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Duct Sleeve

Intumescent Low Profile Ventilation Fire Duct Sleeve - CE Marked (155 mm diam)

Intumescent Low Profile Ventilation Fire Duct Sleeve - CE Marked (155 mm diam)

£60.41 £50.34 (ex. VAT)
Up to 120 minutes rating to EN 1366-3 : 2009 | Does not need metal sleeving | Easily fitted, requiring access from only one side | 155 mm diam. (internal height)


Key Points:
  • Astro DS Low Profile Duct Sleeve
  • Astroflame Low Profile Duct Sleeve - CE Marked.
  • Compact Duct Sleeve up to 120 minute rating to EN 1366-3 : 2009.
  • Uncapped / Uncapped (Open | Open) fire tested as required for ventilation systems.
  • Suitable for use through a wide range of fire partition walls.
  • Reduced profile - 10-15mm thickness - allows installation at any position in the wall, even tight to the floor slab, without removing the top side.
  • Does not need metal sleeving and is easily fitted, only requiring access from one side.
  • Sleeve can be slit to allow retrofitting.
  • CE Mark

The new Low Profile Duct Sleeve is a more compact version of the original Astro DS Duct Sleeve  and offers the same industry leading fire performance.

The Low Profile sleeves have been independently fire tested to BS EN 1366-3 in a full scale partition system with Uncapped/Uncapped pipe/duct end configuration as required for ventilation systems and assessed for use in series around multiple duct penetrations.

Low profile duct sleeves need no additional metal cage or sleeving, can be slit for retro fitting over ductwork and access is only required from one side.

The slim dimensions (typically 10-15mm thickness) and compressible nature of the intumescent material allows tight fitting against the ceiling soffit without the need to remove the top edge.


  • Available to fit common sizes of rectangular and circular plastic ventilation ducts.
  • Size: 155 mm diam. (internal height)


We have technical representatives who provide assistance in the selection and specification of the products on this site and should be consulted for exact installation and product suitability. Ensure an early engagement with ourselves, designers, main contractor and specialist installers before any installation. Other trades and/or manufacturers may need to be consulted. For in-depth information, specification and technical advice please call our Head Office on Tel: +(0)1329 841416 or email


All interested parties, designer, specifier, main contractor and specialist installers should provide access to allow the fire stopping seals to be regularly inspected and maintained, as well as records kept of such maintenance at minimum periods of 12 months, as required by the Regulatory Reform Order, and repaired if necessary. Reference should be made to ASFP TGD 17 – Code of Practice for the Installation and Inspection of Fire Stopping.


It is vital that those entrusted to design or install a fire stopping product have the necessary levels of competence to undertake the task professionally and thoroughly. The level of competency required will be commensurate with the expected complexity of the building. All designers must eliminate, reduce or control foreseeable risks that may arise during installation, construction or maintenance when preparing or modifying designs. Clients should ensure that the principal designer and principal contractor carry out their duties under CDM regulations. The ASFP foundation course in passive fire protection provides essential knowledge as part of demonstrating competency and understanding in this key fire protection specialism.

Additional Notes:

Please refer to the ETA sheet for fields of application for this product. For further information on installation requirements please refer to the duct manufacturer data and wall specification to ensure the compatibility of this product, if in doubt please contact the technical team with services and wall specification on Tel: +(0)1329 841416 or email

Download and review any of the following information:

Certification/Fire Test Reports:

CE InformationCE Marked Documents
'DoP's are 'Declaration of Performance'
'CoC's are 'Certificate of Constancy of Performance'
'ETA' European Technical Assessment Sheet

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