Additional Development Standards for Air Conditioning, Heating, Cooling and Other Roof-Mounted Equipment in Residential Zones. If the air conditioning, heating, cooling or other equipment is located in the Agriculture-Single Family Residential (A-1) Zone, Single-Family Residential (R-1) Zone, or the Multiple Residential (M-R) Zone, it shall not be roof-mounted as part of any new construction of a residential structure. Such equipment may be roof-mounted on a pre-existing residential structure if it is located, designed and installed so as to minimize its visibility from any public or private street or adjoining property.