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Charcoal filters will not remove odors if washed and should be replaced periodically—every few months depending on usage. Replacement filters are available from the manufacturer. Please call 800-875-3654. CONNECTING TO THE VENT PIPE: The hood is equipped with a metal damper. Attach the damper to the hood top or back side of the hood with at least two screws. Duct tape the edges to the hood. Be careful to not damage or tape over the damper blade. When connected to the back of the hood (horziontal