Venting Microwave Through Roof

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Venting microwave through roof.

I have a range that is located against an outside brick wall in a one story kitchen with a flat roof. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. The top vented microwave example given assumes that the vent runs straight up through the roof see the roof cap in the sketch above. How to vent a range hood through the roof kitchen range hood vented through roof.

You would need to know what your local codes call for to use an existing chimney. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. It appears when this house was built provision was made for venting out the rear of the microwave into the standard 2 4 wall up the cavity inside the wall then up through duct work in the attic through the roof. I would like to use that path to vent a new microwave.

Microwaves are shipped from the factory to vent out the top vertically but can also be vented out the rear horizontally. I want to vent to the outside. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. This product is intended to vent an appliance through a asphalt shingle roof.

Both smaller and larger vents than recommended decrease venting performance. An externally vented microwave mounted over a cooktop uses a fan to draw air through the microwave s vents and into an exhaust duct leading to the exterior of the building so most of the moisture heat odor and particulate matter generated by cooking goes directly outside. If you have any other inquiries about our master flow products please call technical services at 800 211 9612. But an alternative worth considering if it does not make the vent run too long is to vent across the attic floor and down and out through a soffit or out through a gable end wall.