Section 106 Guidelines: City of St Louis
	Vents To the extent possible, vents should be located in their original location on historic structures. If additional vents are needed, they should be placed to the rear or side of a building where they will not detract from its appearance. Venting for furnaces, dryers, plumbing stacks etc. should use existing vertical shafts whenever possible; in any case, vents should not be installed on facades or roof slopes where they will be visible from the street.
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