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
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A dryer vent inspection in Rockville, MD typically costs $79-$149 and takes 30 to 45 minutes. A technician runs a flexible camera through the entire vent run – from the back of the dryer to the exterior termination cap – and delivers a written finding report with photographs before recommending any work. If the vent is clear and functioning correctly, that’s what the report says.
Most Rockville homeowners call us about a dryer that’s taking two cycles to dry a single load. Sometimes that’s lint accumulation that Dryer Vent Cleaning services would address. Sometimes it’s a crushed flex duct behind the dryer that’s been pinched since the appliance was installed. Sometimes it’s a termination cap that frosted shut over winter and never fully reopened. The only way to know which problem you’re actually dealing with is a camera inspection – not a guess based on how long the vent run is or what the last technician assumed.
CleanRun Air Duct Cleaning Rockville has documented the inside of dryer vent runs in homes across Rockville since 2013, from the older split-levels in Twinbrook to newer construction in King Farm and the townhomes along Veirs Mill Road. Our Vent Cleaning process means every inspection concludes with a written price for any recommended follow-up work before a single cleaning tool comes out of the truck. That’s Haven Standard Clause 1, and it applies to every job we run.
To schedule an inspection or ask about our Dryer Vent Cleaning in Rockville service, call us at (240) 255-4519. A live person answers every call.
When You Need a Dryer Vent Inspection
Some of these signs are obvious. Others are subtle enough that homeowners in Rockville have lived with them for a year before realizing something is wrong.
- Clothes take more than one cycle to dry. This is the most common call we get from Rockville homes, especially those with longer vent runs – anything over 15 feet is more prone to lint accumulation at elbows, and many townhomes in Fallsgrove and Bauer Drive run vents 20 feet or more through interior walls before reaching an exterior wall.
- The dryer exterior or laundry room feels unusually hot. When exhaust airflow is restricted, heat backs up into the drum and into the room. A dryer that’s running hot is working harder than it should, and the wiring and heating element wear faster under that load.
- You haven’t had the vent inspected in more than two years. The National Fire Protection Association recommends annual dryer vent cleaning for average-use households. An inspection first tells you whether cleaning is actually needed – or whether a damaged section of ductwork is the real issue.
- You can see debris, nesting material, or damage at the exterior cap. Rockville’s older neighborhoods – particularly around Twinbrook and the Red Farm Road corridor – see frequent bird nesting in exterior termination caps between March and June. A cap that looks fine from the outside can be almost completely blocked inside.
- A burning or musty smell during a drying cycle. A burning smell points to lint contact with the heating element. A musty smell often means moisture is not venting properly and mildew is building up inside the duct. Either finding gets documented in the camera record and explained in plain language before we talk about next steps.
- The dryer was recently moved or reinstalled. Any time an appliance is repositioned – for flooring work, a laundry room renovation, or a new dryer installation – the flex connection behind the unit is at risk of being kinked or improperly reattached. A quick inspection confirms the connection is sound and the duct run is clear before the dryer goes back into regular use.
Our Dryer Vent Inspection Process
Here is exactly what happens when a CleanRun technician arrives at a Rockville home for a dryer vent inspection. Nothing is skipped, and nothing is added without a written price and your approval first.
- Pre-inspection walkthrough and written scope. Before any equipment comes off the truck, the technician identifies the dryer location, traces the vent path to the exterior termination point, and confirms the written inspection price with you. Haven Standard Clause 1: written price first, always. The technician also notes the dryer make, model, and approximate vent run length for the job record.
- Exterior termination cap evaluation. The technician checks the cap for physical damage, blockage, bird or rodent nesting material, frost damage, and whether the damper is opening and closing freely. In Rockville, we see a high rate of louvered plastic caps that have warped or cracked after several winters – they look intact from ten feet away and are nearly inoperable up close. Findings are photographed before anything is touched.
