The Elta 019‑0450-STD is a 450mm flanged damper designed to prevent air from flowing backward when the fan is off, ensuring efficient ventilation system performance. It is fixed directly to the fan case flange for a secure and easy installation. Constructed from hot dip galvanised steel, the damper provides excellent corrosion resistance and durability. The unit includes galvanised steel butterfly-type blades that operate reliably to maintain proper airflow direction. Suitable for both horizontal and vertical (upward airflow) mounting, this damper is versatile for various ventilation setups.