The VK 150 EC is Vents-US’s 6-inch inline centrifugal fan powered by an energy‑efficient electronically commutated (EC) motor for variable‑speed control. Built for supply or exhaust ventilation in round duct systems, it uses a backward‑curved impeller inside a durable ABS plastic housing and includes a mounting bracket for flexible installation. On 120 V/60 Hz, the VK 150 EC delivers up to 333 CFM at 0 in. w.g. (about 566 m³/h) with a sound rating of 3.8 sones, and supports 0–10 V control to maintain performance as static pressure increases. Typical applications include general air exchange where higher pressure capability is required. The model connects to standard 150 mm (6-inch) ducts and can also accommodate 160 mm ducts with suitable adapters.