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
HVAC cleaning in Herndon typically runs $380-$620 for a whole-system job, with most appointments scheduled within a week. The townhome-heavy housing stock here, built during the Dulles Technology Corridor boom with fiberglass duct board instead of sheet metal, makes the work more technically demanding than in newer suburbs. We dispatch crews from our Washington, DC office and serve Herndon homeowners with written prices before any work starts. Call (571) 520-6317 for a free estimate.
Why Herndon Homes Are Different
Herndon’s residential core is dense with townhomes and garden condos built between 1978 and 1995, when fiberglass duct board was the standard HVAC construction method. That material, now 30-45 years old, deteriorates and sheds glass fibers while trapping moisture far more readily than sheet metal. In Northern Virginia’s humid subtropical summers, attic and crawlspace humidity pushes condensation inside supply ducts, creating persistent mold-and-mildew conditions that metal ductwork resists better.
The Dulles-area location also puts Herndon in a heavier precipitation and pollen belt than DC proper, increasing particulate load on return-air systems seasonally. In the dense 1980s clusters off Elden Street and around the Herndon Parkway corridor, duct runs branch through shared party-wall chases that standard rigid equipment cannot reach. Technicians without flexible-shaft brush systems clean only the visible trunk lines and leave branch runs untouched, a skip owners discover when mold odor returns within months.
Our Main Herndon Services
Herndon homeowners call us most often for these three services, each with its own dedicated page.
Air Duct Cleaning in Herndon
We clean every duct run in Herndon’s townhome and condo systems, including the branch lines through shared party-wall chases that rigid equipment misses. Our crews use flexible-shaft Rotobrush systems to reach tight configurations, and every job concludes with a Documented Photo Record of each run before and after. Air Duct Cleaning in Herndon covers full-system pricing and what to expect.
Dryer Vent Cleaning in Herndon
Dryer vents in Herndon’s multi-story townhomes often run long vertical routes through shared chases, collecting lint in elbows that standard brushes pass over. We bring flexible-shaft equipment and inspect with a camera to verify the full run is clear. Dryer Vent Cleaning in Herndon explains our process and pricing.
Duct Repair & Sealing in Herndon
Fiberglass duct board in Herndon’s 1980s-1990s housing stock cracks, delaminates, and leaks conditioned air into attics and wall cavities. We repair or replace deteriorated sections and seal joints with mastic, then photograph every repair. Duct Repair & Sealing in Herndon details when repair beats replacement.
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
HVAC cleaning in Herndon addresses equipment that has run for decades in fiberglass-lined duct systems, often without proper maintenance. The combination of aged duct board, humid summers, and dense pollen loads means evaporator coils and blowers here accumulate debris faster than in newer metal-duct suburbs. HVAC Cleaning covers our full equipment roster and standards.
Evaporator Coil Cleaning
Signs you need it
Ice buildup on the coil, weak airflow from registers, or musty odor when the AC first cycles on.
What it costs in Herndon
Evaporator coil cleaning in Herndon typically runs $180-$340.
How we do it
We access the coil through the plenum (the air distribution box), apply foaming cleaner, rinse with low-pressure water, and photograph before and after through the access panel.
Blower Cleaning
Signs you need it
Vibration or noise from the air handler, uneven heating or cooling between floors, or dust puffing from registers at startup.
What it costs in Herndon
Blower cleaning in Herndon typically runs $160-$280.
How we do it
We remove the blower assembly, clean the wheel and housing with compressed air and solvent, balance the assembly, and reinstall with a photo record of the cleaned components.
What HVAC Cleaning Costs in Herndon
| Item | Typical range in Herndon |
|---|---|
| Evaporator coil cleaning | $180-$340 |
| Blower cleaning | $160-$280 |
| Full HVAC system cleaning | $380-$620 |
How do I know my HVAC system needs cleaning, not just the ducts?
If your ducts are clean but rooms still heat unevenly, the blower or coil is likely clogged. We inspect both during every duct cleaning and report what we find with photos. Call (571) 520-6317 for a free estimate.
Will cleaning my HVAC equipment help with Herndon’s summer humidity?
A clean evaporator coil removes moisture more efficiently, but it cannot fix oversized equipment or poor duct sealing. We photograph the coil condition and note any secondary issues in our written report.
