Circular Duct Attenuator 1200mm Long – Spigoted Silencer 100mm to 560mm
Circular duct attenuators, also known as silencers, reduce fan noise travelling along spiral ductwork. This 1200mm long version gives the greatest attenuation in the range. The spiral-wound galvanised casing contains a perforated inner tube and 50mm of scrim-faced acoustic media, with spigot ends to fit standard spiral duct.
Key features
- 1200mm long body for maximum attenuation
- Galvanised spiral casing made to DW144
- Perforated inner bore with 50mm 45kg/m3 acoustic infill
- Spigot ends fit directly into spiral duct
- 13 diameters from 100mm to 560mm
Shorter 300mm, 600mm and 900mm versions are also available.
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Specifications
Specifications
Compact and lightweight design
With a low weight of just 21 kg, this ventilation unit can be installed quickly and safely by a single installer. Its space-saving footprint makes the DucoBox Energy Comfort perfectly suited for small plant rooms and confined technical areas.
Software-controlled left/right configuration
The unit is designed for maximum installation flexibility. Left- or right-hand airflow orientation is adjusted entirely via software, eliminating the need for mechanical modifications. This is made possible by an innovative patented double bypass system.
Automatic calibration
Using constant pressure calibration technology, the AUTO calibration function reduces commissioning time by up to 50%. In real-world installations, this can translate into lower labour costs and faster system setup.
High energy efficiency
Advanced dynamic air filtration ensures consistently high heat recovery efficiency. When combined with optional intelligent demand control based on CO₂ and humidity sensors, the system delivers excellent indoor air quality while minimising energy consumption.
Smart copy function for fast commissioning
An integrated software-level copy feature allows installers to duplicate settings and parameters from one unit to another. This is especially valuable for multi-unit or repeated housing projects, ensuring consistent performance and significantly reducing setup time.
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Pure Clima is an authorized UK distributor of Ventmann frameless diffusers and gypsum-based products.

