We just bought a large ranch house with basement, and wanted to move into a clean, fresh home. We called around to do research and are glad we chose Ductworks. Our tech, James, arrived on time and together we counted 23 vents. He explained how the process works and was very careful about removing vent covers without damage, and protecting the carpet and walls. Pictures showed how dirty the ducts were to start and how clean the tech left them when finished. Apparently they had never been cleaned in over 30 years -- not just dust and cobwebs, but construction debris and junk (little colored beads? M&Ms? who knows…) A very long day - 8:30 to 6:30 due to the volume of cleaning we needed - but the price stayed as quoted. We got 9 before/after pictures sent by e-mail a few days later -- I would have liked to get them all to show my husband but we couldn't download anything since we haven't moved in yet -- no computer on site. Overall, excellent, friendly service (both on the phone and in person) with great results -- thank you, James! We will use Ductworks again in 4 years for the recommended follow-up.