Ventur’s JETLINE-250 is a metal in-line centrifugal duct fan for general ventilation systems. It uses a single‑phase AC motor (IP44, insulation class F) and ships with a mounting bracket and junction box. The JETLINE-250 connects to 245 mm round ducts and delivers a maximum free‑air volume of 1279 m³/h, with up to 550 Pa static pressure when regulated. The impeller, guide vanes and outlet diffuser are injection‑molded plastic inside a galvanized steel housing. Typical applications include supply or extract ventilation. A gasket is provided at inlet and outlet to damp vibration and ensure a tight fit.