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
AfterDryer Vent Inspection in Herndon, VA
A dryer vent inspection in Herndon typically takes 30 to 45 minutes and costs between $79 and $149, depending on vent length and accessibility. A trained technician runs a camera through the full duct path, documents every obstruction, bend, and connection point, and delivers a written scope with photographs before any cleaning or repair work is recommended. If you want to know what is actually inside your dryer vent rather than guessing, call (571) 520-6317 – a live person answers every call.
At CleanRun Air Duct Cleaning Herndon, inspection is not a sales step disguised as a service. It is the first thing we do on every dryer vent job, and the findings – captured with a camera and delivered to you as a documented photo record – determine every recommendation that follows. Tomas Reyes built CleanRun around that principle in 2013, and it has not changed across the 52,000+ homes we have served since. Our Dryer Vent Cleaning in Herndon service begins with this inspection so that the written price you receive before any work starts is based on what the camera actually shows, not on a flat rate that ignores your specific duct path.
Herndon’s housing stock creates some specific inspection challenges worth naming directly. The townhome clusters along Elden Street and the single-family neighborhoods near Sugarland Run were largely built between 1978 and 1995, and many of those dryers were installed against interior walls – meaning the vent path turns multiple times before it exits through the rim joist or a side wall. Longer, multi-elbow runs trap lint at each bend, and those bends are exactly where our camera finds the most significant build-up. Homes built more recently in the Worldgate and Dulles South corridors tend to have shorter runs but are more likely to use flexible foil duct that accordion-folds on itself over time, creating a different kind of restriction. Neither problem is obvious from the outside. That is why the inspection exists.
When You Need a Dryer Vent Inspection
- Your dryer takes more than one cycle to dry a normal load. A full drum of towels should dry in roughly 45 minutes on a properly vented dryer. If you are running a second cycle as a habit, restricted airflow is the most common explanation – and the only way to confirm that is to look inside the duct.
- The exterior vent hood flap barely moves when the dryer runs. The flapper on your outdoor termination point should open fully and stay open throughout a cycle. In Herndon winters, a partially closed or ice-blocked termination cap is common – we see it frequently in homes near Folkstone and the older sections of Fox Mill – and it causes back-pressure that overheats the dryer’s heating element.
- You can feel heat on the wall or floor behind the dryer cabinet. Surface heat outside the cabinet often means the duct connection at the back of the dryer has separated or the flexible transition duct has developed a kink. A camera confirms whether the duct is intact before you replace any components.
- A burning or musty smell appears when the dryer runs. Lint heated past a certain point produces a detectable odor well before ignition. A musty smell often means moisture is not escaping the duct path properly – either the vent terminates into a soffit or crawl space instead of outdoors, or a section of duct has sagged and is holding condensate. Both are fire-code violations in Fairfax County.
- It has been more than 12 months since the duct was last inspected or cleaned. The National Fire Protection Association recommends annual dryer vent inspection and cleaning for standard household use. Herndon households that use high-capacity dryers or wash large items – sports gear, bedding, pet blankets – often need inspection more frequently than once a year.
- The dryer has recently been moved, reinstalled, or the home was renovated. Any time the duct connection is disturbed, there is a real chance the transition duct was reconnected with the wrong fitting, left without foil tape, or partially kinked behind the cabinet. An inspection after any appliance move is the only way to confirm the duct is sealed and unrestricted.
Our Dryer Vent Inspection Process
Every inspection follows the same documented sequence. Nothing is skipped based on how the vent looks from the outside, and no recommendation is made before the camera has traveled the full duct path.
- Written scope and price before any work starts. Under Haven Standard Clause 1, the technician delivers a written price for the inspection before opening a panel, removing the dryer, or inserting any equipment. The price you see at that point is the price on your invoice. There are no add-ons discovered mid-job.
- Exterior termination assessment. The technician locates the outdoor vent hood – on a side wall, through the rim joist, or on a roofline – and checks the flapper action, screens, and clearance from grade. In Herndon, rooftop terminations on two-story Craftsman-style homes in the McNair Farms area are a specific concern: bird nests establish themselves in these caps between spring and early summer, and a camera from the exterior confirms whether the termination is clear before the indoor portion of the inspection begins.
