The Base for Flat Roof Size 450/500 is designed to provide a sturdy platform for mounting HR roof units on flat roof surfaces. It ensures proper alignment and secure installation of ventilation equipment, supporting consistent airflow and optimal system performance. Suitable for commercial and industrial applications, this base simplifies installation while offering durability and long-term reliability. It helps maintain the stability of the HR roof unit, ensuring dependable and efficient operation of the ventilation system in various building environments.