Duct Doctor Greensboro - Duct Cleaning Services - Residential & Commercial Greensboro, Winston-Salem, & High Point, NC. Duct Doctor Greensboro provides professional cleaning for HVAC ducts and dryer ducts in both commercial and residential locations. The health benefits of cleaner air are becoming more important as climate change increases. Prevent respiratory problems, allergies, and other health issues associated with poor air quality in your home by getting your duct work cleaned regularly. Additionally, duct cleaning removes odors, extends the life of your HVAC system, reduces household dust, and makes your home more energy efficient.