- Transition duct inspection at the dryer connection. The technician carefully pulls the dryer away from the wall and inspects the flexible transition duct – the short section connecting the dryer’s exhaust port to the rigid duct in the wall. This is where the most preventable failures occur: crushed foil duct behind the cabinet, missing foil tape at the wall collar, or a transition section that was never replaced after a previous dryer swap. The camera documents the connection point and the condition of the first few feet of rigid duct.
- Camera run through the full duct path. Using a flexible inspection camera, the technician travels the complete duct path from the dryer connection to the exterior termination. The camera captures video and still photographs at every elbow, joint, and transition point. Specific findings – debris depth at bends, joint separation, evidence of moisture, and duct material type – are noted in writing at this stage. In Herndon townhomes with vertical duct runs through interior walls, this step often reveals lint compaction at the upper elbow that a standard shop-vac cleaning would never reach.
- Airflow measurement. After the camera run, the technician measures airflow at the exterior termination using a calibrated anemometer. A clear 4-inch round dryer duct should deliver approximately 200 cubic feet per minute at the termination. Readings below that threshold correlate directly to extended dry times and elevated cabinet temperatures. The measured reading is recorded on the inspection report alongside the camera findings.
- Documented photo record delivered to you. The inspection concludes with a photo record – before images from the camera run, the airflow reading, and a written summary of findings – delivered to you before the technician leaves. If cleaning or repair is needed, the written recommendation and price come with it. You decide what happens next. Nothing starts without your written approval.
BeforeAfterDryer Vent Inspection Pricing in Herndon
Dryer vent inspection in Herndon runs between $79 and $149 for most residential jobs. That range covers the full inspection process described above, including the camera run, airflow measurement, and documented photo record. The exact price depends on a few factors that the technician confirms before quoting.
| Factor | Typical Price Impact |
|---|---|
| Standard single-story run (up to 15 ft) | $79 – $99 |
| Multi-story or interior-wall run (15 to 35 ft) | $99 – $129 |
| Complex multi-elbow path or rooftop termination | $129 – $149 |
| Inspection bundled with full dryer vent cleaning | Inspection fee waived or applied to cleaning price |
A few things that do not change regardless of duct length or complexity: you receive a written price before any work begins (Haven Standard Clause 1), you receive the documented photo record at the end of every inspection, and the job is covered by the 365-Day Done Right Promise. If you bring a written estimate from another company, we put our own number next to it in writing – free second opinion, no appointment required beyond a phone call to (571) 520-6317.
If the inspection finds a condition that warrants Dryer Vent Cleaning services or repair, those are priced separately and in writing before any additional work begins. An inspection finding never automatically becomes a cleaning charge. The two services are distinct, and you approve each one independently.
What CleanRun Finds in Herndon Dryer Vents
After inspecting dryer vents across Herndon since 2013 – in the Colonial-era rebuilds near downtown, the mid-century ramblers in Kingsley Park, and the newer construction along Herndon Parkway – a few conditions show up often enough to be worth describing directly.
Flexible foil duct installed in place of rigid aluminum is probably the most common finding. It is less expensive to install and easier to route around tight spaces, which is why builders used it widely through the 1990s and into the 2000s. The problem is that foil duct collapses over time, especially when the dryer is pushed back against it. A collapsed section reduces airflow the same way a kinked garden hose does, and no amount of cleaning fixes a physically crushed duct. The camera shows this immediately; a shop vac would not detect it at all.
Bird nests at exterior terminations are a seasonal finding. Our technicians see them most often in April through June, when starlings and house sparrows are actively nesting. A nest at the termination cap creates a complete airflow blockage, and the duct behind it fills with heat and moisture that has nowhere to go. Homes with rooftop or high-sidewall terminations in the Worldgate and Dulles South neighborhoods tend to see this more than homes with low sidewall caps, simply because of proximity to tree canopy.
