® Microwave Hood Combination OVERALL DIMENSIONS PRODUCT MODEL NUMBERS MH3184XP MH3185XP Electrical: A 120-volt, 60 Hz, AC-only, 15 or 20 amp electrical supply located in the upper cabinet as close as possible to the microwave oven hood. A time-delay fuse or circuit breaker and separate circuit is recommended. 17-1/8" (43.5 cm) 15-7/8" (40.3 cm) 15-3/8" (39.1 cm) 29-7/8" (75.9 cm) CABINET OPENING DIMENSIONS Space between cabinets must be 30" (76.2 cm) minimum and be free of obstructions. For 36" (91.4 cm) and 42" (106.7 cm) openings, accessory kits are available from your dealer. 12" min. to 14" max. (30.5 to 35.6 cm) cabinet depth NOTE: There must be at least one 2" x 4" (50.8 cm x 101.6 cm) wall stud and minimum 3/8" (9.5 mm) thickness drywall or 66" (167.6 cm) plaster/lathe within cabinet opening. Must minimum from be able to support 150 floor to top of wall mounting lbs. (68 kg). plate. 30" (76.2 cm) from bottom edge of upper cabinet frame or, if frameless, from cabinet's exterior bottom surface to cooking surface. VENTING REQUIREMENTS Roof venting roof cap Wall venting wall cap 3-1/4" x 10" (9.5 cm x 25.4 cm) through-the-roof 3-1/4" x 10" (9.5 cm x 25.4 cm) through-the-wall Recommended vent length Use 3-1/4" x 10" (9.5 cm x 25.4 cm) rectangular or 6" (15.2 cm) round vent. The total length of the vent system including straight vent, elbow(s), transitions, wall or roof caps must not exceed the equivalent of 140 feet (42.7 m) of 3-1/4" x 10" (9.5 cm x 25.4 cm) rectangular or 6" (15.2 cm) round vent. For best performance, use no more than three 90° elbows. To calculate the length of system you need, add the equivalent feet for each vent piece used in the system. See examples below. 3-1/4" x 10" (9.5 cm x 25.4 cm) vent system 3-1/4" x 10" 90° elbow 6 ft. (1.8 m) wall cap Recommended standard fittings 3-1/4" x 10" to 6" = 5 ft. 3-1/4" x 10" roof cap = 24 ft. 3-1/4" x 10" 90° elbow = 25 ft. 90° elbow 6" = 10 ft. 3-1/4" x 10" wall cap = 40 ft. 45° elbow 6" = 5 ft. 3-1/4" x 10" flat elbow = 10 ft. For wall or roof venting methods: If the wall exhaust method is chosen, be sure that there is proper clearance within the wall for the damper to fully open. Wall and roof caps must have back-draft damper. We recommend: using rigid metal vent. that length of vent and number of elbows should be kept to a minimum to provide efficient performance. that size of vent should be uniform. using duct tape to seal all joints in the vent system. using caulking compound to seal exterior wall or roof opening around cap. two elbows should not be installed together. We do NOT recommend: flexible metal vent. NOTE: If flexible metal vent must be used, calculate each foot of flexible metal vent as two feet of rigid metal vent. Flexible metal elbows count twice as much as standard elbows. 2 ft. (0.6 m) 1 - 3-1/4" x 10" 90° elbow 1 - wall cap 8 feet straight Length of 3-1/4" x 10" system = 25 ft. (7.6 m) = 40 ft. (12.2 m) = 8 ft. (2.4 m) = 73 ft. (22.2 m) 6" (15.2 cm) vent system 90° elbows 6 ft. (1.8 m) If the existing vent is round, a rectangularto-round adapter must be used and a rectangular 3" (7.6 cm) extension vent between the damper assembly and the adapter must be installed to prevent sticking of the exhaust damper. 2 ft. (0.6 m) 1 2 1 8 - transition - 90° elbows - wall cap feet straight = = = = 5 ft. (1.5 m) 20 ft. (6.1 m) 40 ft. (12.2 m) 8 ft. (2.4 m) Length of 6" system = 73 ft. (22.2 m) transition Because Whirlpool Corporation policy includes a continuous commitment to improve our products, we reserve the right to change materials and specifications without notice. Dimensions are for planning purposes only. For complete details, see Installation Instructions packed with product. Specifications subject to change without notice. Ref. 8206327 05-30-06 ...