The Elta STDL315-1EC‑R is a 315mm twin centrifugal box fan developed for efficient and quiet air handling. It is part of a series of seven standard sizes ranging from 125mm to 500mm. This unit delivers airflow rates of up to 1.740 m³/s and static pressures up to 730 Pa. Suitable for operating temperatures up to +60°C, it features a redesigned casing that enhances airflow performance and reduces specific fan power. The fan includes an auto changeover panel and is internally lined with acoustic insulation to minimize breakout noise. Optional spigot types are available for greater installation flexibility. The STDL315-1EC‑R combines energy efficiency with reliable ventilation performance.