Joint separations inside finished walls are less obvious and more consequential. When a duct connection inside a wall comes apart – either from vibration over years of dryer operation or from a too-tight elbow installed at rough-in – the exhaust vents into the wall cavity rather than outdoors. The camera finds this when the airflow reading at the exterior termination is significantly lower than expected relative to the duct length. Fairfax County building code requires dryer vents to terminate outdoors; a duct venting into a wall cavity is a code violation and a moisture problem regardless of where the lint goes.
We document every one of these findings with photographs before making any recommendation. The equipment we use – including Rotobrush camera systems and Nikro extraction equipment when Vent Cleaning follows the inspection – produces images detailed enough to show debris depth in millimeters and duct wall condition at every joint. Those images are yours to keep as part of the standard job record.
FAQs – Dryer Vent Inspection in Herndon
How long does a dryer vent inspection take in Herndon?
A dryer vent inspection in Herndon takes 30 to 45 minutes for most single-story or townhome configurations. Multi-story homes with interior-wall duct paths – common in the older neighborhoods near Herndon’s historic downtown and in the Fox Mill area – can take up to 60 minutes because the camera run covers more distance and documents more connection points. The technician gives you a time estimate when they deliver the written price, before any work begins. Call (571) 520-6317 and we can give you a time range based on your specific home layout before you book anything.
Is a dryer vent inspection the same as dryer vent cleaning?
No. Inspection and cleaning are two separate services with separate prices. Inspection uses a camera to document the condition of the full duct path and measure airflow – it produces a written record of what is inside the duct, not a cleaned duct. Cleaning uses negative-pressure extraction and rotary brush equipment to remove lint and debris after the inspection documents what needs to be removed. Some conditions found during inspection – like a separated joint or a collapsed duct section – require repair rather than cleaning, and no amount of cleaning would correct them. The inspection tells you which service, if any, is actually needed. Our full Dryer Vent Cleaning in Herndon page explains what cleaning covers and how it is priced separately.
Can a dryer vent inspection be done without moving the dryer?
The exterior termination can be assessed without moving the dryer, but a complete inspection – the kind that documents the full duct path and the connection at the dryer collar – requires the dryer to be pulled away from the wall. That step takes about five minutes and is included in the inspection price. Skipping it means the first few feet of duct, which is where transition-duct failures and connection separations most often occur, go undocumented. An inspection that does not cover the full path is not a complete inspection. CleanRun does not offer partial inspections because a partial inspection produces an incomplete record, and an incomplete record is not worth delivering to a customer.
What happens if the inspection finds a problem?
If the camera finds a condition that needs attention – lint build-up past a safe depth, a collapsed duct section, a separated joint, or a blocked termination – the technician documents it in the photo record and writes a separate price for the recommended repair or cleaning. That written price is handed to you before any additional work begins. You decide whether to approve it, take the photo record to another company for a second opinion, or do nothing. The 365-Day Done Right Promise applies to any work you approve and CleanRun performs: if it is not right after we leave, we make it right – that is in writing on every job, not a verbal assurance. Call (571) 520-6317 to schedule an inspection or get a written estimate side-by-side with any quote you already have.
Schedule a Dryer Vent Inspection in Herndon
If you want a documented record of what is inside your dryer vent – not a sales pitch based on what someone heard through a wall – call (571) 520-6317. A live person answers every call. Tomas Reyes and the CleanRun team serve Herndon and the surrounding Fairfax County area. The written price comes before the work, the photo record comes with the job, and the 365-Day Done Right Promise is on every invoice. If you have a written estimate from another company, bring it. We will put our number next to it in writing at no charge. That offer does not expire and does not require a separate appointment.
CleanRun Air Duct Cleaning Herndon is independently owned and operated under the H.A.V.E.N. Standard. Every technician is background-checked, uniformed, and identified by name before arrival (Haven Standard Clause 3). The home page has the full list of services and credentials if you want to verify anything before calling.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Herndon, serving Herndon.