Extractor fans and ventilation ducting are widely used in domestic and commercial building and are often installed in the ceiling. Ceilings are subject to fire regulations and must be fire protected in accordance with Approved Document B of the Building Regulations.
Once a hole is made in the ceiling for the installation of a thermoplastic fan or vent, the integrity of the ceiling for the installation of a thermoplastic fan or vent, the integrity of the ceiling and its ability to perform in the event of a fire is significantly reduced. To reinstate the original fire rating of the ceiling a suitable fire stop must be fitted.
The popularity of forced and controlled ventilation is increasing as it can be much more energy efficient than traditional ventilation methods. The use of centralised ventilation units and heat recovery units result in the building being subject to penetration holes through the structure, creating pathways for the passage of both fire and smoke. The ability of the fire to move all around the building via the ventilation system make it ever more important to protect all ceiling mounted fans and vents.
30 minute plasterboard / timber ceiling
Duration of effective protection - 36 minutes
Test Standard - BS476 Part 21
Test No - Chilt/IF06015
60 minute plasterboard / timber ceiling
Duration of effective protection - 72 minutes
Test Standard - BS476 Part 21
Test No - Chilt/IF06021
|Alternative Product Code||DUCQRS100|
|Product Category||Fire Rated|
|Round System (mm)||100|
|Product Type||Fire Cuff|
|Product Group||Plastic Ducting|
|Packaged Weight (Kg)||0.049|
|Packaged Length (mm)||138|
|Packaged Width (mm)||35|
|Packaged Height (mm)||138|
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I am trying to connect the 100mm flexi inside the 110mm roof tile vent tube?
Thank you for your question. We do a 100mm - 110mm adapter that may do you application. The product code for this item is. QS3584. If I can help any further please do not hesitate to contact me on 0208 463 9683.
System 100 End (Male - connects into System 100 straight ducting DUCVKC250):
Outer Diameter: 98mm
Inner Diameter: 95mm
System 110 End (Usually Female dependant on manufacturer - connects over 110mm OD straight pipe):
Outer Diameter: 113mm
Inner Diameter: 110mm
I'm replacing a bathroom fan that is connected to a common vertical ventilation duct constructed in blockwork. Would the Fire Cuff be appropriate for this location?
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|Ducting System||Actual dimensions (mm)||Space requirements (mm)||Airflow mm²|
For 4" (100mm) extractor fans or for low power cooker hoods up to 250m³/hour
|System 100 - Round||100||106||7,854|
|System 100 - Rectangular||110 x 54||116 x 60||5,940|
For medium extraction rates or if available depth is limited up to 500m³/hour
|System 125 - Round||125||131||12,272|
|System 125 - Rectangular||150 x 70||156 x 76||10,500|
For 6" (150mm) extractor fans or for high power cooker hoods up to 500m³/hour & above
|Megaduct 220 - Rectangular||220 x 90||227 x 97||17,968|
|System 204 - Rectangular||204 x 60||210 x 66||12,240|
|System 150 - Round||150||156||17,671|
|System 150 - Rectangular||180 x 90||186 x 96||16,200|
For a shallow space, such as ceiling voids or under floor, where high extraction rates are not needed:
|System 300 - Rectangular||308 x 29||314 x 35||8,932|
|System 225 - Rectangular||234 x 29||240 x 35||6,786|
| System 100 |
| System 125|
| System 150|
|System 204||System 225|
|System 220||System 300|
|Actual Dimensions (mm) Space Requirements (mm)|