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 $350-$650 for a whole-system service, with air quality and sanitizing treatments adding $200-$450 depending on whether mold treatment or UV light installation is needed. We’re CleanRun, and we dispatch crews to Herndon from our Washington, DC office to handle the specific problems this town’s housing stock and location create: original flex duct from the 1980s and 1990s tech boom, jet exhaust particulates from Dulles flight paths, and humidity-driven mold in attic chases. Call (240) 255-4519 for a written estimate before any work starts.
Why Herndon Homes Are Different
Herndon sits immediately adjacent to Dulles International Airport, one of the busiest cargo and passenger airports on the East Coast. Homes along Route 28 and Herndon Parkway corridors take in elevated jet exhaust particulates and ultrafine particles that neighboring towns like Reston or Sterling, farther from flight paths, simply do not experience at the same level. The town’s residential core is dense townhome communities built during the late 1980s and 1990s Dulles tech-corridor boom, many still running original flex duct systems with degrading fiberglass liners that shed particles directly into conditioned air.
That housing format matters. Ductwork routes through tight, unconditioned attic chases where Northern Virginia’s summer dewpoints in the mid-60s to low 70s°F create persistent condensation. Freeze-thaw winters work duct joints loose, pulling in attic particulates. Technicians working the large townhome clusters near Herndon Parkway and Elden Street regularly find the original flex duct inner liner has delaminated, releasing fiberglass microfibers - a standard inspection point here, not an edge case.
Our Main Herndon Services
Herndon homeowners call us most often for these three services, each with its own dedicated Herndon page:
Air Duct Cleaning in Herndon
We clean the full duct network in Herndon townhomes, from the plenum - the distribution box where air enters the duct system - through every duct run to each register. Crews photograph the inside of every run before and after, documenting what the 30-40 year old flex duct and fiberglass duct-board actually contains. Air Duct Cleaning in Herndon covers the complete scope and pricing.
Dryer Vent Cleaning in Herndon
Dryer vent blockages are common in Herndon’s multi-story townhomes where long vent runs through interior walls create lint accumulation points that shorter suburban runs do not. We clear the full vent path and photograph the before-and-after condition. Dryer Vent Cleaning in Herndon has the full details.
Duct Repair & Sealing in Herndon
Herndon’s original flex duct systems now show the predictable failures of age: separated joints, collapsed sections in attic chases, and deteriorating seals that pull in unconditioned attic air. We repair or replace damaged sections and seal the system to spec. Duct Repair & Sealing in Herndon explains the full process.
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.
Before
AfterHVAC Cleaning in Herndon
HVAC cleaning in Herndon addresses what the local housing stock and climate produce: evaporator coils coated with the combined load of jet exhaust particulates, delaminated fiberglass liner debris, and humidity-driven microbial growth that standard filter changes never reach. The townhome format compounds this - systems are often squeezed into tight mechanical closets with limited access, making thorough cleaning a specialized job rather than a quick vacuum pass. Our HVAC Cleaning hub explains the full equipment roster and methodology.
Evaporator Coil Cleaning
Signs you need it
Ice buildup on refrigerant lines, weak airflow from registers, or musty odor when the AC cycles on in humid summer months.
What it costs in Herndon
Evaporator coil cleaning in Herndon typically runs $180-$320 for accessible units, with tight mechanical closets in older townhomes sometimes adding $50-$100 for the additional labor.
How we do it
We remove the coil assembly when possible, apply foaming cleaner formulated for aluminum fins, rinse with low-pressure water to avoid fin damage, and photograph the coil surface before and after.
Blower Cleaning
Signs you need it
Vibration or noise from the air handler, uneven airflow between rooms, or dust streaking from supply registers.
What it costs in Herndon
Blower cleaning in Herndon ranges from $150-$280 for standard residential blowers, with variable-speed and multi-stage units at the higher end due to disassembly complexity.
How we do it
We remove the blower assembly, clean the squirrel cage and motor housing with compressed air and solvent, balance the assembly on reinstallation, and run a current draw test to verify motor health.
What HVAC Cleaning Costs in Herndon
| Item | Typical range in Herndon |
|---|---|
| Evaporator coil cleaning | $180 - $320 |
| Blower cleaning | $150 - $280 |
| Full HVAC cleaning (coil + blower + cabinet) | $350 - $650 |
How do I know the HVAC cleaning was actually done?
Every job includes a Documented Photo Record of the coil and blower before and after, delivered as part of your standard job record - not available on request, included by default under Haven Standard Clause 2. Call (240) 255-4519 for an exact quote; estimates are free.
How often does HVAC cleaning really need doing in Herndon?
Given Herndon’s jet exhaust exposure and humidity, we inspect coils and blowers every 2-3 years for homes with original ductwork, sooner if you notice ice, odor, or reduced airflow. Call (240) 255-4519 to schedule.
