• RS 40-20 M Sileo Rectangular Duct Fan– 400x200mm, Backward-Curved Blades, 925 m³/h, 230 V, 107 W, Galvanised Steel, Maintenance-Free
  • RS 40-20 M Sileo Rectangular Duct Fan– 400x200mm, Backward-Curved Blades, 925 m³/h, 230 V, 107 W, Galvanised Steel, Maintenance-Free
  • RS 40-20 M Sileo Rectangular Duct Fan– 400x200mm, Backward-Curved Blades, 925 m³/h, 230 V, 107 W, Galvanised Steel, Maintenance-Free
  • RS 40-20 M Sileo Rectangular Duct Fan– 400x200mm, Backward-Curved Blades, 925 m³/h, 230 V, 107 W, Galvanised Steel, Maintenance-Free
  • RS 40-20 M Sileo Rectangular Duct Fan– 400x200mm, Backward-Curved Blades, 925 m³/h, 230 V, 107 W, Galvanised Steel, Maintenance-Free
  • RS 40-20 M Sileo Rectangular Duct Fan– 400x200mm, Backward-Curved Blades, 925 m³/h, 230 V, 107 W, Galvanised Steel, Maintenance-Free

RS 40-20 M Sileo Rectangular Duct Fan– 400x200mm, Backward-Curved Blades, 925 m³/h, 230 V, 107 W, Galvanised Steel, Maintenance-Free

Regular price £467.96
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Description
  • High Efficiency & Quiet Operation: Backward-curved impeller blades provide maximum airflow of 925 m³/h with minimal noise (47.2 dB(A)).
  • Durable & Safe: Galvanised steel casing with integral thermal contacts and electrical reset protects the motor from overheating.
  • Easy Maintenance: Motor and impeller are mounted on the access cover for quick and simple servicing.
  • Versatile Installation: Can be installed in any position; compatible with DS flexible connections.
  • Speed-Controlled & Reliable: 230 V, 107 W external rotor motor ensures smooth operation and long-lasting performance.

The RS 40-20 M Sileo rectangular duct fan is designed for efficient and quiet ventilation in residential, commercial, or industrial spaces. Featuring backward-curved impellers and a maintenance-free external rotor motor, this fan delivers a maximum airflow of 925 m³/h while ensuring low noise operation at just 47.2 dB(A). The motor and impeller are mounted on the access cover for easy servicing, and the fan includes integral thermal contacts with electrical reset to protect against overheating. Its galvanised steel casing ensures durability, and it can be installed in any position with flexible DS connections for seamless integration. With speed-controllable operation, reliable performance, and compact design, this fan is ideal for a wide range of ventilation needs.


  • Product Code: 77285
  • Voltage: 230 V, 50 Hz, Single Phase
  • Power: 107 W
  • Max Airflow: 0.257 m³/s (925 m³/h)
  • Motor Type: External rotor, maintenance-free
  • Impeller Type: Backward-curved blades
  • Sound Level: 47.2 dB(A) at 3 m
  • Dimensions: 400 × 200 mm (Rectangular)
  • Weight: 10.7 kg
  • Max Air Temperature: 70 °C
  • Insulation Class: B
  • Enclosure Class: IP54
  • Material: Galvanised steel
  • Colour: Silver/Galvanised

Delivery time: 3-5 working days.


Your purchase includes a 1-year Veralis warranty, offering complete assurance in the quality and longevity of your product. From internal components to craftsmanship and performance, every part of your device is protected. Should you experience any issue during everyday use, our dedicated support team will provide quick and reliable assistance, ensuring you receive a seamless solution with minimal disruption to your comfort.



  • Whisper-Quiet Operation

    Enjoy cleaner air and consistent comfort without any distracting noise.

  • Precision Airflow Engineering

    Enjoy clean, balanced comfort throughout your space.

  • Smart Energy Optimisation

    Our systems automatically adjust their output when needed

  • Built For Modern Living

    Beautiful to look at, effortless to use, and engineered to last.

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