O’Kelley Mfg has developed the most innovative product to assist the ventilation industry in the past 50 years. The development of the wind diverter , for the first time since the electric motor driven fan, allows its ability to be predictable. Fans are developed and tested in resistant free chambers. Fan companies say they only test their product in these areas to prove the accuracy of their fans. This is a must to have some kind of a standard.

Every person in the fan industry agrees that to test in a actual on the farm condition has proven to be very expensive and without a standard of test equipment at this time would prove to be flawed. With this knowledge we must rely on commonsense to guide us in the rights and wrongs being used in the industry today.

Every one of us know of the problems caused by the wind, we all have seen the fan slowed , stopped or even to turn backwards. This is a common problem and service no advantage in a ventilation system. Only the electric provider can produce a profit from this condition. If the fans had not intended to exhaust, there would be no reason to install them or pay electric bills.

So you say how does the diverter assist with these problems? Studies done of the wind directed into open front of a can reduce exhaust a 15mph wind. Fan companies say they try to identify the area as the engineer each project and increase the number of fans to fit each unit, adding extra cfm per unit to cover the loss by the wind. The only problem with this is when the wind is 30 mph and the exhaust is all but stopped, how many extra fans do you need?


The O’Kelley wind diverter is the only diverter that protects the fan from both the head and side winds. Designed to exhaust predictably 24/7.

Test work performed in actual conditions has shown a tremendous advantage in the use of the wind diverter. The test preformed on fans facing the north wind at 18mph showed the amperage draw on each leg of the cone fan to be 1.4/1.5/1.4. The unit with a wind diverter had a amperage draw of 1.1/1.1/1.1, all fans tested were of same brand type and motor. The amperage draw was used as a meter of fan production, we know a wind stressed fan will cost more to operate. Although we had no method or meter to measure the exhaust on the farm the amperage draw should be a meter for exhaust. If the past test work indicating a 15 mph wind will reduce the exhaust by 50% and 18 mph should be in relation. Producers know their facilities are not working properly when bedding fails to stay dry and the air becomes heavy for our own body to breath/ Studies on humidity refer to the % of humidity and added case problems created as the % of humidity rises. Salmonella and ecoli has been identified in extensive tests to increase rapidly and follow the % of humidity increase. With these bacterial diseases being harbored in the facility have a greater chance of a out break.

From the early days of school we were taught that we could feed all the feed, supply all the water in the animal they need but nothing becomes available to the animal until the oxygen carries it into the blood stream. Why have we ignored the most important factor of growth “oxygen”? I suggest the biggest reason until the development of the O’Kelley wind diverter , there was no answer to the problem and without the ability to fix the problem it was just sold around.

The biggest misconception developed in the past many years is the us of the cone attached to the outer end of the fan. Test work on the cone in the test chamber free of any wind or resistance confirms the cone will produce 5 to 6% more exhaust for the same amperage draw. Even in the test work, amperage draw is related to cfm of exhaust. With the story of the cone being sold by most all fan companies as a standard of ventilation we know the cone has no standard . The length of the cone has no standard size, the angels of the opening has no standard size, the exhaust rate has no standard % of gain and with this information a cone was produced. We know both the angle and length alter the results of the exhaust but when asked why the length or width of the cone, the answer has been cost of material or transportation, not that this is the very best angle and length. I have never been told of any fan company doing test or advertising a test done outside the test chamber. In fact I have been told “we do no on the farm test.” We know the cone will help increase exhaust in the test chamber or when the wind is blowing the same direction as the fan . The cone is referred as a cone looking from the inside the fan to the outside. Going outside and looking into the fan it must be referred to as a funnel. As the wind turns from the other directions be it head or side wind the cone becomes a funnel and we also know the large end of a funnel will allow us to put more through the small end. 5 to 6% free exhaust has been the trend in ventilation sales but no one selling that idea has told the user that at a 18mph wind he would pay.3 amp higher

Electric bill and loose 50% of his exhaust. Using the wind diverter allows the producer to reduce the total number of fans used in the winter, spring and fall seasons and gain a higher predictable exhaust rate in the summer.

The wind diverter not only protects the fan from head and side winds and produces a better exhaust but it also protects the fan and shutters from damage often created by the wind blowing back into the fan while it is shut down. Less maintenance, labor, fan belts, motors, and fan blades frozen to the fan housing are some of the advantages of using the O’Kelley wind diverter.

Not all producers a plagued with urban sprawl. But those that have and know the problems enjoy knowing there is help. Fans that have been allowed to exhaust direct discharge into the wind creates a channeling effect and carry the odor in that air stream two or three miles before braking down to acceptable parts per million reading. The diverter has become very important in helping this problem. First thing we must know that the odor is carried on a dust particle be it feed or animal dandruff. The diverter allows a large amount of these particles to be forced to the ground after it has stopped the channeling affect. Other producers have found the diverter to work as a muffler for noise where neighbors lives close.

Producing a predictable exhaust for producers 24/7 that have used the diverter has become a standard for them From the first the development was to control the wind from blowing into the fan both from the side and head winds. Other wind diverters have been manufactured by other companies for years but have failed to protect the fan only from one direction , if the wind only blows from one direction , these will help, if not why buy only half a wind diverter.

Many agriculture business use fans for ventilation including dairy, swine, poultry, and greenhouses. None are exempt from the wind.

From the first sales of the diverter, producers returned new knowledge of the use of the diverter. The first blizzard, a man reported the old cliché that the diverter was the best thing since the wheel. After him, reports were of the reducing the cost of gas and electricity , the ability to manage the environment and allow the interior of the facility to become stable, and removing the temperature change caused by the wind blowing into the fans. Comments were dryer litter in turkey buildings. A green house tells they saved enough money on their gas bill to pay for the diverters the first year. Pork producers have better growth on small pigs. Layers laying better in time of temperature changes, and a layer house manager tells he can pay for the diverters on his savings of brooms he used. Now he doesn’t have to beat the frozen ice off his fans and his buildings are ventilated.


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