Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
Before
After
Before
After
Before
AfterAir Duct Cleaning in Herndon, VA
Full-system HVAC cleaning in Herndon typically runs $380-$620 for a standard residential setup, with most jobs completed in a single scheduled visit. We dispatch crews from our Washington, DC office to serve Herndon directly, and every job starts with a written price before any panel comes off. Call (240) 363-3380 for a free estimate.
Herndon’s housing stock is dominated by 1980s and 1990s townhome communities built during the Dulles Technology Corridor boom, with flexible ductwork now 25-40 years old and rarely serviced. The Silver Line Phase 2 construction along Innovation Drive and Sunrise Valley Drive (2014-2022) drove silica and concrete dust deep into HVAC systems across the corridor, a contamination pattern our crews still document in supply runs today.
Why Herndon Homes Are Different
Herndon’s development history creates distinct ductwork problems. The dense waves of townhomes and single-family homes built in the 1980s and 1990s used flexible duct systems that sag at connections over time, creating debris traps and airflow restrictions. In the historic core near Elden Street, pre-1960s homes may retain original sheet-metal ductwork or asbestos-insulated duct wrap that requires careful assessment before any cleaning begins.
Northern Virginia’s humid subtropical climate compounds these issues. Summers in the upper 80s°F with relative humidity above 70% produce condensation inside poorly insulated flex ducts, making mold colonization a recurring problem. Spring pollen loads from oak, cedar, and maple get pulled directly into HVAC returns and cake duct interiors. The Silver Line construction added a unique layer: fine silica dust from years of excavation along Route 267 settled past standard MERV filters into supply duct runs, residue we still photograph in homes near the corridor.
Our Main Herndon Services
Herndon homeowners contact us most often for these three services, each with its own dedicated local page.
Air Duct Cleaning in Herndon
We clean every duct run in Herndon homes with negative-pressure extraction, photographing the interior of each line before and after. Crews regularly find 3-inch debris build-ups at flex-duct elbows in townhome communities, plus silica residue from Silver Line construction in corridor properties. Every job concludes with a Documented Photo Record delivered to the customer. Air Duct Cleaning in Herndon
Dryer Vent Cleaning in Herndon
Dryer vent blockages in Herndon’s multi-story townhomes create lint accumulation across extended vertical runs, increasing fire risk and drying times. We use rotary brush systems to clear the full length of each vent, with before-and-after photos of the duct interior. Haven Standard Clause 1 applies: written price before work starts. Dryer Vent Cleaning in Herndon
Duct Repair & Sealing in Herndon
Aging flex-duct connections in Herndon’s 1980s and 1990s housing stock separate and sag, leaking conditioned air into attics and crawl spaces. We seal with mastic and metal tape, replacing damaged sections where needed, and photograph every repair. The 365-Day Done Right Promise covers all sealing work in writing. Duct Repair & Sealing in Herndon
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
BeforeAfterHVAC Cleaning in Herndon
Herndon’s climate and housing age make HVAC cleaning essential rather than optional. The combination of 25-40-year-old flex ductwork, high summer humidity, and Silver Line construction dust means evaporator coils, blowers, and condensers operate under heavier contamination loads than systems in newer Fairfax County communities. We clean each component with documented photo records, and every quote is written before work begins under Haven Standard Clause 1. Our HVAC Cleaning service covers the full system.
Evaporator Coil Cleaning
Signs you need it
Ice formation on the coil, weak airflow from registers, or musty odors when the AC cycles on in Herndon’s humid summer months.
What it costs in Herndon
Evaporator coil cleaning in Herndon typically ranges $180-$320.
How we do it
We access the coil through the plenum (the main air distribution box), apply foaming cleaner, rinse with low-pressure water, and photograph the coil surface before and after.
Blower Cleaning
Signs you need it
Vibration or noise from the air handler, uneven heating or cooling across rooms, or dust puffing from registers when the system starts.
What it costs in Herndon
Blower cleaning in Herndon typically ranges $160-$280.
How we do it
We remove the blower assembly, clean blades and housing with compressed air and solvent, balance the fan, and document with before-and-after photos.
What HVAC Cleaning Costs in Herndon
| Item | Typical range in Herndon |
|---|---|
| Evaporator coil cleaning | $180-$320 |
| Blower cleaning | $160-$280 |
| Condenser cleaning | $140-$240 |
How do I know my HVAC system needs cleaning in Herndon?
If your home was built in the 1980s-1990s and you’ve never had the evaporator coil or blower serviced, debris accumulation is likely restricting airflow and efficiency. Call (240) 363-3380 for a free inspection and written estimate.
What’s included in the photo documentation for HVAC cleaning?
We photograph the interior of every accessible component before and after cleaning, including the coil face, blower blades, and plenum interior, delivered as part of your standard job record. Call (240) 363-3380 to schedule.
