Dairy ventilation
As dairy facilities have increased in size and cows’ milk production has increased, which results in more heat generated, dairymen are looking for different options to ventilate barns.
“Generally, cows do quite well in a range of temperatures from 40 to 70 degrees,” “But cows become heat stressed at lower temperatures than humans are bothered by heat.”
In addition, the veterinarian noted, a cow that produces 120 pounds of milk will produce twice as much heat as a cow that is producing 40 pounds of milk.
With naturally-ventilated buildings, air enters through the eaves, is warmed by the animals and leaves through the ridge.
“That flow of air requires adequate interior roof slope of a minimum 1 in 4 slope,” the doctor said. “When the wind blows, that will assist that air flow by creating negative pressure around the ridge and helping draw the air out of the barn.”
As the dairy industry has expanded and dairymen have added cows to their herds, they also have built additional barns.
“That single barn on top of the hill that did us quite well with natural ventilation is challenged when we build multiple facilities because the barn down downwind will provide a shadow to the next barn,”
As dairy facilities have increased in size and cows’ milk production has increased, which results in more heat generated, dairymen are looking for different options to ventilate barns.
“Generally, cows do quite well in a range of temperatures from 40 to 70 degrees,” “But cows become heat stressed at lower temperatures than humans are bothered by heat.”
In addition, the veterinarian noted, a cow that produces 120 pounds of milk will produce twice as much heat as a cow that is producing 40 pounds of milk.
With naturally-ventilated buildings, air enters through the eaves, is warmed by the animals and leaves through the ridge.
“That flow of air requires adequate interior roof slope of a minimum 1 in 4 slope,” the doctor said. “When the wind blows, that will assist that air flow by creating negative pressure around the ridge and helping draw the air out of the barn.”
As the dairy industry has expanded and dairymen have added cows to their herds, they also have built additional barns.
“That single barn on top of the hill that did us quite well with natural ventilation is challenged when we build multiple facilities because the barn down downwind will provide a shadow to the next barn,”
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