When I had my HVAC system replaced in 2012 (after 11 years), I had the ducts cleaned. You will not believe what an accumulation of dust/dirt,etc there was up there.
My returns are in the ceiling. When they guy came out of the return he was covered with gray from the stuff that came out.
I think that I will have the ducts cleaned every five years or so - regardless of what you posted.
Z
|