Safe metal ducting contains rubber seals while standard metal ducting does not.
Call us 020 8463 9696
Bathroom zones are just a way of telling which extractor fan you can install in a specific place.
* Usually £200+vat+ Order before noon for Next Working Day Delivery for items in stockExcludes Highlands, Islands, and Certain Postcodes.
Please Note: Ducting tubes over 200mm in diameter and 3 metres in length may incur additional shipping charges.
See the full delivery information here: Full delivery information
FIRE BLOCK - INTUMESCENT - ROUND - 100MMUp to one hour fire resistance.Slimline construction - only 40mm thick. Free area in excess of 50%.Low maintenance - no moving parts.Introduction Tecfire intumescent dampers (air transfer grilles) have been designed and are manufactured to prevent the spread of fire through ducts or apertures in fire resistin...
(0) Questions | (0) Answers | Ask a Question
FIRE BLOCK - INTUMESCENT - ROUND - 100MM
Introduction Tecfire intumescent dampers (air transfer grilles) have been designed and are manufactured to prevent the spread of fire through ducts or apertures in fire resisting elements such as partitions and doors.
Tecfire dampers are produced from PVC slats filled with a high performance intumescent material which are assembled to form a matrix. In the event of a fire the slats and framing components swell to many times their original thickness, fusing together to form a non combustible mass which prevents the passage of hot smoke and gases.Tecfire dampers have been tested and assessed by the Warrington Fire Research Centre and maintained their integrity for a minimum of 60 Mins.A copy of the Warrington Fire Research Centre's report, No: 135318, is available free on request.
ConstructionTecfire dampers consist of a sodium silicate intumescent material encapsulated within 40mm x 6mm PVC extrusions which are assembled to form a matrix, mortised jointing of the damper slats to the intumescent outer components eliminates any need for any metal componetry. (Circular units have a pair of outer aluminium rings). Each damper is manufactured 2mm less than the corresponding duct or aperture size to provide clearance during installation.Tecfire dampers are available up to a maximum size of 600mm x 600mm in 25mm increments.
InstallationDucts - Tecfire dampers should be secured within ducting using not less than 4 self tapping screws (on circular units two self tapping screws must be used tofix each aluminium ring). Doors and Partitions - Ensure that cutting anaperture in the door will not detract from the fire integrity of the door. Contact the manufacturer to establish maximum size and optimum position. Cut the aperture to the required size with a gap all around of 3mm. Apply intumescent mastic to the inside faces of the aperture. Fit the damper into the aperture and ensure that it is positioned equidistant from each face and parallel to both faces of the door. Fit retaining 25mm wood screws through the pre-drilled holes in damper outer uprights into door. Clean off surplus mastic and ensure outer edge of damper is fully sealed. Position pressed steel cover grilles centrally over both faces of the damper and fix with 25mm wood screws.MaintenanceTecfire dampers contain no moving parts and require little or no maintenance. Units may be dusted or cleaned using a vacuum cleaner or brush.OptionsWe offer a comprehensive range of steel return air grilles with a white stove enamelled finish or aluminium grillesin a variety of styles and finishes including non-vision grilles. Intumescent sealant for gap sealing between ducts and dampers is available ex stock.
Note: Tecfire dampers are not suitable for applications where high levels of humidity or wetness are anticipated for these applications please refer to your local branch for alternative products. Tecfire dampers should not be used in hot air ductswhere the air temperature exceeds 70ºC.
Your question will be sent to a member of our team. We'll email you the answer and post it on this page. If your question is about an order you already placed, please use our Contact Form to reach the customer service team.
For 4" (100mm) extractor fans or for low power cooker hoods up to 250m³/hour
For medium extraction rates or if available depth is limited up to 500m³/hour
For 6" (150mm) extractor fans or for high power cooker hoods up to 500m³/hour & above
For a shallow space, such as ceiling voids or under floor, where high extraction rates are not needed:
Delivery usually takes 2 - 4 working days. Orders over £100 are delivered free with UK Standard Deliveries
All our online orders are processed through a secure payment service using up to 256 bit encryption system.
Need help with your order?
Call us on 020 8463 9696
Further information can be found here.
i-sells.co.uk supplies our wide range of products daily throughout the UK -
export enquiries are welcome. I-sells for all your ducting, ventilation, air conditioning and damp control needs
Prices include VAT @ 20% where applicable for
trade and export purposes
Express delivery options available on orders placed before noon for in stock items.
2 St John's Parade, Sidcup High Street, Sidcup, Kent, DA14 6ES Get Directions
Contact us: email@example.com Telephone: 0208 463 9696 (international +44 20 8463 9696) Vat Registration number: GB788304203