CVAB/T-N ECOWATT is Ventur’s sound-insulated in-line cabinet fan series with high‑efficiency EC motors for general ventilation. The housing is galvanized steel with a 25 mm fireproof acoustic fiberglass liner to reduce noise. Backward‑curved centrifugal impellers are used: aluminum for CVAB‑N and steel for CVAT‑N. CVAB‑N models use single‑phase 230 V motors, while CVAT‑N models use three‑phase 230/400 V motors; protection class is IP55 with insulation class F, and speed can be controlled via 0–10 V. The range covers circular duct connections from Ø250 to Ø560 mm and achieves up to 12,809 m³/h maximum airflow, depending on size. Typical applications include offices, shops, restaurants, schools, studios, libraries and industrial kitchens.