How to Vent an Over-the-Range Microwave to the Outside
By: Danny Lipford
Many times an over-the-range microwave that recirculates cooking fumes can be converted to exhaust to the outside. Here’s how to go about it:
- Remove the access plate on the top of the unit in order to reach the motor. Remove the motor mounting screws on the back of the oven.
- Take out the motor and rotate it 90 degrees, so that the fan motor now blows upward.
- Attach the transition piece to connect the oven to ductwork
- Modify the cabinet over the stove to allow the duct to pass through by cutting holes on the top and bottom.
- Use a laser measuring tool to mark a dot on the ceiling that will identify the center of the hole that needs to be cut for the ductwork.
- Join the sections of ductwork and seal the joints with metallic tape to secure them.
- In the attic mark a spot directly above the duct so you can cut a hole in the roof decking and extend the vent pipe up through that opening.
- On the roof tuck the flange of a roof vent under the shingles above the opening and secure it with roofing tacks and roofing sealant.
- To hide the exposed duct in the kitchen, build a frame around it and cover it with cabinet grade plywood. Cover the exposed edges of the plywood with corner trim.
- Apply a coat of primer and two coats of the wall paint.
Watch the video for details.
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