Whirlpool MH3184XPS5 Venting Design Specifications, Rectangular to Round Transition

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VENTING DESIGN SPECIFICATIONS

This section is intended for architectural designer and builder/contractor reference only.

NOTES:

Vent materials needed for installation are not provided with microwave hood.

We do not recommend using a flexible metal vent.

To avoid possible product damage, be sure to vent air outside, unless using recirculation installation. Do not vent exhaust air into concealed spaces, such as spaces within walls or ceilings, attics, crawl spaces or garages.

For optimal venting installation, we recommend:

using roof or wall caps that have back draft dampers

using a rigid metal vent

using the most direct route by minimizing the length of the vent and number of elbows to provide efficient performance

using uniformly sized vents

using duct tape to seal all joints in the vent system

using caulking compound to seal exterior wall or roof opening around cap

not installing 2 elbows together, for optimal hood performance

If venting through the wall, be sure that there is proper clearance within the wall for the damper to open fully.

If venting through the roof, and rectangular to round transition is used, be sure there is at least 3" (7.6 cm) of clearance between the top of the microwave oven and the transition piece. See “Rectangular to Round Transition” illustration.

Rectangular to Round Transition

NOTE: The minimum 3" (7.6 cm) clearance must exist between the top of the microwave oven and the rectangular to round transition piece so that the damper can open freely and fully.

A

B

C

D

 

 

E

3" (7.6 cm)

F

A. Roof cap

B. 6" (15.2 cm) min. diameter round vent C. Elbow (for wall venting only)

D. Wall cap

E. 3¹⁄₄" x 10" to 6" (8.3 x 25.4 cm to 15.2 cm) rectangular to round transition piece

F. Vent extension piece, at least 3" (7.6 cm) high

Recommended Standard Fittings

The following length equivalents are for use when figuring vent length. See the examples in “Recommended Vent Length.”

ABC

Roof venting

Roof cap

Wall venting

Wall cap

DEFG

A. Rectangular to round transition piece: 3¹⁄₄" x 10" to 6" = 5 ft (8.3 x 25.4 cm to 15.2 cm = 1.5 m)

B. Roof cap: 3¹⁄₄" x 10" = 24 ft (8.3 x 25.4 cm = 7.3 m)

C. 90° elbow: 3¹₄ " x 10" = 25 ft (8.3 x 25.4 cm = 7.6 m)

D. 90° elbow: 6" = 10 ft (15.2 cm = 3 m)

E. Wall cap: 3¹⁄₄" x 10" = 40 ft (8.3 x 25.4 cm = 12.2 m)

F. 45° elbow: 6" = 5 ft (15.2 cm = 1.5 m)

G. 90° flat elbow: 3¹⁄₄" x 10" = 10 ft (8.3 x 25.4 cm = 3 m)

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Contents Microwave Hood Combination Safety Microwave Hood Combination Installation InstructionsLocationRequirements Installation RequirementsToolsandParts RemoveCardboardTemplateRequired ProductDimensionsInstallation Dimensions ElectricalRequirementsRotateBlowerMotor Installation InstructionsWall Venting Installation Only RemoveMountingPlateCD E Roof Venting Installation OnlyWall Stud at One End Hole Wall Studs at Both End Holes Possible Wall Stud ConfigurationsLocateWallStuds No Wall Studs at End HolesDrillHolesinRearWall Installation for No Wall Studs at End Holes Figures 1MarkRearWall PrepareUpperCabinet AttachMountingPlatetoWallInstalltheMicrowaveOven InstallDamperAssemblyCompleteInstallation Recommended Standard Fittings Venting Design SpecificationsFor optimal venting installation, we recommend Rectangular to Round Transition¹⁄₄ x 10 8.3 x 25.4 cm vent system = 73 ft 22.2 m total ReplacementPartsAccessories Assistance