Overview The Airex XC-125 is a 5-inch metal centrifugal inline duct fan in light grey, designed for 125mm ducting — the in-between size that bridges 4-inch residential and 6-inch commercial duct sizes. The centrifugal impeller spins at 2650 RPM to deliver 288 CFM (490 m³/h) at 295 Pa of static pressure. Construction & Materials Round metal scroll housing in light grey with forward-curved centrifugal impeller visible inside the duct chamber. Black plastic junction box on the side houses electrical terminals. Single steel mounting foot for wall, ceiling or duct frame mounting. Operates on 220-240V single-phase mains at 50Hz, drawing 65W at full speed. Noise output 47dB. Rated for operating environments of -10°C to +50°C. Applications Residential and light-commercial extraction where 4-inch ducting is too restrictive but 6-inch is unnecessary. Common in apartment kitchen retrofits, larger bathroom ventilation, mid-size grow tents (1×1m), and home workshops. Centrifugal design handles bends and short carbon filters better than axial alternatives. Installation Notes Mounts horizontally or vertically along the duct run. Can be suspended with rope-ratchet hangers in grow rooms or screw-mounted to walls or ceilings. Compatible with 5-inch (125mm) flexible or rigid ducting on inlet and outlet.