Air Duct Cleaning in Sterling - Flat Price Per System, No Per-Vent Upsells

Air Duct Cleaning in Sterling, VA

HVAC cleaning in Sterling typically runs $350-$650 for a full system, with most jobs completed in a single scheduled visit. We’re CleanRun Duct Repair & Cleaning, and crews serve Sterling from our Washington, DC dispatch office. Call (571) 520-6317 for a written estimate before any work starts.

Call (571) 520-6317

Sterling’s housing stock sits at a critical age. The 1970s-80s builds in Sterling Park and the 1990s-early 2000s Cascades homes have duct systems now 25-45 years old - exactly when flex duct collapses, fiberglass liner sheds, and decades of Dulles corridor humidity turn neglected runs into mold reservoirs. Our crews document every job with before-and-after photos of every duct run, and every price is written before a panel comes off.

Why Sterling Homes Are Different

Sterling’s two major build waves create distinct duct problems we don’t see in newer Loudoun County suburbs. The Sterling Park-era homes used fiberglass duct board and early flex duct that is now past manufacturer service life; we regularly find liner deterioration shedding visible particles into supply air. In Cascades, the large two-story plans required long, multi-bend flex runs that trap debris at every elbow, with secondary-zone damper boxes above first-floor ceilings collecting years of invisible dust cake.

The Dulles Airport corridor climate cycles systems hard: 90°F+ summers with dew points in the 70s, followed by cold winters. This creates interior duct condensation, especially in partially shaded crawlspaces common to Sterling’s split-level and colonial-style homes. Unlike Ashburn’s newer stock, Sterling sits at the older end of Loudoun County’s suburban age curve where deferred maintenance shows up as real particulate load, not theoretical concern.

Our Main Sterling Services

Homeowners in Sterling call us most often for these three services, each with its own dedicated Sterling page.

Air Duct Cleaning in Sterling

We clean the full duct network in Sterling homes, from plenum - the distribution box where heated or cooled air first enters the duct system - through every register. Our crews photograph the inside of every run before and after, and the documented photo record is delivered as a standard job deliverable. In Sterling’s older flex-duct homes, we pay particular attention to sagging runs and disconnected joints that trap debris. Air Duct Cleaning in Sterling covers full pricing and scope.

Dryer Vent Cleaning in Sterling

Dryer vent blockages are a leading cause of home fires in Loudoun County, and Sterling’s townhome clusters with shared vent runs see compounded lint load. We use professional-grade extraction tools to clear the full vent path and verify airflow at termination. Every job includes a written scope and the 365-Day Done Right Promise. Dryer Vent Cleaning in Sterling has full details.

Duct Repair & Sealing in Sterling

When Sterling’s aging flex duct has collapsed runs or disconnected joints, cleaning alone won’t fix the airflow loss. We repair or replace damaged sections and seal leaks with mastic and metal-backed tape, then pressure-test the system. All repair work carries a written price agreed before tools come out. Duct Repair & Sealing in Sterling explains our repair scope.

Before

After

HVAC Cleaning in Sterling

Sterling’s 25-45 year old HVAC systems run harder than design spec due to duct leakage and coil fouling from Dulles corridor pollen and construction dust. Full HVAC Cleaning addresses the components that move and condition air, not just the ducts that distribute it. In Cascades homes with original equipment, we regularly find evaporator coils caked with debris that reduces capacity by 20% or more.

Evaporator Coil Cleaning

Signs you need it

Weak airflow from registers, ice formation on refrigerant lines, or cooling that can’t keep up on 95°F Sterling afternoons.

What it costs in Sterling

Evaporator coil cleaning in Sterling typically runs $180-$340.

How we do it

We access the coil through the air handler, apply foaming cleaner, rinse with low-pressure water, and photograph before and after through the access panel.

Blower Cleaning

Signs you need it

Vibration noise from the air handler, uneven heating or cooling between rooms, or dust puffing from registers when the system cycles on.

What it costs in Sterling

Blower cleaning in Sterling typically runs $150-$280.

How we do it

We remove the blower assembly, clean blades and housing with compressed air and solvent, balance the wheel, and reassemble with torque-checked hardware.

What HVAC Cleaning Costs in Sterling

How do I know my HVAC components are actually dirty?

We photograph every component before touching it; you see the debris load on your own system before deciding on scope. Call (571) 520-6317 and we’ll show you what we find.

Can HVAC cleaning fix uneven temperatures between rooms?

Yes, when the cause is blower imbalance or coil restriction; we test airflow at each register before and after to verify improvement.

Air Quality & Sanitizing in Sterling

Sterling’s humid summers and 25-45 year old duct systems create conditions where mold and bacteria colonize interior duct surfaces, not just filter media. Air Quality & Sanitizing treats biological contamination at source rather than masking odor. In Sterling Park homes with original fiberglass duct board, we regularly find active mold growth where liner has degraded.

Mold Treatment

Signs you need it

Musty odor when HVAC cycles on, visible spotting around registers, or aggravated allergy symptoms during Sterling’s humid summer months.

What it costs in Sterling

Mold treatment in Sterling typically runs $400-$800 depending on affected duct footage.

How we do it

We apply EPA-registered antimicrobial through the full duct network under negative pressure, then HEPA-vacuum dead material and deliver post-treatment photos.

UV Light Installation

Signs you need it

Recurring mold after cleaning, or a home in shaded Sterling lots where duct condensation persists despite proper insulation.

What it costs in Sterling

UV light installation in Sterling typically runs $300-$550 per unit.

How we do it

We mount a Honeywell or Guardsman UV-C lamp in the supply plenum, wire to the blower circuit for automatic operation, and verify irradiance with a meter.

What Air Quality & Sanitizing Costs in Sterling

Is mold in ducts common in Sterling?

Yes, the Dulles corridor humidity and 25+ year old duct systems make it more common here than in newer Loudoun County builds; we find active growth in roughly one-third of Sterling homes over 30 years old.

Will UV lights prevent mold from coming back?

UV-C lamps inhibit growth on irradiated surfaces when properly sized and maintained; we specify Honeywell and Guardsman units with documented output specs.

Brands We Service in Sterling

We stock parts and service equipment from Honeywell, Aprilaire, Rotobrush, and Guardsman, with most common filters and UV lamps available without ordering delay. Our brands page lists full compatibility.

Pricing for Air Duct Cleaning in Sterling, VA

Neighborhoods We Serve in Sterling

We schedule Sterling jobs by cluster to keep response times predictable across Loudoun County. Crews typically arrive within the scheduled window without multi-day waits.

• Sterling Park
• Cascades
• Countryside
• Lowes Island
• Potomac Lakes

Service Area - Cities Near Sterling

Our crews cover the full Dulles corridor and western Loudoun County, with regular routes to Herndon, VA, Reston, VA, Chantilly, VA, and Leesburg, VA. Scheduling is coordinated from our Washington, DC office with local Sterling dispatch.

FAQs About Air Duct Cleaning in Sterling