There are a number of variables with windmill towers. There are four legged towers and three legged towers offered by a number of vendors. A few even have a uni-pole or single pole option (very useful in public areas where children may want to climb up a lattice tower)

Cell, hydro and antenna towers that support hundreds of pounds are formed in both 3 legged and 4 legged models mostly to avoid patent infringements or to differentiate one brand from another. There does not seem to be any advantage in strength over either one. The one area that is of much interest to consumers is the convenience of installing and servicing the windmill head once installed. Thus, a tiltable tower option seems to be a huge asset to the manufacturers that offer this feature. Variety is also important. How many tower heights are available with each manufacturer seems to be quite important to the marketplace.

If you are locating your windmill in an extremely windy location than a shorter tower height is applicable. The less wind the location offers the higher the tower should be- this allows the windmill head to pick up more wind and thus compress more air into the airline. Another consideration needs to be the trees and brush that is around the area that you would like to locate your windmill. If you do have trees and brush then you may want to go with a higher tower height.

Last consideration that should be taken into account when determining the height of your tower is SNOW. For customers that are located in the colder regions and who receive snow levels ranging from a few inches to many feet per/year. You may want to consider the higher height towers.