If you’ve lived in a Raleigh home for more than a few years, you’ve probably wondered at some point whether your air ducts need cleaning. Maybe it’s the dust that resettles on the shelves a day after you wipe them down, or a musty smell that kicks on with the HVAC system, or just the fact that nobody can remember the last time anyone looked inside those ducts. Air duct cleaning in Raleigh, NC comes up a lot in home maintenance conversations here, partly because of how mixed the local housing stock is: century-old bungalows Inside the Beltline, mid-century ranches…