Air Quality & Sanitizing in Herndon
Herndon’s humid summers and aging flex ductwork create conditions where mold and bacteria colonize duct interiors, particularly at sagging connections where condensation pools. The Silver Line construction dust that penetrated homes along Innovation Drive and Sunrise Valley Drive also introduced fine particulates that standard filtration missed. Our Air Quality & Sanitizing service treats these contamination sources with documented results.
Mold Treatment
Signs you need it
Visible mold around registers, persistent musty odors when the HVAC runs, or recent water intrusion in crawl spaces or attics.
What it costs in Herndon
Mold treatment in Herndon typically ranges $280-$480 per affected zone.
How we do it
We apply EPA-registered antimicrobial through the duct system using fogging equipment, with Abatement Technologies HEPA filtration running during treatment, and photograph all affected areas.
UV Light Installation
Signs you need it
Recurring mold despite cleaning, high humidity in the home, or family members with allergy symptoms that worsen when the HVAC cycles.
What it costs in Herndon
UV light installation in Herndon typically ranges $320-$520 per unit.
How we do it
We mount a UV-C lamp in the supply plenum to irradiate passing air and coil surfaces, wire to the blower circuit for automatic operation, and show the customer the installed position with photos.
What Air Quality & Sanitizing Costs in Herndon
| Item | Typical range in Herndon |
|---|---|
| Mold treatment (per zone) | $280-$480 |
| UV light installation | $320-$520 |
| Bacteria sanitizing (whole system) | $220-$380 |
How do I know if I have mold in my ducts?
Musty odors when the system runs, visible discoloration around registers, or worsening allergy symptoms in humid summer months are common indicators in Herndon’s climate. Call (240) 363-3380 for a free inspection and written estimate.
Is UV light installation worth it in Herndon’s climate?
For homes with chronic mold recurrence or high humidity, UV-C lamps at the coil surface prevent re-colonization between cleanings. Call (240) 363-3380 to discuss whether your system configuration supports installation.
Brands We Service in Herndon
We stock parts and service equipment from Aprilaire, Abatement Technologies, Guardsman, and Rotobrush, with most replacement components available for same-day installation on scheduled visits. See our brands for the full equipment roster.
Pricing for Air Duct Cleaning in Herndon, VA
| Service | Typical range in Herndon |
|---|---|
| Full-system air duct cleaning (standard home) | $380-$620 |
| Dryer vent cleaning | $120-$220 |
| Duct repair & sealing (per run) | $180-$340 |
| Evaporator coil cleaning | $180-$320 |
| Blower cleaning | $160-$280 |
| Condenser cleaning | $140-$240 |
| Mold treatment (per zone) | $280-$480 |
| UV light installation | $320-$520 |
Prices increase in Herndon when multiple zones require treatment, when access panels must be cut for reach, or when asbestos-insulated duct wrap is present in pre-1960s homes near Elden Street. Every price is written and agreed before work starts, with no per-vent add-ons or post-arrival revisions.
Neighborhoods We Serve in Herndon
We schedule Herndon appointments with route density in mind, typically booking within 3-5 business days for standard cleaning and 1-2 days for documented mold or airflow emergencies.
- Dranesville
- Franklin Farm
- McNair
- Worldgate
- Historic Herndon (Elden Street corridor)
Service Area - Cities Near Herndon
CleanRun crews serve the full Dulles corridor from our Washington, DC dispatch office, with regular routes to Reston, VA, Sterling, VA, Fairfax, VA, and Falls Church, VA. Scheduling is coordinated across all locations with the same upfront-pricing and photo-documentation standards.
Serving Herndon, VA - Our Local Coverage Area
We’re based in the Herndon area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Air Duct Cleaning in Herndon
Standard residential duct cleaning does not require a permit in Fairfax County, but duct modifications or asbestos remediation in pre-1960s homes near Elden Street may trigger county inspection requirements. We assess this during our initial inspection and note any permit needs in the written scope.
Standard HVAC and duct cleaning appointments typically book within 3-5 business days; mold treatment or airflow emergencies are usually scheduled within 1-2 days. Call (240) 363-3380 for current availability.
Most Herndon townhome communities allow daytime service vehicle access without prior notice, but some planned developments require parking permits or gate codes. We coordinate directly with you for any community-specific requirements before the crew arrives.
Ready for a written estimate? Call (240) 363-3380. Every Herndon job starts with a fixed price, documented photos, and the 365-Day Done Right Promise in writing.
What happens when you call
- 1A real person answersNo phone trees - talk to a local air duct cleaning pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Herndon Customers Say
"Flat price agreed up front, no per-vent add-ons at the end. That was the whole reason I did not call the coupon company."
- Suzanne B."My allergies genuinely improved. They also told me the ducts did not need sealing, which I had been quoted for elsewhere."
- Petra K."The before and after photographs of each run are the reason I used them. You cannot argue with what came out of the return."
- Marguerite O.