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The termination point for exhaust ducts discharging to the out-of-doors shall be located with the following minimum distances.
1. For ducts conveying explosive or flammable vapors, fumes or dusts: 30 feet (9144 mm) from the property line;10 feet (3048 mm) from openings into the building; 6 feet (18829 mm) from exterior walls and roofs; 30 feet (9144 mm) from combustible walls and openings into the building which are in the direction of the exhaust discharge; 10 feet (3048 mm) above adjoining grade.
2. For environmental air duct exhaust: 3 feet (914 mm) from the property line; 3 feet (914 mm) from openings into the building.
3. For environmental air duct exhaust 3 feet (914 mm) from the property line; 3 feet (914 mm) from openings into the building.