Intelmann® Aluflex Duct – flexible aluminium ventilation duct | Made in GermanyThe Intelmann® Aluflex Duct is a high-quality, flexible air duct made of aluminium for ventilation, air conditioning and exhaust applications. Manufactured Made in Germany, it stands for reliable quality, high durability and particularly installation-friendly processing. Thanks to its flexibility, the Aluflex duct is ideal for changes of direction, confined installation situations, and for connecting devices to fixed ventilation ducts.The material is non-combustible according to DIN 4102, class A1 and thus meets high requirements for structural fire protection. In addition, the Aluflex duct impresses with a very wide temperature resistance from −125 °C to +250 °C.Construction & MaterialThe Intelmann® Aluflex Duct is available in single-layer and double-layer versions and combines high flexibility with sufficient shape stability:✔ Material: Aluminium✔ 3 m version (single-layer): material thickness 80 µm✔ 5 m version (double-layer): material thickness 2 × 50 µm✔ Fire protection: DIN 4102, class A1 (non-combustible)✔ Temperature range: −125 °C to +250 °CImportant note on nominal diameterThe stated nominal diameter refers to the internal diameter of the Aluflex duct.The diameter range is Ø 50 – 400 mm.Connection is made via nipples, ensuring a precise fit with ventilation ducts, spigots and fittings of the same nominal diameter.Length, handling & processingThe Aluflex duct is delivered highly compressed and can be easily extended to the desired length:✔ 3 m version: compressed to approx. 0.6 m✔ 5 m version: compressed to approx. 1.2 m For optimal results, it is recommended to pull the duct apart with two people and in one continuous motion to reach the desired application length. Advantages at a glance:✅ Flexible & adaptable – ideal for complex duct routing✅ Made in Germany – high quality and manufacturing reliability✅ Non-combustible – DIN 4102, class A1✅ Wide temperature range – −125 °C to +250 °C✅ Wide diameter range – Ø 50 – 400 mm✅ Space-saving delivery – compressed for easy handling✅ Easy installation – quick assembly without special tools✅ Precise connection – nominal diameter = internal diameterInstallation:– Flexible installation for changes of direction– Connection to pipes, devices or spigots– Fixing, e.g. with hose clamps– Optional sealing with aluminium adhesive tape or sealantApplication & areas of use:The Aluflex duct is ideal for:– Ventilation and exhaust systems– Kitchen, bathroom and WC exhaust– Connection lines for ventilation units– Air conditioning and ventilation systems– Technical and ancillary roomsIt is equally suitable for new buildings and retrofitting.With the Intelmann® Aluflex Duct you receive a flexible, safe and proven solution for professional ventilation installations with high demands on fire protection, temperature resistance and installation convenience.

Intelmann® Aluflex Premium Aluminium Flexible Duct Ø 80–200 mm – 5 m, increased material thickness 120 µmThe Intelmann® Aluflex Premium (Intelmann FLEX) is the robust advancement of the classic aluminium flexible duct and has been specially developed for applications requiring higher stability combined with high flexibility. It is ideal for ventilation, air conditioning, and exhaust systems in residential, commercial, and industrial sectors.Thanks to the increased material thickness of 120 µm, the duct is significantly more resistant to mechanical influences and has a higher inherent stiffness without losing its flexibility. This facilitates installation and ensures a durable, secure setup.The duct is made entirely from spiral-wound aluminium and guarantees very high airtightness (airtightness class D) while optimally adapting to complex duct routes.Advantages at a glance:✅ Premium version – Significantly more stable than standard aluminium flexible ducts✅ Increased material thickness (120 µm) – Durable and shape-retaining✅ High airtightness – Airtightness class D✅ Flexible & adaptable – Ideal for complex installations✅ Wide temperature range – −30 °C to +250 °C✅ Non-combustible – Euroclass A1 according to EN 13501-1✅ VDI 6022 compliant – Suitable for hygienically sensitive applicationsTechnical details:✔ Product name: Intelmann® Aluflex Premium (FLEX)✔ Diameter: Ø 80 – 200 mm (internal diameter)✔ Length: 5 m (compressed to approx. 1.2 m)✔ Material: Aluminium✔ Material thickness: 120 µm✔ Airtightness class: D✔ Max. temperature: +250 °C✔ Min. temperature: −30 °C✔ Max. pressure: +3000 Pa✔ Max. negative pressure: −750 Pa✔ Max. air velocity: 30 m/s✔ Fire protection: EN 13501-1, class A1✔ Bending radius: min. 1 × diameter✔ Halogen-free: Yes✔ Silicone-free: YesInstallation & processing:The aluminium flexible duct is delivered compressed (approx. 1.2 m) and can be extended to the full length of 5 m.For optimal results, it is recommended to extend the duct with two people and in one continuous pull to the desired length.Installation is quick and easy:– Connection to ventilation spigots or duct systems– Fixing, e.g. with hose clamps– Optional sealing with aluminium adhesive tapeApplications & areas of use:The Intelmann® FLEX is particularly suitable for:– Ventilation and exhaust systems– Connection ducts for ventilation units– Kitchen, bathroom, and WC exhaust– Air conditioning and ventilation systems– Technical rooms and commercial installationsWith the Intelmann® Aluflex Premium, you receive a particularly stable, durable, and at the same time flexible solution for demanding ventilation installations with high requirements for airtightness, fire protection, and processing.