Hi
I have got an answer from Red sea (Neil) about the ventilation in the hood, so I want to share the information if any needs it. I am waiting for steve to reply on the ventilation kit.
Fan in the hood
Size: 6X6X2 cm
DBA: 20 db
RPM: 2500
CFM 9,9
So I think i Will change them to theese
SilenX Corporation - iXtrema Pro Fans
They got a lower RPM a bigger flow at 10 CFM and only 8 DBA