You can adjust your available space and the power available from the different turbines. The bigger and larger the turbines, the more cost effective, in general. One has to take installation costs into account. Our wind turbines perform more efficiently in a cluster effect.
Here is a table about the way to locate the different sizes, in general:
|Large (6 meters high)||Land or very strong roof|
|Medium (3 meters high)||Land or strong roof|
|Mini (1 meters high)||Land or regular roof|