Our Attenuators have guaranteed performance, as nobody assesses against ISO 7235:2009 in a UKAS accredited facility like we have.

All for a quiet life

Our attenuators reduce noise produced by fan units and other equipment within heating, ventilating and air conditioning (HVAC) systems. Generally mounted within the system’s ductwork, they ensure that a specific noise criteria is achieved within the internal or external areas served. Our comprehensive range offers solutions for rectangular and circular ductwork or products can be specifically designed for installation within apertures and restricted spaces. UKAS accredited testing of our attenuators means we can guarantee the noise reduction performance of any unit. The range is backed up with free attenuator selection software to download.


Lining attenuators for smaller applications
Splitter attenuators for medium applications
Modular attenuators for larger applications
Element attenuators for installation within apertures
Circular attenuators for circular duct or plant applications
Bend attenuators for applications with limited space
Free attenuator selector software available on request

Being comfortable and reducing energy consumption

The Whole House Ventilation attenuator from Caice offers a reliable and cost effective method of reducing noise in a domestic ventilation system to help compliance with Part F of The Building Regulations. This product is also suitable for use in commercial applications such as schools or offices. For installations using circular ductwork, we are also able to offer attenuators from our CG or PG range to suit duct sizes from 100mm to 500mm diameter, with nominal 50mm wall thickness.Please refer to our attenuator product page and brochure for more details, or contact a member of our sales team.


Reduces noise transmission from MVHR appliances, and can also be used to control cross-talk between rooms. Suitable for both domestic and commercial applications.
Aids compliance with Approved Documents F of the Building Regulations.
Reliable acoustic performance data.
Sizes compatible with 204×60 and 220×90 plastic ductwork.
Various lengths available.
Low height facilitates installation within ceiling and floor voids.
Robust galvanised steel construction, resistant to corrosion.
Polyester powder paint finish available.

As expert manufacturers of attenuation and noise control solutions we have created the most diverse product range on the market today, with our industrial attenuator variant perfectly suited to tunnel ventilation applications.

Through our team of experts we are able to offer a turnkey solution for you.

Encompassing acoustic survey, technical design, structural design, project management & manufacture, ensuring every element of your project is covered.

Our past and current work portfolio demonstrates our ability to fully resource and deliver on the largest and most prestigious of global tunnel ventilation projects


  • Acoustic expertise
    Survey and acoustic consultancy
  • Technical design
    Designed to meet your noise requirements
  • Modular design
    Lifting points for crane distribution and loading, for easy handling and access restrictions
  • Years of low maintenance operation
    Robust construction for a long life span
  • Reversible airflow
    With separate bullnose fairings for both ends of the splitters
  • Off site manufacture
    Efficient, cost effective and safe
  • Accredited performance
    UKAS accredited testing for insertion loss data to BS EN ISO 7235:2009
  • Easy installation for authorised personnel
    Detailed drawings and installation method taking account of restrictions to each site
  • Authorised for use
    Included in the London Underground Approved Product Register
  • Relevant project experience
    Over 25 years of current and past projects
  • Proactive project management
    Our professional project managers liaise with you throughout

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