Booking a duct cleaning for the first time? Here's exactly what a professional job looks like from start to finish — so you know what you're paying for and how to tell a thorough cleaning from a rushed one.
1. Inspection first
A good technician starts by inspecting your system — the vents, returns, furnace, and the state of the ductwork. This confirms what needs doing and gives you a baseline for the before-and-after photos.
2. Sealing and setup
The technician connects a powerful vacuum to your duct system to put it under negative pressure. That way, when the dust is loosened, it's pulled straight out — not blown into your rooms.
3. Agitation and vacuuming
Using brushes and compressed-air tools, the technician loosens dust and debris from the duct walls while the vacuum captures it. Every vent and register is cleaned, one by one.
4. Optional sanitizing
For homes with musty smells, pets, or allergy concerns, a non-toxic sanitizer can be applied to treat the duct surfaces. It's optional — a good company will tell you whether it's worth it for your home rather than upselling by default.
5. Before-and-after photos
This is the step that separates quality companies from the rest. You should see photos of the inside of your ducts before and after — proof of the work, not just an invoice.
How long does it take?
A typical home takes 2 to 3 hours. Larger homes, two-furnace systems, or ducts that haven't been cleaned in many years can take a bit longer. Your family and pets can stay home throughout.
Want the full picture on price too? Read our 2026 duct cleaning cost guide, or book your cleaning online in about a minute.