DucoFlex Insulated 45° bend with integrated coupler D125 – Insulated 45° ISO Duct Bend
In stock
DucoFlex Insulated 45° bend with integrated coupler D125
An insulated 45° bend with integrated coupler for outdoor air and exhaust duct runs.
DucoFlex is Duco’s complete air-distribution system for MEV and MVHR installations, from semi-rigid radial ducts to insulated ISO pipework, silencers and roof terminals.
Key figures: Diameter Ø125 mm · Angle 45° · Integrated coupler Yes
Why choose it
Technical specifications
New-build and renovation projects that need a fast, reliable and airtight ventilation duct network.
Genuine DUCO product supplied by PureClima. Not sure which components your system needs? Get in touch and our team will help you specify the right DUCO solution.
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DUCO – Innovative Ventilation Solutions for Healthy, Energy-Efficient Indoor Living
DUCO is a well-established European specialist in ventilation and solar shading solutions, dedicated to creating indoor environments that are healthy, comfortable, and highly energy efficient. Its innovative systems are designed to optimise natural air circulation, supporting improved indoor air quality in both residential and commercial spaces.
DUCO’s product portfolio, including advanced ventilation grilles and complete ventilation systems, focuses on delivering reliable airflow while minimising energy consumption. User wellbeing remains at the core of DUCO’s approach, with solutions such as the DucoBox Silent offering powerful yet exceptionally quiet ventilation, ensuring long-term comfort and performance within the home.
DUCO offers a range of products specifically designed to meet the requirements of passive house construction. These solutions are independently tested and certified by the Passive House Institute, confirming their suitability for high-performance, low-energy buildings.The DucoBox Energy Comfort Plus has received official certification for its exceptional heat recovery efficiency, applicable to both the D350 and D450 models, making it a reliable choice for energy-conscious residential projects.
DUCO – Belgian-made ventilation and sun control since 1991
DUCO Ventilation & Sun Control is a Belgian manufacturer founded in 1991 and still based in Veurne, West Flanders, on the E40 between Ostend and Calais. From there it has grown into one of Europe’s leading producers of natural ventilation, mechanical ventilation and solar shading systems.
Everything happens under DUCO’s own roof — product design, production and assembly, testing and dispatch — across an ultra-modern industrial site of 101,000 m² spread over two locations. That vertical integration is why the components fit together so precisely on site, and why DUCO has picked up international awards for innovation, management and export.
Ventilation and shading are treated as one problem, not two: fresh air in, unwanted solar heat out. The result is a healthy, comfortable, low-energy indoor climate in homes, apartments, offices, schools and care buildings.
Why the factory matters
DUCO oversees the whole chain itself, from the first design through to handover of the finished product. Nothing is badge-engineered from a third party, so the tolerances, acoustics and airflow figures quoted on a datasheet are the manufacturer’s own — and spare parts stay available years after installation.
That control over design and production is what allows for details like sound-absorbing window vents, the exceptionally quiet DucoBox Silent, and heat-recovery units such as the DucoBox Energy — products developed as one system rather than assembled from bought-in parts.
Short European supply lines also mean sensible lead times into the UK and Ireland — one reason we stock the range rather than a generic equivalent.
What DUCO manufactures
Window ventilation
- Standard trickle and window vents
- Sound-absorbing window vents
- Self-regulating and controllable models
- Ventilation through wall or sloping roof
Mechanical ventilation
- DucoBox units — MVHR, MEV and Silent
- Ventilation ducting and plenums
- Control components and air valves
- CO₂, humidity and user controls
Grilles and louvres
- DucoGrille Solid, Classic and Acoustic
- DucoGrille Close and NightVent
- DucoWall louvre walls and roof turrets
- DucoDoor louvre and grille doors
Sun control
- DucoSun C, CF, D and Ellips blades
- DucoSun Cubic, Linear and Wing
- DucoSlide SlimFrame and LuxFrame
- DucoSlide BiFold and QuadraFold panels
Pure Clima supplies the DUCO mechanical ventilation range in the UK, including units, ducting, controls, sensors and accessories — all genuine DUCO parts, manufactured in Veurne. Need a component that is not listed? Email sales@pureclima.co.uk and we will source it from the factory.
Pure Clima is an authorized UK distributor of Ventmann frameless diffusers and gypsum-based products.