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Are there any special considerations for air sealing a range hood duct that is vented to an exterior wall?

Josef Chalat | Posted in General Questions on

Are there any special considerations for air sealing a duct that exhausts a range hood to the exterior? Do you think an external fan mounted on the wall is preferable to the fan mounted in the hood. How do you prevent cold air from entering the house through the duct during the winter?

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