufficient air is needed for proper combusition andexhausting of gases through the flue (chimney) of fuelburning equipment to prevent back drafting. Follow theheating equipment manufacturer's guideline and safetystandards such as those published by the National FireProtection Association (NFPA), and the American Societyfor Heating, Refrigeration and Air Conditioning Engineers(ASHRAE), and the local code authorities.C. When cutting or drilling into wall or ceiling, do not damageelectrical wiring and other hidden utilities.D. Ducted fans must always be vented to the outdoors.E. If this unit is to be installed over a tub or shower, it must bemarked as appropriate for the application.F. NEVER place a switch where it can be reached from a tubor shower.• Do not mount over tub or in shower enclosure.• Suitable for use with solid-state speed controls.If the installation presents a problem that is not explainedhere or if any parts of these instructions are not clear, consulta professional installer. If you are not familiar with methods ofinstalling electrical wiring, or if you are not certain as to thecorrectness of any step or procedure described, secure theservices of a qualified electrician.INSTALLING THE HOUSING• Cutout dimension: 9" diameter• Blade Size: 8"• Grille Diameter: 101⁄2"MPORTANT: Remove shipping tape that secures louver.1. Slide hanger bars (adjustable for 24" O.C. joists) throughtabs in housing. Nail one hanger bar to joist and slideventilator to desired position. Nail second hanger bar tojoist: cocking it slightly to clamp fan into place.8˝ Round FanMODEL: 8310