Astroflame Passive Fire Protection Products

Trade Name: Astro Acoustic Vent Sleeve

Fire Rated Vent Sleeve

A fire rated Vent Sleeve for ventilation ducts.

Restores and maintains integrity of 30 & 60 minute fire rated ceilings.

Provides an effective acoustic barrier between fan / vent and ceiling.

Easy to retro fit into existing fans / vents.

Lightweight and can be fitted from above or below the ceiling.

Invisible once fan / vent is fitted.

Various sizes available.

Astro Acoustic Vent Sleeve at Astroflame

View a range of styles

>> See more : Additional product images

>> Call us to order: 01329 844 500

>> Email us to order:


Recessed ceiling fans and ventilation ducts are widely used in both domestic and commercial buildings and the use of forced / controlled ventilation is increasing because it can be more energy efficient than traditional ventilation methods.

Centralised ventilation units and heat recovery units result in a building having both horizontal and vertical penetration holes through the structure, creating pathways for the passage of fire and smoke. Once a hole is made in the ceiling for a polymeric fan or vent, the integrity of the construction and its ability to perform in a fire is reduced significantly.

Ceilings subject to fire regulations must be fire protected in accordance with Approved Document B of the Building Regulations. Any vent opening must be fire stopped to reinstate the original fire rating of the ceiling.

Unlike down lights, which are generally all fire protected, fans and vents are often left unprotected.

A 100mm diameter fan or vent has several times the open area of a down light and lacks a metal “can” to slow the spread of fire. This, coupled with the ability of the fire to move all around the building via the ventilation system, makes it ever more important to fire protect ceiling mounted fans and vents.

Product Availability

All sizes - 10 per pack

Product Code

Product Description


Cut out Required


Astro Acoustic Vent Sleeve 80




Astro Acoustic Vent Sleeve 100




Astro Acoustic Vent Sleeve 125




Astro Acoustic Vent Sleeve 150



To Order & Specify

Please contact us and quote the following - Quantity / Product Code / Product Description / Size
Typical example:- 10 / AFAVS100 / Astro Acoustic Vent Sleeve 100 / 100mm

>> Tel: 01329 844 500 or >> Email:

Test and Assessment Reports

Tested to the principles of BS 476 part 20
30 Minute Plasterboard / Timber Ceiling
Duration of effective protection - 36 minutes
60 Minute Plasterboard / Timber Ceiling
Duration of effective protection - 72 minutes


For further information on installation requirements please review the installation video or contact the technical team on: tel 01329 844 500 or email

Health and Safety

The product does not present any known health hazards during or after installation. Normal good industrial and personal hygiene practices should be observed. For further information on health and safety requirements please contact the technical team on: tel 01329 844 500 or email


Astroflame (Fire Seals) Ltd. Intumescent House
Unit 8, The IO Centre, Stephenson Road, Segensworth
tel 0800 023 2482
(01329 844500)
fax 0800 023 2483
(01329 844600)
tel +44 1329 844500
fax +44 1329 844600



Email Astroflame