hvac duct cleaning- scam or worthwhile?
Has anyone had their heating/AC ducts cleaned? My thoughts were that it's a scam, we normally change our filters once or twice a year and that's all that's ever been suggested. My mother has it in her head that she's lived in her home for 35+ years and the vents are dirty and causing more dust. I think a service call to change her filters is all that's necessary. What is your experience? I did a search on the home repair and HVAC forums on GW and didn't find any related posts.
FYI she lives in Southern CA and uses a forced air heat and a/c system.