Post by Bausch+Ströbel

First Air conditions in Annex 1 are no longer just a requirement. They must be demonstrable and defensible. With CFD studies, they become virtually verifiable already in the design phase. 🔍   For Engineering and Operations teams, this fundamentally changes the approach. Product protection is no longer something you confirm at the end. It must be engineered from the very beginning.   A key requirement is the proven maintenance of First Air conditions in product-adjacent areas during aseptic filling and closing. This is exactly where CFD (Computational Fluid Dynamics) becomes a powerful enabler.   By simulating airflow around filling needles, stoppering, and closing stations, CFD provides a detailed understanding of airflow behavior in critical zones. It enables early identification of turbulence, verifies unidirectional airflow towards the product, and shows how machine design, barrier systems, or pressure zones directly impact product protection.   The difference is when you use it. Many approaches still rely on late-stage verification. We bring CFD expertise in-house and apply it already in the design and planning phase. This allows critical areas to be identified and optimized long before installation, reducing risk, avoiding costly redesigns, and creating a robust foundation for Annex 1 compliance. ⚙️   The outcome: ✅Robust, simulation-based evidence for First Air conditions ✅Faster and smoother qualification phases ✅ Increased confidence in front of regulatory authorities   Annex 1 compliance doesn’t start in the cleanroom. It starts on the drawing board. 🧠   Learn more about our Annex 1 solutions on our website or get in touch with our experts, and meet us at interpack (May 7–13), Hall 16, Booth #D15.