I'm currently having a problem with my inline fan.. The fan itself is quiet, the exhaust side is quiet. But the intake side pulling thru filter is loud as hell. Anyone have similar prob that may have a solution to this? It seems to me like the exhaust side would make the most noise. I've already wrapped the entire fan inside 10in duct sleeve, all my duct work is insulated duct, everything is quiet except for where the filter connects. Any help would be appreciated.