Sentences with phrase «noisy fan unit»

• Noisy fan unit (or undersized) • Fan unit in badly chosen location, eg above bedroom ceiling • Lack of sound separation at fixings • Lack of sound attenuators in ductwork • Poor choice of and / or location of supply & extract terminals (eg just above likely position of bed head)- may also lead to draughts • Commissioned at too high a fan speed (may also lead to dry air / discomfort & excessive energy use).