DucoFlex Insulated circular duct with integrated coupler D200 L1000 mm – Insulated ISO Duct 1 m
In stock
DucoFlex Insulated circular duct with integrated coupler D200 L1000 mm
A lightweight insulated duct section for the cold ODA and EHA lines of an MVHR system.
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 Ø200 mm · Length 1000 mm · 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.
Continuous extraction, demand-controlled comfort
With DUCO ventilation units, the basis is laid for an optimal indoor climate thanks to continuous exhaust of stale and/or humid air. With the addition of demand control, a high level of comfort is achieved — the unit only works as hard as the rooms actually need it to.
A DUCO system is modular. Start with the unit, add the ducting, then the valves, sensors and controls that suit the building. Everything below is made by DUCO and available through Pure Clima.
Ventilation units
Units with and without heat recovery, from the compact DucoBox Silent and Focus to the Energy Comfort Plus and Energy Premium MVHR range.
DucoFlex air ducting
A complete air distribution system for MEV and MVHR alike — semi-rigid radial duct, insulated ISO pipework, plenums, silencers and roof or wall terminals.
Control components
Modular parts that let each system be assembled around the building: control valves, CO₂ and humidity sensors, and wired or RF user controllers.
Air valves
Exhaust vents fitted into the outlet duct to draw off stale and moist air, including the flush, frameless DucoVent Design.
Intelligent control valve
The straightforward answer to common exhaust in high-rise and multiple-dwelling buildings, student accommodation, schools and offices.
Feed-through vents
A neat door vent that keeps air moving freely between rooms, so extraction works properly without gaps cut under the doors.
Zonal ventilation with DUCO
Smart, energy-efficient and low-noise ventilation comes from a ventilation box with demand and zone control. Internal or external control valves work together with CO₂ and humidity sensors to detect where and how much ventilation is needed, so every room or zone is ventilated fully automatically.
The result is fewer running hours, less noise and lower energy use — without anyone having to touch a switch.
- Room-by-room demand control on CO₂ and humidity
- Quiet running — the DucoBox Silent is built for bedrooms and flats
- Heat recovery on MVHR units keeps warmth inside the building
- Duco Connectivity app for commissioning, reports and software updates
- Accessories and spares for the whole system from one supplier
Pure Clima is an authorized UK distributor of Ventmann frameless diffusers and gypsum-based products.

