Koenders Windmill

Height: 12 Foot Tower

No power? No problem!

Powered solely by wind, windmills provide top-to-bottom aeration without any electrical service. Mounted on land, the spinning fan generates pressure within a diaphragm compressor and pumps air into the pond in a similar form to an electrical compressor system.

Windmill Kits

The galvanized steel windmill kit comes in 12’, 16’, and 20’ tall towers. All tower heights include the same 1.5 CFM diaphragm compressor, 12-blade 65” diameter fan assembly and tail, 100’ of ⅜" poly airline, 100' of ⅜" weighted airline, 7” diameter air diffuser with a check valve, pressure relief valve and complete assembly instructions.  12 month warranty.

The height of your windmill should be chosen based on the surrounding vegetation and landscape. In areas of few trees and flat landscapes, shorter windmills can be used more effectively. In cases where there is a lot of tree cover or hills, a taller windmill should be used. 

Extra lengths of air line can be added up to 500’, in order to locate the tower farther from the pond if necessary, in the interest of catching ideal wind conditions but for long runs air line size should be increased.

Sizing Your Pond

Aeration is most efficient in deep water, therefore your air diffuser stone should be placed in the deepest, most central location in your pond. The exception to this rule is if you have trout, in which case, during the warm summer months the diffuser should be at half depth. Depending on the depth of your diffuser, a windmill with one diffuser stone can aerate up to 1½ acres.

Aerated surface area dependant on depth

Optional equipment:

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