The VK 250 is a 10-inch (250 mm) inline centrifugal duct fan from Vents-US’s VK Series, molded in UV-resistant 5VA plastic. It features a backward-curved impeller and a sealed external-rotor motor with thermal protection and long-life bearings to sustain airflow through long duct runs and higher static pressure systems. On 120 V/60 Hz, the VK 250 is listed at 293 W with a sound rating of 10.2 sones. Maximum free-air performance is 735 CFM, approximately 1,250 m³/h. Each unit ships pre-wired with a power cord and includes an adjustable mounting bracket for flexible installation at any point along the duct. The 10-inch (nominal 250 mm) connection suits whole-house boosts, workshops, and grow-room exhaust applications.