Quick Answer Connects mismatched duct sizes across 150mm to 300mm transitions without turbulence or pressure loss. Tapered internal geometry keeps airflow efficient at the size change point. Best suited to growers whose fan, filter and ducting diameters don't already match. Available in 200 to 150mm, 250 to 200mm and 300 to 250mm configurations. Poly Duct Adapter Reducer. Hydroponic Ventilation Size Reducer for Grow Room Airflow Systems (150mm to 300mm) Poly Duct Adapter Reducers are designed to connect different duct sizes within hydroponic ventilation systems. These fittings enable seamless transitions between inline fans, carbon filters, and ducting, ensuring efficient airflow across mixed-diameter setups without turbulence or pressure loss. Designed for low-resistance air transfer, reducer adapters maintain airflow efficiency while allowing flexible system design in grow rooms and grow tents. Available in three size configurations covering 200mm to 150mm, 250mm to 200mm, and 300mm to 250mm transitions. Key Benefits Seamless duct size transitions with minimal restriction. Tapered internal geometry reduces turbulence at the size change point, maintaining airflow efficiency across mismatched duct diameters. Connects inline fans, carbon filters, and ducting of different sizes. Enables flexible system design where fan outlet, filter inlet, and ducting diameters do not match without requiring additional adapters or modifications. Rigid poly construction maintains shape under airflow pressure. Durable polymer body resists deformation and collapse in continuous ventilation applications, ensuring consistent airflow geometry over time. Three size configurations for standard grow room transitions. 200-150mm, 250-200mm, and 300-250mm variants cover the most common duct size mismatches in hydroponic ventilation systems. Direct compatibility with standard ducting and fittings. Standard duct sizing ensures immediate compatibility with flexible ducting, inline fans, Y connectors, and carbon filters without modification. Ventilation Performance in Hydroponic Systems Size transition. Connects mismatched duct diameters efficiently, enabling flexible ventilation system design without performance compromise. Airflow continuity. Maintains smooth airflow with minimal restriction across the size change point for consistent inline fan output. System flexibility. Enables scalable ventilation configurations where different components use different duct diameters. Pressure efficiency. Tapered internal profile reduces turbulence between size changes, minimising static pressure loss at the transition point. Broad compatibility. Suitable for inline fans, carbon filters, Y connectors, and flexible ducting across all standard hydroponic ventilation configurations. Available Size Configurations 200mm to 150mm reducer. Transitions a 200mm duct or fan outlet down to a 150mm ducting run or carbon filter inlet. 250mm to 200mm reducer. Transitions a 250mm duct or fan outlet down to a 200mm ducting run or filter connection. 300mm to 250mm reducer. Large-diameter transition for commercial grow room ventilation systems connecting 300mm and 250mm duct components. Applications Poly duct adapter reducer for hydroponic grow room ventilation size transitions Australia Duct reducer fitting for inline fan and carbon filter connections in grow tent systems Ventilation size reducer for mixed-diameter ducting configurations in indoor cultivation HVAC duct size transition fitting for controlled environment agriculture systems Grow room airflow adapter for connecting mismatched fan, filter, and ducting diameters Ideal For Hydroponic grow room ventilation. Enables efficient connection of inline fans, carbon filters, and ducting of different diameters without airflow restriction or system modification. Grow tent airflow systems. Compact reducer fittings suit all standard grow tent ventilation configurations where fan and filter duct sizes differ. Inline fan and carbon filter connections. Bridges size differences between fan outlets and filter inlets for direct, low-resistance connection without additional adapters. HVAC duct size transitions. Suitable for broader ventilation system applications beyond hydroponics where duct diameter changes are required. Technical Specifications Type. Duct adapter reducer Material. Rigid polymer (poly) construction Available Sizes. 200-150mm, 250-200mm, 300-250mm Application. Hydroponic ventilation, grow room airflow, HVAC duct size transitions Compatibility. Standard flexible ducting, inline fans, carbon filters, Y connectors HS Code. 391790 Frequently Asked Questions What size do I need for Poly Duct Adapter Reducer? Ducting and ventilation fittings are sized by internal diameter in millimetres (100mm, 125mm, 150mm, 200mm). Always match your fittings to your fan and filter flange size. Standard grow tent setups use 100mm or 125mm ducting for small tents and 150mm or 200mm for larger tents running higher-output fans and carbon filters. What material should my ducting be made from? For most indoor growing applications, flexible aluminium ducting is the standard choice, it is lightweight, easy to route around obstacles, and resistant to the humidity levels found in grow tents. Acoustic or insulated ducting is recommended if noise reduction is a priority. Rigid ducting offers lower airflow resistance but is more complex to install. Does Poly Duct Adapter Reducer ship fast within Australia? Yes, Poly Duct Adapter Reducer ships from within Australia with fast tracked delivery Australia-wide. Most east coast orders arrive within 2 to 5 business days. WA, NT, and TAS orders typically arrive within 5 to 12 business days.
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