Reference	Characteristic	Description
Turbine	Typology	- Horizontal-axis machines - Vertical-axis machines single-blade, bi-blade, tri-blade (the choice is irrelevant, it depends on the geographical context; it is important that the same wind area will adopt the same machine type to avoid visual disturbances)
	Size	Diameter: max 90 m
	Power	(cf. Table 1)
	Colour	Better neutral colours and opaque: light grey, beige, cream, but it is important that they are integrated in the environment and that they comply aeronautical provisions.
Tower	Typology	- wind pole - pylon
	Height	max 80 - 100 m
	Width
	Colour	Better neutral colours and opaque: light grey, beige, cream, but it is important that they are integrated in the context.
	Density (distance between the blades and between plants)	- Concentration rather than dispersion: homogeneous groups of plants are preferable to individual machines scattered throughout the territory. (It is less the visual impact of a smaller number of larger turbines that a greater number of smaller turbines). The minimum distance between wind turbines is suggested 3 - 5 times the diameter of the rotor in the same row and 5 - 7 times the diameter of parallel rows (Guidelines for the planning and siting of renewable energy plant, Puglia Region) - To place the machines in groups of no more than eight turbines with a relatively large distance between them (Danish Guidelines for the design of windfarms) - German guidelines for the design of the windfarms provide more than 5 km between wind plants
	Distance from the town	buffer of 1000 m for large wind farm and 500 m for small wind farm, both for reasons of perception than urban planning (production areas are not considered because suitable for the location of wind generators)
	Distance from vegetation	buffer of 200 m
	Distance from coast	- buffer of 300 m from wind farm of any size and number of wind turbines (except industrial and port areas, to be regulated in an appropriate way) - buffer of 2 km from power wind farm with more than 1 MW
	Distance from restricted areas	buffer of 500 m
Infrastructure and Services	Electrical substation	It is preferable to use the existing substations, to reduce their number in the area It is clear that this often leads to a lengthening of the electric transmission lines
	Access roads	It is preferable to use the existing road network and if necessary to adapt it to the requirements of transport, construction and maintenance. It is important, finally, paved roads with permeable surfaces (macadam or similar)
	Power transmission lines and substations	The distance from the network of high and medium voltage is of fundamental importance to avoid problems of over-infrastructure of the territory. The distance between layout and connection point must not be greater than 8 km. Furthermore, to ensure a low impact underground electrical power grid lines is preferred, alongside the existing road network, in accordance with local regulations
	Service/Disposal	- it must be guaranteed a constant access to the site - in the case of decommissioning of the wind farm (the operating life is approximatively thirty years), it is necessary to restore the area, ensuring the original use
Noise		the noise coming from a generator must be inferior to 45 dB near houses (value equivalent to a quietly conversation)