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Should the power venter be 4 feet under a window, door, or gravity air inlet or should it be 4 feet under and 4 feet to the side of the same opening?

April 26, 2017air door feet gravity Inlet opening power venter window

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Should the power venter be 4 feet under a window, door, or gravity air inlet or should it be 4 feet under and 4 feet to the side of the same opening?

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This code requirement is interpreted differently depending on the State in which the job is located. Always check with local inspectors before installation. Also, even if the inspector allows 4 feet below a window with an oil-fired appliance, this may not be a good idea because of the likelihood of oil fumes drifting back into the window.