Air Quality & Sanitizing in Herndon
Air quality and sanitizing in Herndon targets the specific contamination profile this location creates: ultrafine particles from Dulles flight operations, fiberglass microfibers from degrading 1980s-1990s duct liners, and mold colonies that establish in humid attic chases and spread through the duct network. The townhome density means one contaminated system can affect multiple connected units through shared wall cavities and return air pathways. Our Air Quality & Sanitizing hub covers the full treatment protocol.
Mold Treatment
Signs you need it
Visible mold around registers, persistent musty odor that intensifies when the system runs, or recent water intrusion in attic duct chases.
What it costs in Herndon
Mold treatment in Herndon runs $400-$750 for localized duct contamination, with whole-system treatments reaching $900-$1,400 when the plenum and multiple duct runs are involved.
How we do it
We apply EPA-registered antimicrobial through the duct system under negative-pressure extraction, treat the plenum and all accessible duct runs, and verify with post-treatment photo documentation.
UV Light Installation
Signs you need it
Recurring mold despite cleaning, chronic allergy symptoms that worsen seasonally, or a system located in a damp basement or crawl space.
What it costs in Herndon
UV light installation in Herndon ranges from $350-$600 for a single lamp at the coil, with dual-lamp systems and higher-output units for larger townhome installations at $550-$900.
How we do it
We mount a UV-C lamp in the supply plenum with sight-glass access for annual bulb inspection, wire to the air handler blower circuit for automatic operation, and include the first replacement bulb in the installation price.
What Air Quality & Sanitizing Costs in Herndon
| Item | Typical range in Herndon |
|---|---|
| Mold treatment (localized) | $400 - $750 |
| Mold treatment (whole system) | $900 - $1,400 |
| UV light installation (single lamp) | $350 - $600 |
Is mold treatment safe for fiberglass duct liners?
Our antimicrobial is formulated for fiberglass and metal duct surfaces; we inspect liner condition first and note any delamination in your written scope before treatment begins. Call (240) 255-4519 for an assessment.
Do UV lights actually work in Herndon’s humid climate?
UV-C at the coil surface prevents mold colonization where condensation is constant; it does not filter particles, so we pair it with source removal for Herndon’s particulate load. Call (240) 255-4519 to discuss configuration.
Brands We Service in Herndon
We stock parts and service equipment from Honeywell, Aprilaire, and Abatement Technologies, with filters, UV lamps, and antimicrobial solutions carried on every Herndon truck for same-visit completion. Our brands page lists the full equipment roster including Guardsman and Rotobrush.
Pricing for Air Duct Cleaning in Herndon, VA
| Service | Typical range in Herndon |
|---|---|
| Air duct cleaning (whole system) | $300 - $550 |
| Dryer vent cleaning | $120 - $220 |
| Evaporator coil cleaning | $180 - $320 |
| Blower cleaning | $150 - $280 |
| Full HVAC cleaning | $350 - $650 |
| Mold treatment (localized) | $400 - $750 |
| Mold treatment (whole system) | $900 - $1,400 |
| UV light installation | $350 - $600 |
Herndon jobs at the higher end typically involve the tight access of original townhome mechanical closets, degraded fiberglass liner requiring additional containment, or multi-stage equipment needing extended disassembly time. Every price is written and agreed before work starts, per Haven Standard Clause 1 - no exceptions, no add-ons after the truck arrives.
Neighborhoods We Serve in Herndon
We work across Herndon’s full residential core, from the original townhome clusters to newer infill near the Metro extension. Crews are dispatched from our Washington, DC office and typically arrive within standard Northern Virginia response windows.
- Herndon Parkway corridor townhomes
- Elden Street area
- Dranesville
- Franklin Farm
- McNair
Service Area - Cities Near Herndon
Our crews cover the full Dulles corridor and Northern Virginia interior suburbs. We regularly schedule alongside Reston, VA and Sterling, VA jobs, with Fairfax, VA and Leesburg, VA within standard dispatch range from the same office.
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; duct repair or replacement that modifies the HVAC system may need a county permit, and we handle the documentation as part of any repair scope. Call (240) 255-4519 and we’ll verify requirements for your specific job.
Most Herndon townhome HOAs require notification for exterior work or roof penetration but do not regulate interior duct access; we provide written scope documentation on request for HOA submission. Call (240) 255-4519 to discuss your community’s requirements.
Our dispatch notes your parking situation when you book; crews carry equipment for walks up to 200 feet and will confirm access details by text before arrival. Call (240) 255-4519 to arrange a time that works with your community’s loading zone rules.
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
"On time, professional, and explained what the readings meant without talking down to me."
- Warren E."They found a disconnected duct in the crawl space that had been dumping conditioned air under the house for years. Photographed it, quoted the repair, fixed it."
- Devon A."My allergies genuinely improved. They also told me the ducts did not need sealing, which I had been quoted for elsewhere."
- Petra K.