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.
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Before
AfterFast, Reliable Air Duct Cleaning Across Herndon
Air duct cleaning in Herndon, VA typically runs $380-$680 for a whole-home residential system and includes a documented photo record of every duct run, delivered before our crew leaves. Most Herndon jobs are scheduled within 3-5 business days, with dispatch coordinated from our Washington, DC office and crews routing directly to homes in the Herndon Parkway, Elden Street, and Worldgate corridors. Call (240) 255-4519 for a written estimate - we put the full price on paper before any panel comes off, every time, under Haven Standard Clause 1.
We’ve worked Herndon long enough to know the difference between a 2019 build off Centreville Road and a 1992 townhome cluster near the airport. The ductwork tells a different story in each. That’s not generic expertise - it’s local pattern recognition built from documented inspections in this specific housing stock.
Why CleanRun Air Duct Cleaning Rockville Is Herndon’s Preferred Air Duct Cleaning Company
Our Air Duct Cleaning team has documented photo records from jobs across Herndon’s townhome communities, from the older subdivisions along Monroe Street to the denser clusters off Elden Street near the Dulles Access Road. Herndon homeowners see the before-and-after images from their own duct runs, not stock photos, before deciding whether to proceed with sealing or replacement work.
We maintain a strong local reputation through verifiable results, not longevity claims. Every job since our founding in 2013 has started with a written price and concluded with a photo record - 52,000+ homes, every one documented. The 365-Day Done Right Promise applies in Herndon exactly as it does everywhere else: if the work is not right, we make it right, backed in writing, not subject to manager discretion.
Technicians serving Herndon are background-checked and uniformed under Haven Standard Clause 3: Verified Crews. You’ll get the technician’s name before arrival, not a random subcontractor. And our Free Second Opinion policy means any Herndon homeowner with a competitor’s written estimate can bring it to us; we’ll put our number next to it, in writing, at no cost.
Our Air Duct Cleaning Services in Herndon
Residential Duct Cleaning
Herndon’s residential stock demands a specific approach. The late-1980s and 1990s townhomes that dominate this market - built during the Dulles tech-corridor boom - commonly run original flex duct with fiberglass duct-board plenums now 30-40 years old. We start every Herndon residential job with a video inspection of the plenum and main trunk, because we’ve learned that cleaning without checking the liner condition just redistributes fiberglass microfibers into living space. Our negative-pressure extraction system, using Rotobrush and Abatement Technologies equipment, captures loosened debris at the source rather than pushing it through the home.
Commercial Duct Cleaning
Herndon’s commercial base sits close to Dulles International Airport and the Route 28 technology corridor, meaning office HVAC systems process elevated particulate loads from jet exhaust and freight traffic. We clean commercial duct systems in Herndon office parks and retail spaces with the same documented photo protocol as residential jobs, scaled to larger trunk-and-branch systems. Written scope and price before work starts; photo record of every accessible duct run delivered at completion.
Supply Duct Cleaning
Supply runs in Herndon townhomes often show the hardest wear. These are the ducts pushing conditioned air to your registers, and in the original flex systems common off Herndon Parkway, they’re where liner delamination first appears. We photograph each supply run before agitation, then use controlled mechanical brushing with HEPA-contained negative pressure to remove buildup without breaching compromised liner material. If the camera shows delamination, we flag it in the written scope before proceeding - Haven Standard Clause 1 requires the customer see the price for any repair or replacement before we continue.
Return Duct Cleaning
Return ducts pull air back to the HVAC unit, and in Herndon’s older townhomes, they’re where we most often find loose joints from years of freeze-thaw cycling. A return with a gaping joint in an unconditioned attic chase isn’t just dirty - it’s pulling fiberglass insulation, dust, and attic particulates directly into your system. Our return cleaning includes joint inspection; if we find separation, we document it and quote sealing work before the cleaning proceeds. The photo record shows you exactly what we found and what we did about it.
Full System Cleaning
This is the service most Herndon townhomes actually need. Full system cleaning covers supply runs, return runs, trunk lines, and the plenum - the central distribution box where your main ducts connect. In Herndon’s 1980s-1990s housing stock, the plenum is often duct board with a degrading fiberglass liner, and the trunk may be original flex with sagging sections holding condensation. We clean the entire network under continuous negative pressure, photograph every component, and flag any structural issues for repair or replacement. A partial clean on a compromised system is documented evidence of incomplete work, and we don’t do it.
Video Inspection
Every Herndon job starts here. We run a camera through the main trunk and representative branch runs before quoting any work. In the townhome clusters near Elden Street and Herndon Parkway, this inspection regularly reveals detached flex runs, crushed sections from storage activity in attic chases, or liner delamination shedding particles into supply air. The video becomes part of your documented job record, timestamped and referenced in the written scope. You see what we see before you agree to any price.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Before
AfterTrusted Brands We Service in Herndon
CleanRun crews carry professional-grade equipment from Honeywell, Aprilaire, and Abatement Technologies on every Herndon job - brands you can verify independently before we arrive. We don’t use equipment that can’t be named and researched. For Herndon homeowners with integrated air-quality systems, this means we can service Honeywell electronic air cleaners and Aprilaire media filters during the same visit as duct cleaning, without a second trip or a second dispatch fee. Parts for common Honeywell and Aprilaire components are stocked for Herndon-area jobs, so replacement doesn’t add days to the schedule.
