Pond Boss Forums AERATION Systems questions Koenders 3 CFM in 5mph winds

It is probably possible for the Koenders windmill to create some air volume maybe 3cfm with a 5mph wind. However this will only happen when the diffuser is in very shallow water or in no water thus no head pressure is required. Thus the statement is not a complete lie. This is because the air pressure needed is a lot less in real shallow water compared to a diffuser set in 10-12 ft or deeper water. Wind speed determines how much pressure the windmill diaphragm can create. The stronger the wind and faster the wheel turns the more psi it can create and the deeper the windmill can push air. Then as the wind speed increases more air volume is created and increases and more bubbles occur due to a 'harder' pumping action.. So the deeper you set the diffuser the more wind speed is needed to get enough pressure to release a little air at that depth; more speed then adds more air. Pressure needed rule is - 0.5psi for each one foot of water depth. 1ft depth requires 0.5psi = "easy peasy". 5ft depth requires 2.5psi and 12ft depth requires 6psi, and 20ft depth requires 10psi. Also note that as the diaphragm ages and gets 'weak' and stretched or cracked the more wind speed is needed to generate the same pressure as a new diaphragm. I like the electric air compressor because it always or constantly produces lots of air volume at most all depths although it also has its limits based on the type of compressor and psi ability at each depth.