How do French casement windows improve airflow compared to sliding or fixed windows?

French casement windows enhance airflow because their sashes can be fully opened and angled to capture wind direction—unlike sliding windows which often expose only partial openings. Casements act like scoops, allowing architects in Casablanca or Aqaba to direct breezes into deeper rooms or to create stack ventilation when combined with upper vents. Their tight seals when closed also mean airflow is predictable when open, improving cross-ventilation effectiveness without compromising airtightness when shut. Fixed windows provide daylight but no ventilation; sliding windows ventilate more modestly and can be limiting for directional control. For low-energy strategies in Middle East homes, using French casement windows on opposing façades or paired with clerestories promotes continuous airflow cycles that cool interiors efficiently during early mornings and evenings while limiting daytime heat gain with external shading. Properly detailed aluminum profiles ensure smooth operation even after repeated cycling in sandy coastal climates.