On our 2001 34 we fitted an Eberspacher behind the panel at the end of the starboard cabin ( 3 cabin version) in the sugar scoop space.
    Leaves lockers free for stowage etc
    Exhaust through transom and trunking to every cabin except the head (discourages people from taking too long in winter ).
    So far no problems.
    Following this months report in PBO we are going to insulate the pipe runs.