12 duct cleaning companies in Washington, DC. 11 of them carry a Google rating, from 2.3 to 5.0 stars across 837 reviews — 8 sit at 4.5 or better. 12 list a phone number and 10 a website. Best-rated first; contact them yourself, we don’t resell your details.
Duct cleaning is a separate purchase from HVAC service and usually a separate company, because it needs its own truck-mounted equipment. A reputable operator will inspect and quote before selling a whole-system clean.