Jenn-Air W10253462A User Manual

5Venting RequirementsIMPORTANT: This range must be exhausted outdoors. See“Venting Methods” section.■ Do not terminate the vent system in an attic or other enclosedarea.■ Use a Jenn-Air wall cap.■ Vent system must terminate to the outside.■ Use only a 6" (15.2 cm) round metal vent or a 3¼ x 10"(8.3 cm x 25.4 cm) rectangular vent, except as follows:5" (12.7 cm) round metal vent may be used for ventingstraight out the back of the range and directly through thewall for vent lengths of 10 ft (3.0 m) or less.■ Rigid metal vent is recommended. For best performance, donot use plastic or metal foil vent.■ Before making cutouts, make sure there is proper clearancewithin the wall or floor for the exhaust vent.■ Do not cut a joist or stud unless absolutely necessary. If ajoist or stud must be cut, then a supporting frame must beconstructed.■ The size of the vent should be uniform.■ The vent system must have a damper. If roof or wall cap has adamper, do not use damper supplied with the range hood.■ Use vent clamps to seal all joints in the vent system.■ Use caulking to seal exterior wall or roof opening around thecap.■ Determine which venting method is best for your application.For Best Performance:■ Use 26-gauge minimum galvanized or 25-gauge minimumaluminum metal vent. Poor quality pipe fittings can reduceairflow. Flexible metal vent is not recommended.NOTE: Local codes may require a heavier gauge material.■ Metal duct may be reduced to 30-gauge galvanized steel or26-gauge aluminized steel if allowed by local codes. Thisreduction is based on information in the InternationalResidential Codes Section M1601.1 (2006 edition).■ Do not install 2 elbows together.■ Use no more than three 90° elbows.■ If an elbow is used, install it as far away as possible from thehood’s vent motor exhaust opening.■ Make sure there is a minimum of 18" (45.7 cm) of straightvent between the elbows if more than one elbow is used.■ Elbows too close together can cause excess turbulence thatreduces airflow.■ Do not use a 5" (12.7 cm) elbow in a 6" (15.2 cm) or 3¹⁄₄" x 10"(8.3 x 25.4 cm) system.■ Do not reduce to a 5" (12.7 cm) system after using a6" (15.2 cm) or 3¹⁄₄" x 10" (8.3 x 25.4 cm) fittings.■ Avoid forming handmade crimps. Handmade crimps mayrestrict airflow.■ Use a Jenn-Air vent cap for proper performance. If analternate wall or roof cap is used, be certain the cap size isnot reduced and that it has a backdraft damper.■ Use vent clamps to seal all joints in the vent system.■ Use caulking to seal exterior wall or roof opening around thecap.The length of vent system and number of elbows should be keptto a minimum to provide efficient performance.The maximum equivalent length of the vent system is60 ft (18.3 m). For altitudes above 4,500 ft (1272 m), reducerecommended vent run by 20% for best performance.Cold Weather InstallationsAn additional backdraft damper should be installed to minimizebackward cold air flow and a thermal break installed to minimizeconduction of outside temperatures as part of the vent system.The damper should be on the cold air side of the thermal break.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.Venting MethodsCommon venting methods are shown for a downdraft range. Thedowndraft range may be vented through the wall or floor.Wall VentingFloor VentingVenting Between Floor JoistsA. Wall capB. 6" (15.2 cm) round roof ventingA. Wall capB. 6" (15.2 cm) round roof ventingABA B