June 25, 2025Jun 25 comment_50378 Please can someone give me some guidance regarding fire dampers? Do the bathroom extraction ducts which travel into the protected corridors need fire & smoke dampers? ADB Vol 2 - 10.22 suggests that they do and they must be linked to the fire alarm. But I have been to a hotel (approx. 20 years old) where there is no fire damper fitted to the ducts coming from the bathrooms. Someone suggested they may be 'shunt ducts' but I cannot seem to understand how these work?! And whether they are acceptable? Any advice would be greatly appreciated. Report
June 25, 2025Jun 25 comment_50386 If they are shunt ducts they are designed to reduce fire and smoke spread - if not and are directly ducted it's not considered practicable to retrofit new ducting or dampers but for bathrooms a more simpler intumescent grille is considered adequate, this would be more so in a hotel that simultaneously evacuates unlike flats. Report
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