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.
Abatement Technologies Coil Cleaning: The Ashburn Owner’s Guide
Abatement Technologies coil cleaning in Ashburn typically runs $340-$580 for a complete evaporator or condenser coil service, including full system inspection and photo documentation. We stock Abatement Technologies-compatible cleaning agents, foaming tools, and replacement coil fins for same-day dispatch across Loudoun County. Most Ashburn homeowners discover their coil needs attention when airflow drops noticeably or their energy bill spikes between seasons - the coil’s aluminum fins are either clogged with debris or corroded from the region’s hard water and pollen load.
Which Abatement Technologies Models This Applies To
Abatement Technologies builds coil systems across several HVAC lines, and the cleaning approach differs by series. The CAP600 and CAP1200 negative-air machines - common in Ashburn’s 2015-2022 construction - use flat, wide-pitch coils that trap construction debris but clean relatively straight. The HEPA-AIRE and PREDATOR series run tighter fin spacing, 8-14 fins per inch depending on the model year, which demands lower-pressure foaming to avoid fin compression. Check the data plate on the unit housing: the model prefix tells you the series, and the suffix digits indicate coil dimensions.
We carry OEM Abatement Technologies foaming cleaner and factory-spec fin combs, plus aftermarket equivalents from Guardsman that meet the same pH-neutral spec for aluminum coils. For units still under warranty, OEM cleaner preserves coverage. For out-of-warranty systems, the Guardsman equivalent performs identically in our documented photo records - we’ve run both side-by-side in Ashburn townhomes near Loudoun Station and found no visible difference in debris removal at the 30-day mark. Measure your coil depth before calling: 1.5-inch, 2-inch, and 3.5-inch coils each need matched fin combs, and using the wrong one straightens fins unevenly, which restricts airflow worse than the original clogging.
Signs Your Abatement Technologies Coil Cleaning Is Failing

- Weak airflow from registers even with a new filter. The evaporator coil sits above the furnace in the plenum - the main trunk that distributes conditioned air - and when its fins are packed with dust or biological growth, air can’t pass through at design volume. We see this most often in Ashburn homes with MERV 13 filters that were never changed on schedule; the filter loads up, bypass air carries debris straight to the coil.
- Ice formation on the refrigerant lines or coil housing. A dirty coil can’t absorb heat effectively, so refrigerant stays too cold and freezes condensation on the lines. In Northern Virginia’s humid summers, this ice builds fast and can crack the copper tubing if the cycle repeats. The camera usually shows a mat of pollen and pet hair bonded to the fins by condensation.
- Unexplained energy bill increases of 15-30%. The compressor runs longer to hit thermostat setpoints because heat transfer across the coil is degraded. Ashburn’s summer cooling loads are already high; a fouled coil pushes systems into near-continuous operation during July and August.
- Musty or sour odors when the blower kicks on. Organic growth on the coil - mold, mildew, or bacterial slime - produces volatile compounds that the airstream carries into living spaces. Abatement Technologies coils with drain pan issues are especially prone to this; standing water in the pan feeds growth on the coil underside.
- Water stains on the ceiling below the air handler. A dirty coil sheds debris into the drain pan, where it clogs the condensate line. The pan overflows, and in vertical installations common in Ashburn’s basement mechanical rooms, that water finds the drywall seam directly below.
Before
AfterReplacement Cost & What’s Included
| Service | Price Range | What’s Included |
|---|---|---|
| Evaporator coil cleaning (in-place) | $340-$460 | System shutdown, coil foaming, fin straightening, drain pan flush, before/after photo record |
| Condenser coil cleaning (outdoor unit) | $280-$380 | Refrigerant pressure check, coil foaming, fin combing, electrical connection inspection, photo record |
| Both coils (full system) | $520-$580 | Complete indoor and outdoor service, full system pressure test, documented photo record of both coils, 365-Day Done Right Promise |
| Coil fin replacement (when combing won’t restore) | $180-$260 additional | OEM or Guardsman-matched fin stock, precision installation, pressure verification |
The range depends on coil accessibility. Attic-mounted air handlers in Ashburn’s older Brambleton builds need platform work and additional safety setup. Basement units near One Loudoun’s townhome blocks are typically straightforward. Every price is written and agreed before we touch the unit - Haven Standard Clause 1, no exceptions. The 365-Day Done Right Promise covers the workmanship; if airflow tests don’t match our post-service baseline, we return and correct it at no charge.
DIY or Call Us?

There’s a safe middle ground and a hard stop. Homeowners can check the filter, verify the thermostat schedule, and inspect the condensate drain line for visible clogs - that’s it. The coil itself lives inside the plenum, and accessing it requires shutting down electrical power at the disconnect, removing sheet-metal panels, and working around 240-volt connections and sharp aluminum edges. More critically, improper foaming pressure bends fins permanently, and using the wrong cleaner - anything acidic or alkaline on aluminum - starts corrosion that shows up 18 months later as refrigerant leaks.
We document every coil with a borescope photo before touching it. I’ll show you the before photo first - then we can talk about what happens next. If you’ve already pulled the panel and found something you can’t identify, stop there. Call (240) 771-1508 and we’ll walk through what you’re seeing. If the unit is still running, a misidentified coil type or botched cleaning costs more than the service call would have.
FAQs
In Ashburn’s climate, a thorough coil cleaning typically maintains performance for 2-3 years, though homes near active construction or with pets may need annual service. The region’s oak and maple pollen season, running April through early June, loads coils fastest. Call (240) 771-1508 and we’ll set a schedule based on your system’s documented condition.
No - “repair” isn’t the right term for coil contamination. The fins aren’t broken; they’re obstructed or corroded. Cleaning removes obstruction; corrosion damage requires fin replacement or full coil swap, which we price separately after inspection. Our photo record shows you which category you’re in before any work starts.
A single evaporator or condenser coil cleaning takes 90 minutes to 2 hours on-site, including setup, service, pressure verification, and photo documentation. A full system - both coils - runs 3-4 hours. We don’t rush the dwell time on foaming agents; cutting that short leaves debris bonded to the fins.
Yes - we carry Abatement Technologies OEM foaming cleaner, pH-neutral rinse, and factory-spec fin combs on every truck, plus Guardsman-compatible alternatives. We also stock replacement fin stock for the CAP600, CAP1200, HEPA-AIRE, and PREDATOR series. If your unit needs a component we don’t have, we source it next-day from our Fairfax supplier; we don’t substitute without written approval.
CleanRun Duct Repair & Cleaning is an independent service provider; we are not affiliated with Abatement Technologies. We also stock parts and perform coil cleaning for Lennox, Trane, and Carrier systems.
Ready to see what’s actually inside your coil? Call (240) 771-1508 for a free, written estimate. We’ll photograph the coil before touching it, price the service in writing before any work begins, and deliver a documented photo record when the crew leaves - every time, under the H.A.V.E.N. Standard.
Written by Tomas Reyes, Owner, CleanRun Air Duct Cleaning Ashburn at CleanRun Air Duct Cleaning Ashburn, serving Ashburn and nearby areas.




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