Koenders Windmills RE-Defines CFM of AIR for Windmill Aeration!!

When you are evaluating aeration systems for your water, its important that you are aware of the fact that many of the standards and stats that a manufacturer promotes does not necessarily have any relevance on performance.

A perfect example of this is “CFM”, A common performance measurement that aeration manufacturers like to promote (known as maximum cubic feet per minute of air).

CFM is a bench tested measurement that means very little in the windmill aeration industry. When your windmill aeration system is installed out in the field by your pond it is totally reliant on wind to produce oxygen for your water, hence, giving the consumer a maximum CFM rating is not relevant at all to performance. In fact its almost useless, the higher the winds the more CFM of air the lower the winds the lower the CFM. As a result, Koenders Windmills commissioned a study to help consumers better understand this measurement and in the process created a new indicator for consumers to evaluate and choose a windmill aeration system.


It computes this measurement for windy, moderate and low wind scenarios so that consumers have an accurate assessment of the performance of the various windmill aeration systems given their location. At an average height of 15 -20 FT these windmill aeration systems “need to work in low winds”.

Below is a video that was provided to us showing a Koenders Windmill Aeration System operating in a low 5 MPH wind speed at a Fish Farm in Turkey. Further illustrating the tremendous airflow that these Koenders Windmills generate in lows winds.

The windmill is generating the bottom up oxygen bubbles that you see coming up in two areas of the pond. In the beside it is a surface bubbler that moves water, resulting in low oxygen transfer rates and high energy costs because its pushing water instead of air. A wonderful video to show Koenders Windmill performance.

For more information visit www.koenderswindmills.com

Interested in purchasing a pond aeration system?  You might want to read this first!

Pond aeration is the process of adding oxygen to water in order to increase oxygen levels and avoid stagnation.  it helps in reducing fish kill and improves the overall health of your fish and pond water.   Aeration systems are critical if the pond is being used to water cattle or horses or being used for any other form of farming or recreational use.  

If you are in the market for a product to aerate your pond, aeration windmills have consistently been a great tool to aid farmers and pond owners in tackling the issues caused by stagnation and nutrient pollution in their waters. There are numerous choices on the market when it comes to picking a windmill so we thought we would point you in the direction of yet another resource that might help you decide which product or brand is best suited for your needs.

The only study that we have seen comparing different compressor designs is available for download at Koenders Water Solutions. They review 4 different windmill aeration designs and name Koenders compressors specifically in the study due to the fact they own so much of the current market share, estimated at 85-90%.

This technical document has been written in a way that consumers can understand and explains how manufacturers use technical specifications on advertising documents that mislead potential customers on actual product performance. It gets to the bottom of what these specifications really mean to you and your pond!

The study tested a single diaphragm compressor, a balcam compressor, a double diaphragm compressor, and a bellows compressor at different depths of water and wind speeds. The results focused on cubic feet per month of air being produced, instead of cubic feet per minute.  Cubic feet per minute is merely a bench tested result and cubic feet per month is what a windmill aeration system will actually produce in the field; a metric that is as close to reality as possible and which seems to be a much better indicator of performance. In the field, you have wind speeds to calculate performance but also pond depth which yields a corresponding PSI of back pressure rating.

Interested in what the study has to say? To request a copy, follow the link koenderswatersolutions.com/windmillanalysisstudy.aspx or visit koenderswatersolutions.com.