Air Quality & Sanitizing in Herndon
Air quality and sanitizing in Herndon targets mold and bacteria that thrive in the town’s aged fiberglass duct board during humid summers. The same porous material that traps condensation also harbors microbial growth that standard cleaning cannot reach without treatment. Air Quality & Sanitizing covers our full protocol and equipment.
Mold Treatment
Signs you need it
Musty odor when the system runs, visible dark staining at registers, or recurring odor within months of standard cleaning.
What it costs in Herndon
Mold treatment in Herndon typically runs $280-$480.
How we do it
We apply an EPA-registered antimicrobial through a fogging system into the duct runs, let it dwell per manufacturer spec, then extract residue with negative-pressure equipment and photograph treated areas.
UV Light Installation
Signs you need it
Repeated mold recurrence after treatment, or a household member with respiratory sensitivity to microbial allergens.
What it costs in Herndon
UV light installation in Herndon typically runs $320-$580.
How we do it
We mount a Honeywell or Guardsman UV-C lamp in the supply plenum, wire it to the blower circuit, and provide the installation photo and lamp replacement schedule in writing.
What Air Quality & Sanitizing Costs in Herndon
| Item | Typical range in Herndon |
|---|---|
| Mold treatment | $280-$480 |
| UV light installation | $320-$580 |
| Full air quality package | $450-$780 |
Does mold treatment damage fiberglass duct board?
Our antimicrobial is formulated for porous HVAC materials and applied at controlled pressure to avoid delaminating aged duct board. We inspect duct condition first and photograph any structural concerns before treating. Call (571) 520-6317 for an assessment.
How long does UV light take to work?
UV-C lamps begin reducing microbial growth immediately but need 2-4 weeks of continuous operation to show measurable air quality improvement; we include a 90-day follow-up inspection under the 365-Day Done Right Promise.
Brands We Service in Herndon
We stock parts and service equipment from Honeywell, Aprilaire, Rotobrush, and Guardsman, with most common filters, UV lamps, and sanitizing agents available without ordering delay. Our brands page lists full compatibility.
Pricing for Air Duct Cleaning in Herndon, VA
| Service | Typical range in Herndon |
|---|---|
| Air duct cleaning (whole system) | $320-$520 |
| Dryer vent cleaning | $140-$220 |
| HVAC system cleaning | $380-$620 |
| Evaporator coil cleaning | $180-$340 |
| Blower cleaning | $160-$280 |
| Condenser cleaning | $140-$240 |
| Mold treatment | $280-$480 |
| UV light installation | $320-$580 |
| Duct repair & sealing (per system) | $280-$640 |
| Air quality & sanitizing package | $450-$780 |
Herndon jobs cost more when duct board deterioration requires extra time for careful handling, or when shared-wall chases need specialized flexible equipment. Every price is written before work starts under Haven Standard Clause 1, with no per-vent add-ons or post-arrival upsells.
Neighborhoods We Serve in Herndon
We schedule Herndon appointments with route efficiency across these areas, typically offering appointments within 5-7 business days.
- Woodland Park
- McNair Farms
- Franklin Farm
- Dranesville Estates
- Herndon Parkway corridor
Service Area - Cities Near Herndon
CleanRun crews serve homeowners throughout the Dulles corridor, including Reston, VA, Sterling, VA, Chantilly, VA, and Fairfax, VA. Scheduling is coordinated from our Washington, DC office with local dispatch to each area.
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
No permit is required for standard residential duct cleaning in Herndon. If our inspection reveals duct repair or modification needs, we note any applicable Fairfax County requirements in our written scope before work begins.
Most Herndon appointments are available within 5-7 business days. We do not promise same-day dispatch, but we keep a waiting list for cancellations and call if an earlier slot opens.
Herndon’s townhome and condo HOAs typically require 24-48 hour notice for any service vehicle access but do not restrict the work itself. We provide written proof of insurance and technician identification on request.
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
"My allergies genuinely improved. They also told me the ducts did not need sealing, which I had been quoted for elsewhere."
- Petra K."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."The dryer vent was almost completely blocked with lint. They showed me the photograph and I understood immediately why the dryer had been running twice."
- Lucia M.