I recently had a bathroom fan fitted with the flexible ducting going through the loft to the outside wall. From what I have read flexible ducting going through a cold space should be insulated to prevent condensation and lead to problems like legionnaires disease.
Having read further from what I can gather flexible ducting should be no longer than 300mm and clearly it is longer than this.
So should it be replaced with rigid ducting to meet building regs?
Having read further from what I can gather flexible ducting should be no longer than 300mm and clearly it is longer than this.
So should it be replaced with rigid ducting to meet building regs?