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Alu-Dec 203 mm 3 meter
The Alu-Dec 203 mm is the largest flexible aluminium duct in our 3-meter range, engineered for high-capacity ventilation. This diameter moves large volumes of air quickly and is ideal for professional grow rooms, large workshops, light industrial extraction and storage facility ventilation. Robust, heat-resistant and straightforward to install. Shop now at plantandflower.be with fast delivery across Belgium.
Alu-Dec 203 mm flexible aluminium duct – 3 meters
For ventilation projects where airflow is everything, the Alu-Dec 203 mm is the top option in our 3-meter lineup. Pair it with a 200 mm inline fan and a Can-Lite 425 carbon filter for a complete high-performance extraction system.
Maximum airflow, minimum resistance
At 203 mm, this duct provides over 2.5 times the cross-sectional area of a standard 127 mm hose. That means your fan encounters less back-pressure, operates more quietly and exchanges air faster. It is the go-to diameter for multi-light grow rooms, woodworking shops producing sawdust, welding bays requiring fume extraction, and warehouses or storage areas that need constant air renewal.
Working with large-diameter ducting
A 203 mm duct is stiffer than its smaller counterparts. Plan your route in advance and use wide, sweeping bends rather than tight angles. Where noise reduction matters, switch to the Sono-Connect 203 mm with built-in sound insulation. Running longer than 3 meters? The 10-meter Alu-Dec 203 mm eliminates the need for joints.
Order your Alu-Dec 203 mm duct from plantandflower.be – fast shipping throughout Belgium.
How does 203 mm ducting compare to 160 mm for a large grow room?
A 203 mm duct offers roughly 60% more airflow capacity than a 160 mm duct. For grow rooms running multiple high-wattage lights, this extra capacity keeps temperatures stable and allows your fan to run at lower speeds, reducing both noise and energy consumption.