Air Duct Cleaning FAQ — Alexandria, VA

The price depends on the number of vents, the size of your home, and what's actually in the ducts. A 1950s house in Del Ray with original ductwork and years of buildup takes more work than a smaller newer home. We don't quote a flat rate until we've looked at the system. Call for a free estimate.

The clearest signs are visible dust blowing from registers when the HVAC turns on, a musty smell that gets stronger in summer, or a layer of dust on surfaces within a day or two of cleaning. If you've done any renovation work — drywall, sanding, demolition — the ducts almost certainly need cleaning. Alexandria's humid summers also push moisture into return air ducts, which can lead to mold growth you can't see from the outside.

Most single-family homes in the area take two to four hours depending on the number of vents and how dirty the system is. Larger homes with multiple HVAC zones take longer. We'll give you a realistic time estimate after the inspection so you're not waiting around all day.

We start with a visual inspection and camera check of the duct system. Then we connect the vacuum to the main trunk line to create negative pressure in the system. A rotating brush works through each supply and return duct while the vacuum pulls everything out. We finish by cleaning the registers and checking the air handler area.

Every three to five years is a reasonable baseline for most homes. If you have pets, someone in the house with allergies or asthma, or you've had any construction work done, cleaning more often makes sense. Older homes — anything built before 1980 — often go decades between cleanings and need more than just a standard pass.

It depends on the state of your ducts and who does the work. If a company charges very little and spends under an hour on the job, they're not actually cleaning anything — they're blowing debris around and leaving. A proper cleaning with negative pressure vacuum equipment does remove real buildup and does improve airflow. The EPA notes it isn't necessary for every home every year, but homes with mold, heavy debris, or post-renovation dust benefit clearly.