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Heat stress for cows begins at around 20 °C and leads to lower fertility due to metabolic stress. Feed intake is reduced by 10 to 20%, resulting in lower milk yield. Cooling inside the dairy cattle building is important for the well-being of the animals. An efficient high-pressure cooling system is capable of increasing the animals’ performance. It can be installed above the walkway and/or in the waiting area, wetting of the animals is avoided.