Semi Flexible Sound Attenuator Ducting

For use with Titon HRV Q Plus MVHR range 

Semi-Flexible Sound Attenuator DuctingTiton’s Semi Flexible Sound Attenuators consist of a heavy multiple layered corrugated perforated aluminium inner duct with an aluminium/polyester laminated outer jacket.

The space between the inner and outer duct is filled with 25mm sound absorbing material which is protected by a vaper barrier. The duct is fitted with galvanised metal sleeves at both ends to fit to duct work - Female spigots for direct connection to MVHR’s or duct connectors.

Our Semi Flexible Sound Attenuators fulfil all the requirements and are classified as specified within E13180: Ventilation for buildings – Duct work - Dimensions and mechanical requirements for flexible ducts.

Features & Benefits

  • Designed for Titon’s MVHR range
  • Easy to fit and install
  • Semi flexible self supporting ducting, minimises airflow resistance 
  • Fulfils EN 13180: Ventilation for buildings - Duct work
  • Flexibility in shape and length, assists quick and tidy installations
  • Reduces both duct and breakout sound levels
  • Provides both acoustic and thermal insulation
  • Isolates unit to ducting to help prevent noise transmission through vibrations.



Semi-Flexible Sound Attenuator Ducting

Semi-Flexible Sound Attenuator Ducting




Drawing and Dimensions

Semi Flexible Sound Attenuators - Drawing and Dimensions


Sound Attenuation

Semi Flexible Sound Attenuators - Sound Attenuation


Pressure Loss


Product Codes

89720 125mm Ø Flexible Silencer 0.5m length F-F

89721 125mm Ø Flexible Silencer 1.0m length F-F

89722 150mm Ø Flexible Silencer 0.5m length F-F

89723 150mm Ø Flexible Silencer 1.0m length F-F


Inner Duct: Aluminium

Barrier: Nonwoven Cloth

Glass Wool Blanket: 25mm, 16kg/m³

Outer Jacket: Alu/Poly Laminate

R-value Glass Wool: 0.65m² K/W

Thermal Conductivity: 0.0385w/(m.k)

Appearance: Aluminium


Temperature Range:
   Inner Duct: -30°C to 250°C
   Outer Jacket: -30°C to 140°C

Operating Pressure: up to +2000 Pa

Operating Air Velocity: max. 10m/s

Min. bending radius: 1 x Ø + 25mm

Standard length: 0.5 & 1.0 metres

Other diameters available to order.


EU (EN 13501-1):

Inner Duct: A1

Outer Jacket: B-s1,d0 mode

More information / 01206 713800