Chris-G

Hey @Olly P I wondered where you got to with this. I have the exact same system and after replacing the bearings in one of the fans I have noticed my extract seems very weak. I didn't ever fully balance the system when I installed it, but intend to now. It may be that the extract has always been like this. On 'normal airflow 30%' my extract vents only just hold a tissue. Cheers