VK 125 is a 5-inch inline centrifugal duct fan from Vents‑US’s VK Series, built for continuous ventilation in residential and light‑commercial duct runs. It uses a backward‑curved centrifugal impeller driven by a sealed external‑rotor AC motor with thermal protection and long‑life bearings. The plastic housing is UV‑resistant (UL94 5VA) and includes an adjustable mounting bracket. At free air, VK 125 delivers up to 235 CFM (about 399 m³/h) and is rated at approximately 7.1 sones, 114 W, 120 V/60 Hz. The unit is designed for 125 mm (5 in) round duct connections and can be mounted in any orientation. Typical uses include duct boosting, and general supply or extract applications where higher static pressure performance is needed.