- Camera pass through the full duct run. A flexible inspection camera travels the complete length of the vent run – from the dryer transition duct at the appliance to the exterior cap. The camera captures lint accumulation depth, any visible crimping or collapse of the duct wall, elbow conditions, and any foreign material. In homes with long or multi-elbow runs, this is the only reliable way to identify where a restriction is actually located. All footage and still frames are saved to the job record.
- Airflow measurement at the termination point. A technician uses a flow meter to measure exhaust velocity at the exterior cap with the dryer running. The measurement tells us whether airflow meets the minimum threshold for safe dryer operation. If the number is low, the camera record typically shows exactly where the restriction is – so you’re not guessing.
- Written findings report with photographs. Every inspection ends with a written report that names what was found, where it was found, and what – if anything – needs to happen next. If the vent is clear, the report says that. If there’s a 4-inch lint accumulation at the second elbow, the report shows you the photograph and the measurement. This is a CleanRun standard deliverable on every inspection, not something you have to ask for.
- Written price for any recommended work – before we start. If the inspection finds a condition that warrants cleaning, repair, or cap replacement, the technician prepares a written price on the spot. You review it, approve it or decline it, and the truck does not move until you’ve made that decision with full information in hand. This is not a conditional offer. The 365-Day Done Right Promise covers any work you approve: if it’s not done right, Tomas Reyes and the CleanRun team make it right, in writing, no manager approval required.
Before
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Dryer vent inspection in Rockville costs $79-$149 for most residential properties. Here’s how that range breaks down and what moves the number, and see How Much Does Dryer Vent Cleaning Cost? (2026 Price Guide) - Rockville, MD for full pricing details.
| Inspection Type | Typical Price Range |
|---|---|
| Standard single-story vent run (up to 15 ft) | $79-$99 |
| Multi-story or long-run inspection (15-35 ft) | $99-$129 |
| Complex routing (multiple elbows, interior wall run, or hard-to-access cap) | $119-$149 |
| Inspection + same-day full vent cleaning (when needed) | Starting at $189 |
Three factors move the price within those ranges:
- Vent run length and routing complexity. A 10-foot straight run through an exterior wall in a Rockville rancher takes less time and equipment than a 30-foot multi-elbow run through two floors of a King Farm townhome. The camera time and airflow measurement are the same either way – the price reflects access difficulty, not effort corners cut.
- Exterior cap location. A cap at ground level is straightforward. A cap on a second-story exterior wall or a rooftop penetration adds time and, in some cases, equipment. The written price you receive accounts for actual cap location – not a standard assumption.
- Whether cleaning is needed same day. If the camera shows a blockage and you want it cleared during the same visit, the inspection price applies toward the cleaning total. You don’t pay for both in full – the inspection work you’ve already paid for counts toward the next step.
There is no “call for a quote” at CleanRun. The written price is given before any work begins, every time. If you have a competitor’s written estimate, bring it. We put our number next to it in writing – that’s our Free Second Opinion offer, at no cost to you.
Call (240) 255-4519 to get your written inspection price scheduled. Estimates are confirmed before we arrive, not on the fly when we get there.
What the Camera Actually Finds in Rockville Homes
Twelve years of dryer vent inspections across Rockville’s neighborhoods have produced a pretty consistent set of findings. We’re not listing these to create alarm – we’re listing them because they’re the things the camera actually records, and a customer who knows what to look for in the written report is a customer who can make a better decision.
In Twinbrook and the older East Rockville neighborhoods, the most common finding is metallic flex duct that has partially collapsed where it transitions behind the dryer. The duct was code-compliant when it was installed in the 1970s or 1980s. Forty-plus years of vibration and heat cycling leave a duct that photographs as a significant restriction even when there’s very little lint present.
In the King Farm and Fallsgrove developments – built mostly between 1999 and 2010 – we regularly find foil accordion flex duct that was installed during original construction and has developed kinks at one or more elbows. These kinks don’t show up in a visual inspection from behind the dryer. The camera shows them clearly. The fix is usually a short section of rigid aluminum duct and two new elbow fittings – a documented finding with a written repair price, not a vague recommendation to “replace the flex duct.”
Across Rockville generally, the most consistent finding we document from November through March is exterior cap damage from freeze-thaw cycling. A plastic louvered cap that was installed at a reasonable quality level will typically last seven to ten winters before the damper stops seating properly. After that, cold air back-drafts in when the dryer is off and the duct interior runs cooler than it should, which accelerates lint adhesion at every interior surface.
All of this is photographed. All of it goes into the written report. And none of it triggers a repair recommendation without a corresponding price in writing first.
FAQs – Dryer Vent Inspection in Rockville
How much does a dryer vent inspection cost in Rockville, MD?
A dryer vent inspection in Rockville costs $79-$149 depending on vent run length, routing complexity, and exterior cap accessibility. The written price is confirmed before the technician starts. If a cleaning is needed and you approve it the same day, the inspection fee applies toward the total. Call (240) 255-4519 and we’ll give you a written number before we schedule the visit.
How is a dryer vent inspection different from dryer vent cleaning?
An inspection uses a flexible camera and airflow measurement to document the condition of the vent run – finding out what’s actually there before any cleaning tool touches it. Cleaning removes what the inspection found. The two are related but separate: an inspection can confirm your vent is clear and doesn’t need cleaning, which saves you the cost of a cleaning you didn’t need. At CleanRun, the inspection always comes first, with its own written findings report. If cleaning is warranted, you’ll see the photographic evidence before we ask you to approve the next step. You can read more about the full scope of work on our Dryer Vent Cleaning in Rockville page.
How often should a dryer vent be inspected in a Rockville home?
An annual inspection is appropriate for most Rockville households using a dryer four or more times per week. Homes with longer vent runs – common in townhomes throughout Fallsgrove, King Farm, and the Bauer Drive corridor – or households with large families or pets benefit from inspecting every 12 months without exception. Homes where the dryer is used less frequently can often go 18 to 24 months between inspections, but only after a baseline inspection establishes that the duct materials and termination cap are in good condition.
Can I inspect the dryer vent myself?
You can check two things without any equipment: whether the exterior cap opens freely when the dryer runs, and whether the transition duct behind the dryer is kinked or crushed. Those checks take about two minutes and are worth doing. What you can’t see without a flexible inspection camera is what’s happening at each elbow inside the wall – which is exactly where lint accumulates first and where duct damage is most common. A dryer vent that photographs clean from behind the dryer and at the cap can have a significant blockage at an interior elbow 12 feet in. The camera is the only way to know for certain, and it’s the basis for every written finding CleanRun delivers.
Why CleanRun for Dryer Vent Inspection in Rockville
Since 2013, CleanRun has completed dryer vent inspections in more than 52,000 homes across the region, every one with a written price before work started and a documented photo record when the crew left. Tomas Reyes built the company around a simple premise: if you can’t show a customer what you found, you haven’t earned the right to recommend what comes next.
Every CleanRun technician is background-checked, uniformed, and identified by name before arriving at your door – Haven Standard Clause 3: Verified Crews. The written report from your inspection is yours to keep. If you want a second opinion on any finding, the Free Second Opinion is available at no cost – bring any written estimate from a competitor and we put our number next to it in writing.
The 365-Day Done Right Promise covers every job we complete. If the work isn’t right, we make it right. That’s a written commitment, not a line in a terms document that requires manager approval.
We use professional-grade inspection equipment – including Nikro camera systems built for duct diagnostics – so the image quality in your photo record is clear enough to show your appliance repair technician or your home inspector without explanation. What the camera recorded is what the report shows.
Rockville homeowners looking for a documented, written-first inspection process – no surprises, no verbal estimates, no work until you’ve approved a written price – can reach us at (240) 255-4519. Our home page has the full list of services we cover across the area if you want to review the scope before calling.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Rockville, serving Rockville.