100mm to 150mm ABS Vent Reducer

A compact, high-integrity round duct reducer sized precisely from 100mm to 150mm, made exclusively from new ABS plastic. This material offers superior hardness versus standard PP or PE duct components, along with excellent resistance to corrosion, impact, and thermal distortion — making it ideal for demanding UK ventilation environments. The unit is formed in a single moulding operation, delivering uniform wall thickness, perfect concentricity, and zero seam-related leakage paths. Its aerodynamically shaped internal profile ensures laminar airflow transition, while the external surface is finished for clean visual integration into ceiling voids, utility cupboards or plant rooms. Installation requires no special tools: rigid ducts connect with putty or foil tape; flexible ducts are secured using a standard 150mm hose clamp — tightened manually or with a screwdriver. Validated across core UK ventilation applications: bathroom extractor fans (including timer and humidity-sensing models), kitchen extraction hoods (ducted only), condenser dryer exhausts, hydroponic air delivery, inline duct fans, passive stack ventilation terminals, fresh air inlets for heat recovery systems, and ducted air-to-air heat pumps — suitable for both new builds and refurbishment projects meeting current NHBC and LABC guidance.