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.
Nikro Duct Repair & Sealing in Leesburg: What to Know First
CleanRun provides independent Nikro duct repair and sealing in Leesburg, with most jobs scheduled within a few business days and completed in a single visit. We are not affiliated with or authorized by Nikro. Written pricing is delivered before any panel comes off, and every duct run is photographed before and after.
This page is for Leesburg homeowners who have identified Nikro equipment in their HVAC system and need actual ductwork repair, sealing, or insulation, not a generic cleaning. If your duct runs are leaking at seams, your flex duct has collapsed behind a wall, or your metal trunk line has separated at a collar, we document the damage with a camera, quote a flat price for the repair, and back it with our 365-Day Done Right Promise. Call (571) 487-7204 for a free estimate.
How Nikro Products Fail - and How We Fix Them
- Nikro HP20 and HP20G portable air scrubbers: These units are often retrofitted into Leesburg basements and utility closets as negative-pressure extractors for duct cleaning jobs. The flexible intake hose, typically 10-inch diameter, fatigues at the collar connection after repeated flexing. We replace the hose section with a reinforced aftermarket equivalent rated to the same static pressure, or reseat the collar with mastic sealant and a mechanical clamp if the duct board is still sound.
- Nikro SL4000 and SL5000 air duct cleaning systems: The vacuum hose assemblies on these truck-mounted units create significant back-pressure on the return plenum when connected to residential ductwork. In Leesburg homes built 2015-2020, we’ve found the connection collar on the plenum itself loosens over time, creating a leak that the homeowner mistakes for a general duct problem. We reseal the plenum collar with fiberglass mesh and mastic, then pressure-test the repair.
- Nikro flex duct adapters: The transition fittings supplied with older Nikro cleaning systems are often installed as permanent adapters in crawl spaces. The thin-gauge metal crimps at the flex-to-metal junction, especially in the humid summers near the Potomac, where condensation accelerates corrosion. We cut back to sound metal, install a heavier-gauge collar, and seal with UL 181-rated mastic, not foil tape alone.
- Nikro insulated duct sleeves: When used as part of a sanitizing or air-quality upgrade, the fiberglass insulation sleeve can sag if the support wire spacing exceeds 4 feet, which we’ve seen in several Idylwood and Lansdowne installations. The sag creates a cold spot that drips condensation onto ceiling drywall. We reinstall with proper support spacing and add a vapor-barrier patch where the insulation jacket has torn.
- Nikro vacuum collection bags and housing seals: The gasket between the collection drum and the vacuum head hardens after two to three years of heat cycling. On systems we service in Leesburg, this leaks fine particulate into the mechanical room, which then gets drawn back into the return. We replace the gasket with an OEM-spec silicone unit and verify the seal with a smoke pencil test.
Our Nikro Duct Repair & Sealing Process

- 1
Camera inspection first. We run a borescope through every accessible duct run to locate the failure. The camera goes in before the quote comes out. You see the still frames before we discuss scope.
- 2
Written price delivered. Haven Standard Clause 1: the full repair cost, flat per system, is written and agreed before any work starts. No per-vent add-ons, no trip-charge surprises.
- 3
Parts decision documented. For Nikro-specific components, we note whether we’re using OEM gaskets and collars or quality aftermarket equivalents rated to the same pressure and temperature specs. You get this in writing.
- 4
Repair and seal. We execute the repair, whether that’s mastic sealing, collar replacement, flex duct reconstruction, or insulation reinstall. Every seam is brushed with UL 181 mastic and mechanically supported where code requires.
- 5
Pressure verification and photo record. We test static pressure at the air handler and photograph every repaired run. The photo record, pressure readings, and warranty document are delivered as standard.
- 6
365-Day Done Right Promise activated. Backed in writing on every job. If the seal fails or the repair doesn’t hold, we make it right.
Before
AfterWhat Nikro Duct Repair & Sealing Costs in Leesburg
| Repair Type | Typical Range | What Moves the Price |
|---|---|---|
| Single flex duct section repair/replace | $340 - $580 | Length of run, attic vs. crawl space access, whether the inner liner is torn |
| Metal trunk line collar reseal (1-2 joints) | $280 - $460 | Diameter of trunk, extent of corrosion, need for collar replacement vs. reseal only |
| Plenum connection repair | $320 - $520 | Size of plenum, fiberglass vs. metal construction, accessibility |
| Insulation sleeve reinstall with vapor barrier | $260 - $440 | Linear feet, R-value of replacement insulation, extent of moisture damage to surrounding area |
| Full system seal (mastic on all accessible joints) | $680 - $1,240 | Number of runs, square footage of home, whether registers need resealing |
These are whole-system prices, not per-vent teaser rates. The exact number for your Nikro system comes after our free inspection. Call (571) 487-7204 and we’ll put it in writing.
Why Leesburg Homeowners Call CleanRun Air Duct Cleaning Leesburg for Nikro Work

We’ve been in Leesburg since 2013, and the crew Tomas Reyes runs has handled Nikro equipment in everything from 1980s split-levels near Fort Evans to new construction off Sycolin Road. The 365-Day Done Right Promise is backed in writing, not mentioned and forgotten. Every technician is background-checked and uniformed under Haven Standard Clause 3: Verified Crews. We also service Lennox, Trane, and Carrier systems, so if your repair reveals a broader compatibility issue, we don’t hand you off.
The documented photo record matters more for Nikro jobs than most brands, because much of their equipment is installed as aftermarket upgrades by prior contractors. When we open a system, we often find three installation eras layered together. We photograph each one, explain what we’re touching and what we’re leaving alone, and you get the files as part of the standard deliverable.
FAQs
No, because Nikro warranties its air duct cleaning and remediation equipment, not the residential ductwork it connects to. Your home’s duct system is separate from any Nikro machine that may have been used to clean it. We document our repair scope in writing so there’s no confusion about what was altered. Call (571) 487-7204 if you need help interpreting prior installation paperwork.
We source OEM gaskets, collars, and adapter rings when they’re available and cost-effective. For flex duct transitions and standard mastic applications, we use quality aftermarket components rated to the same UL and ASTM standards. We list exactly what’s going in before we start. Bring a competitor’s quote and we’ll put our parts list next to it in writing, free of charge.
Replacement makes sense when the duct board is delaminating, metal trunk lines show pinhole corrosion across more than 30% of the surface, or flex duct inner liners are torn at multiple points. Repair is viable for isolated collar separations, single-section flex damage, or seal failures in otherwise sound metal. Our camera inspection shows you which condition applies. Call (571) 487-7204 for the inspection, which is free.
Most single-point repairs, like a collar reseal or one flex duct section replacement, are completed in two to four hours. Full system sealing in a larger Leesburg home may extend to a full day. We schedule accordingly and confirm the time estimate when we deliver the written price.
The $79-$149 duct cleaning coupon model relies on upselling once the truck is on your driveway. The actual sealing work, if it happens at all, is often a quick blast of spray sealant with no camera verification. Our price is flat, agreed in advance, and includes the photo record that proves the work was done. If you have a written estimate from another contractor, we’ll provide a free second opinion with our number next to theirs.
Written by Tomas Reyes, Owner, CleanRun Air Duct Cleaning Leesburg at CleanRun Air Duct Cleaning Leesburg, serving Leesburg and nearby areas.




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