Stay ahead of heat stress this season with Multifan AirBreeze
26th February 2026
Heat stress has become a growing challenge for dairy farmers worldwide. Rising temperatures combined with high humidity levels can significantly impact cow health and productivity. The result is lower milk yields, reduced fertility rates, and increased health risks. Effective cow cooling is no longer a luxury; it is a necessity.
Spring is the right time to act. While extreme heat may still seem months away, the effects of heat stress begin earlier than many realise. Preparing your barn now ensures cows remain productive and healthy when temperatures rise in late spring and summer.
That is exactly why Vostermans Ventilation developed the Multifan AirBreeze, a powerful and targeted solution designed to improve cow comfort and protect performance even during the hottest days.
Real impact of heat stress
Heat stress is not caused by temperature alone. Humidity plays a crucial role in how effectively cows can release body heat. To measure this combined effect, researchers use the Temperature Humidity Index (THI), which integrates temperature and relative humidity into one value.
The chart shows how quickly the THI increases when both factors rise. At 22 degrees Celsius and 50 percent humidity, the THI already reaches 68, the point where milk production begins to decline.
According to research from the University of Wisconsin, milk production starts to decrease once the THI exceeds 68. At a THI of 75, a cow can lose around 1.1 litres of milk per day after eight hours of exposure. Heat stress during the dry period can even reduce milk production in the next lactation by up to 5 litres per day.
In addition to lower milk yield, higher temperature and humidity reduce feed intake, increase respiration rates, and raise the risk of lameness and fertility problems. Without effective cooling and proper airflow, the impact is felt across the entire farm operation.
Without an effective cooling strategy, the consequences affect the entire operation, from daily production levels to long-term farm performance and profitability.
Multifan AirBreeze: The ultimate answer to heat stress
The Multifan AirBreeze is specifically engineered to address these challenges. Designed with the cow as the starting point, it creates a stable and healthy barn climate by delivering consistent airflow exactly where it is needed.
By generating a minimum air speed of 2 metres per second at cow level, the Multifan AirBreeze actively removes excess body heat. This supports feed intake, stabilises milk production, and reduces stress during periods of high temperature and humidity.
Farmers can choose between two configurations to match their barn layout and performance goals.
One version is optimised for maximum cooling reach. It effectively moves air across areas up to 18 by 5 metres, making it ideal for larger barns and reducing the number of fans required.
The second configuration focuses on energy efficiency. It delivers optimised airflow performance while maintaining low power consumption, helping farmers manage operational costs without compromising cooling effectiveness.
This flexibility allows dairy farmers to implement a solution tailored to their specific barn environment.
Built for long-term reliability
A comfortable barn climate is essential for healthy and productive cows. The Multifan AirBreeze is built with durability and reliability in mind. It is designed to withstand dust, moisture, and fluctuating temperatures commonly found in dairy environments.
The robust construction ensures long-term performance with minimal maintenance requirements. This makes the Multifan AirBreeze not just a cooling solution but a long-term investment in dairy farm success.
Spring preparation makes difference
Waiting until cows visibly struggle with heat stress can lead to avoidable production losses. Spring offers the perfect opportunity to prepare your ventilation strategy before peak temperatures arrive.
Inspecting, optimising, and, if necessary, upgrading your ventilation system now ensures that airflow is consistent and effective when it matters most. Early preparation reduces risk, stabilises production, and protects overall animal health throughout the warmer months.
Beyond summer: Year-round climate control
Ventilation is not only important during summer. Poor air circulation in winter can lead to stagnant air zones, condensation, damp bedding, and respiratory problems.
The Multifan AirBreeze, supported by ECplus and Vplus technology, allows fans to operate at lower speeds during colder conditions. This prevents moisture buildup while saving energy, ensuring healthy air quality throughout the year.
Effective ventilation is therefore a continuous strategy rather than a seasonal adjustment.
Prepare before heat strikes
By preparing your barn this spring and investing in reliable airflow with the Multifan AirBreeze, you create a stable environment that supports cow comfort and performance.
Now is the time to act before temperatures rise.
Learn more about the Multifan AirBreeze and how it can improve your dairy barn.
Watch the Multifan AirBreeze product video.
Read more Farm Tech news.
