Safe metal ducting contains rubber seals while standard metal ducting does not.
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Bathroom zones are just a way of telling which extractor fan you can install in a specific place.
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Please Note: Ducting tubes over 200mm in diameter and 3 metres in length may incur additional shipping charges.
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(4) Questions | (4) Answers | Ask a Question
• Suitable for high, medium and low pressure applications.• Fire resistant – tested to and complies with BS476.• Complies with the requirements of DW144.• Duct construction provides low friction loss.• Insulated and Acoustic ductings also available.• Bendable ducting constructed from pure aluminium.
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Can you please advise what the Pa/metre figure is for the 150mm and 125mm semi rigid ducting.
Hello Graham,The Static Pressure Drop will depend on the temperature. Please see the last page of the datasheet which can be downloaded from here which contains a table showing the different values: http://www.i-sells.co.uk/fdm_download_file.php?fileidThe maximum working pressure of the semi-rigid is 2000 Pa.Kind regards,Michael
Is this product suitable for cooker extract 5m vertical in existing chimney? How do I join 3m lengths, what clip to secure at top only?
Hello David,The product is suitable for use in ventilation applications as long as the duct diameter is suitable for the airflow of your cooker hood and as long as the working temperature, pressure, and airflow does not exceed the ducts stated maximums which are:
SEMI-RIGID ALUMINIUM FLEXIBLE DUCTING - 3M - 150MM
I have recently purchased an extractor hood for my kitchen and before I purchase the above mentioned item, I would like to know if I will be able to compress this 150mm ducting through an aperture of 100mm, albeit an elliptical hole of a wider dimension into my roof space?
From the additional details on the PDF (see below) I notice it can be compressed, but to what extent?
Your help would really be appreciated.
Tecflex 500 retains its cross section regardless of
state; it can be compressed, extended or formed into
bends or offsets with no reduction in area.
Thank you for your question. When it states compressed it means that the pipe is compressed into a one meter length and can be extended into a 3meter length. If you need to reduce from 150mm-100mm then there is a reducer we do product code QS4256. Just to advise that if you are reducing from 150mm-100mm you will restrict your airflow. If I can help any further please do not hesitate to contact me on 0208 463 9683.
I have a distance of about 1.5 metres from cooker hood to outside vent. This includes one 90 degree bend vertically above the hood to then run horizontally to the outlet.
Is the lowest air flow resistance obtained by fully stretching the ducting and trimming off at the outlet or by just stretching enough to fit into the 1.5m run?
Thank you for your question. The lowest air flow resistance would be by stretching the semi rigid enough to fit the 1.5m run or another option would be to use the rigid ducting and a bend. If I can help any further please do not hesitate to contact me on 0208 463 9683
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:
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