How New Ducts Get Dirty
The EPA's Indoor airPLUS program describes the problem directly. Sawing, sanding and drywall installation fill the air with fine dust that gets drawn into ducts and equipment even when the system isn't running. Sawdust, material scraps, carpet fibers, nails and screws fall into open floor ducts and register boots. Flex duct's grooved lining holds onto dust more than smooth metal does.
Already moved in and still wiping dust every day? See why a new house stays dusty.
What Good Builders Do About It
| Approach | What it involves | Question to ask your builder |
|---|---|---|
| Cover duct openings | Openings stay sealed through dusty phases | "Were registers and boots covered during drywall and flooring?" |
| Vacuum before registers go in | Ducts get cleaned before the final registers are installed | "Were the ducts vacuumed before trim-out?" |
| System off during construction | Equipment doesn't pull construction dust | "Did the HVAC run while drywall was sanded?" |
The first two approaches are the options Indoor airPLUS partner builders use. Renovations follow the same logic; see post-construction duct cleaning.
New Home Duct Checklist for Buyers
At the Final Walk-Through
Lift two or three registers and shine a light into the boots. Note any powder, sawdust or screws in writing.
Look at the Filter
A gray filter in a brand-new house means construction dust passed through the system.
Check the Exhaust Vents Too
Confirm the dryer duct is connected and the outside flap opens. A dryer vent inspection covers the details.
Replace the Filter After 30 Days
Move-in traffic stirs up dust. Check whether the new filter stays clean.
Decide With Evidence
Debris in boots or a fast-graying filter justifies a cleaning. If you're unsure, book a camera inspection.
How to Prepare a House for Air Duct Cleaning
- Clear furniture and boxes away from every register and return
- Unlock the attic hatch or utility closet where the air handler sits
- Leave parking near the front door for a truck-mounted vacuum hose
- Keep pets in a closed room during the work
- Plan the cleaning before unpacking fills the rooms, if possible
New Homes Around Dulles
U.S. Census Bureau estimates show 41 percent of homes in the Dulles 20166 ZIP code were built in 2010 or later, and 41 percent are townhomes. Communities like Kincora are still adding townhomes and townhome-style condos, which is why construction dust is one of the most common duct questions in this ZIP code.