Have moved into a split level house in northern NSW coast near Coffs Harbour.
I need to improve subfloor ventilation, it’s approx 30yr old house. It’s on a sloped block with a pool. In the pool yard which is ground level I can see multiple (16 from memory) weeper holes on a double brick wall that flow underneath the house.
On the opposite wall which is the garage and internal house walls I don’t have any vents so a slow leak from a pipe has made some dirt damp and I can’t see anywhere it has the chance to dry out
Question is, for me to punch a hole through and allow passive airflow through it needs to be an internal wall. Are the brick grid/vents I see online and Bunnings etc suitable to use inside or will I likely need an active powered fan solution to push the air through to another external wall and not inside?
Just asking for a perspective based on others experience before I get the bias opinion of a ventilation company over to take a look
Cheers
Nathan