The Planning Commission may grant a special land use permit for the following uses in any district, except as herein qualified:

b. Wind energy system, building-mounted structures. The intent of this section is to ensure that building-mounted wind energy systems are constructed and placed in a manner which will protect the public health, safety and welfare and where visual impact is minimized. Building-mounted wind energy systems may exceed the 20 feet above the height limitation of the district if all of the following requirements are met: