Lindab OLC is an overflow unit designed to maintain a stable indoor climate by controlling air pressure. It prevents excessive pressure buildup or drops in ventilation systems, ensuring a comfortable and balanced environment. The OLC unit is suitable for various applications, including offices, schools, and residential buildings. It is easy to install, requiring a simple cutout dimension for integration into the ventilation system. The unit's compact design and durable construction make it a reliable choice for long-lasting performance.