Don and Nicole did a fantastic job cleaning our furnace blower (caked with wallboard dust), heating ducts (11 years' worth of gunk), and dryer vent (including removing the bird's nest that was stuck in it!). They were pleasant, personable, thorough, and respectful of our home and property. We were impressed with their professionalism and friendliness, and their prices were very reasonable. Dr. Ducts is definitely "my guy" for furnace maintenance.