Common Air Duct Cleaning Problems We See in Herndon Homes
- Fiberglass liner delamination in original flex duct. The 1980s-1990s townhomes along Herndon Parkway and Elden Street routinely still run their original flex duct, and the inner fiberglass liner has begun to separate from the outer shell. The camera shows a fuzzy, shedding surface that releases microfibers into supply air. Cleaning without replacing compromised runs just lofted those fibers into living space temporarily.
- Mold growth in humid attic chases. Northern Virginia’s summer dewpoints in the mid-60s to low 70s°F create persistent condensation inside poorly insulated flex duct routed through unconditioned attic spaces. We find mold colonization in the liner material, not just surface dust, which requires source removal - cutting out affected sections - rather than surface agitation that would spread spores.
- Loose joints from freeze-thaw cycling. Herndon winters cycle above and below freezing repeatedly, expanding and contracting metal duct joints until they separate. A loose return joint in an attic chase pulls in insulation particulates and unconditioned air, raising energy bills and contaminating the system. Cleaning without sealing these joints leaves the root problem intact.
- Crushed or disconnected runs in tight chases. The townhome format squeezes ductwork into narrow attic spaces where storage activity, rodent pressure, or simple gravity over 30+ years has collapsed flex runs or pulled connections apart. The video inspection finds these; the written scope prices the repair; the photo record documents the fix.
Pricing for Air Duct Cleaning in Herndon, VA
A typical whole-home residential duct cleaning in Herndon runs $380-$680 for a standard townhome or single-family system with 8-15 registers. Commercial systems in Herndon office spaces start around $850-$1,400 depending on accessible duct footage and contamination level. Video inspection, included in every job, would separately cost $150-$250 if booked alone; we bundle it because quoting work blind violates Haven Standard Clause 1.
What moves a Herndon job toward the higher end: original flex duct requiring delicate handling, visible mold requiring source removal and liner replacement, or multiple disconnected runs needing reconnection and sealing. We do not quote per-vent pricing - that structure invites bait-and-switch. One flat price per system, agreed in writing before work starts, with every line item named.
Bring a competitor’s written estimate and we’ll provide a Free Second Opinion, our number next to theirs, no charge. Call (240) 255-4519 for your written estimate - we don’t do “call for a quote.”
| Service | Typical Range in Herndon |
|---|---|
| Residential Whole-Home Cleaning | $380 - $680 |
| Commercial System Cleaning | $850 - $1,400+ |
| Video Inspection (bundled with clean) | Included |
| Duct Repair / Run Replacement (per run) | $180 - $340 |
| Plenum Replacement (fiberglass duct board) | $450 - $750 |
We Also Serve Cities Near Herndon
CleanRun crews route to Herndon and neighboring communities from our Washington, DC dispatch office. We also serve homeowners in Reston, Sterling, Fairfax, and Leesburg with the same documented photo protocol, written upfront pricing, and 365-Day Done Right Promise. Each city’s housing stock and contamination profile differs - Reston’s newer mixed-use developments present different duct conditions than Herndon’s 1980s-1990s townhome concentrations - and our inspections account for those differences.
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 - Air Duct Cleaning in Herndon
Because the original flex duct in these 1980s-1990s builds has reached the age where fiberglass liner delamination is standard, not rare. The camera shows whether the inner surface is intact or shedding microfibers into your air - information that completely changes the scope and price of safe, effective work. Without this inspection, a cleaning could loft fiberglass particles into living space rather than removing them. Call (240) 255-4519 to schedule; the video is included in every job.
Yes. Herndon’s position immediately adjacent to IAD, one of the East Coast’s busiest cargo and passenger airports, exposes homes along Route 28 and Herndon Parkway to elevated jet exhaust particulates and ultrafine particles that continuously infiltrate residential HVAC systems. Homes in this corridor typically show heavier accumulation in return ducts and filters than comparable properties in Reston or Sterling, farther from the flight paths. The cleaning interval depends on your specific exposure, filter quality, and whether windows are kept open, but the contamination profile is measurably different here.
We regularly find three conditions: sagging flex duct holding condensation from summer humidity, which promotes mold growth in the liner; loose joints pulled apart by years of thermal cycling; and crushed sections where the original installation left inadequate support or where storage activity has compressed the run. The tight chase geometry common in these townhomes means problems in one run often affect adjacent returns. The video inspection maps the whole network before we quote any work.
We use continuous negative-pressure extraction with HEPA filtration, which captures loosened debris at the duct opening before it enters living space. If video inspection shows active liner delamination, we flag compromised runs for replacement rather than cleaning - agitating a shedding surface would redistribute fibers. For runs that are intact enough to clean, we control brush speed and airflow to minimize mechanical stress on the liner. The system remains under negative pressure until the final register is sealed, and we run a post-cleaning camera pass to verify no visible fiber release. Call (240) 255-4519 to discuss your specific system.
No. A crushed flex run or detached joint is a structural failure, not a contamination issue. Cleaning debris from a run that isn’t delivering air to its register, or that’s pulling attic air through a gap, solves nothing. We document these failures during video inspection, quote the repair or replacement separately under Haven Standard Clause 1, and perform the work before or during the cleaning phase. The photo record shows the corrected airflow path and the cleaned interior - two distinct deliverables, both documented.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Herndon and Northern Virginia since 2013.