Whirlpool W10692945 Installation Instructions Manual

5Venting Requirements■ Vent system must terminate to the outdoors.■ Do not terminate the vent system in an attic or other enclosedarea.■ Do not use 4" (10.2 cm) laundry-type wall caps.■ Use round, metal venting only. Rigid metal venting isrecommended. Plastic or metal foil venting is notrecommended.■ The length of the vent system and the number of elbowsshould be kept to a minimum to provide efficientperformance.For the Most Efficient and Quiet Operation:■ Use no more than three 90° elbows.■ Make sure there is a minimum of 24" (61.0 cm) of straightvent between the elbows if more than 1 elbow is used.■ Do not install 2 elbows together.■ Use clamps and metal duct tape to seal all joints in the ventsystem.■ The vent system must have a damper.■ Use weatherproof caulking compound to seal the exteriorwall or roof opening around the cap.■ The size of all venting should be uniform.Cold Weather InstallationsAn additional back draft damper should be installed to minimizebackward cold air flow. A thermal break should be installed tominimize conduction of outside temperatures as part of the ventsystem. The damper should be on the cold air side of the thermalbreak.The break should be as close as possible to where the ventsystem enters the heated portion of the house.Makeup AirLocal building codes may require the use of makeup air systemswhen using ventilation systems greater than specified CFM of airmovement. The specified CFM varies from locale to locale.Consult your HVAC professional for specific requirements in yourarea.Typical In-Line Smart Kit InstallationsA 6" (15.2 cm) round vent system is needed for installations (notincluded).The In-Line Smart Kit inlet and outlet openings are 6" (15.2 cm)round. The exhaust (outlet) opening on the range hood must alsobe 6" (15.2 cm) round.NOTE: Flexible vent is not recommended. Flexible vents createback pressure and air turbulence that can greatly reduce In-LineSmart Kit performance.The vent system may terminate either through the roof or wall.NOTE: Plywood may be used as a mounting base to span openareas between ceiling joists and rafters. If used, be sure to useplywood capable of supporting 25 Ib (11.3 kg).Calculating Vent System LengthTo calculate the length of the system you need, add theequivalent feet (meters) for each vent piece used in the system.The maximum recommended equivalent vent length is 35 ft(10.7 m).Example Vent SystemThe following example falls within the maximum recommendedvent length of 35 ft (10.7 m).A. Mounted on top of ceiling joists (vertical duct)B. Mounted to cross-members tied to trusses(horizontal duct)Vent Piece 6" (15.2 cm) Round45° elbow 2.5 ft(0.8 m)90° elbow 5.0 ft(1.5 m)1 - 90° elbow = 5.0 ft (1.5 m)1 - wall cap = 0.0 ft (0.0 m)8 ft (2.4 m) straight = 8.0 ft (2.4 m)Length of system = 13.0 ft (3.9 m)A B90 elbow 6 ft (1.8 m)2 ft(0.6 m)Wall cap