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
AfterFull System Cleaning in Rockville, MD
A full system cleaning covers every component that moves air through your home: supply ducts, return ducts, the air handler cabinet, blower assembly, evaporator coil housing, and every register grille. In Rockville, most homes we visit haven’t had this done since the HVAC system was installed – and the camera footage shows it. If you’re weighing whether a register-by-register vacuuming is enough versus a true full-system clean, it usually isn’t, and we’ll show you exactly why in photos before we quote you a dollar.
CleanRun Duct Repair & Cleaning has documented the inside of ductwork in Rockville homes since 2013 – more than 52,000 residential duct cleaning jobs across the metro, every single one with a written price before work started and a photo record when the crew left. That’s not a marketing statement; it’s the operating standard we call the H.A.V.E.N. Standard, and it applies to every full system cleaning we schedule.
This page is a child of our broader Air Duct Cleaning in Rockville service – full system cleaning is the most thorough scope within that category, and it’s what we recommend when symptoms point to contamination throughout the entire air pathway, not just one or two runs.
To get a written price before committing to anything, call us at (240) 255-4519. A live person answers every call.
When You Need Full System Cleaning
A standard register cleaning handles surface-level debris. A full system cleaning is the right call when the problem runs deeper – into the air handler, through the plenum (the central distribution box your duct runs branch off from), and into return ducts that most single-visit cleanings never touch. Here are the specific situations where we see it come up most often in Rockville:
- Recent renovation or construction work. Drywall dust, insulation particles, and wood debris travel fast through an active HVAC system. In older Rockville neighborhoods like Twinbrook and Rockcrest, we regularly find construction debris packed into the first elbow of nearly every supply run after kitchen or basement remodels – even when the vents were covered during work.
- Persistent musty or stale odors when the system runs. If the smell clears when you turn the system off but returns within minutes of it cycling on, the source is inside the duct system or the air handler itself – not a surface you can reach with a household product.
- Documented mold presence or moisture events. Rockville sits at an elevation where summer humidity routinely pushes 75-85%, and homes built before 1990 in the Westmore and Hungerford areas often have ductwork that was never sealed properly. When moisture gets in and stays in, the interior of a flex duct or a metal elbow becomes a surface where biological growth takes hold quickly.
- Allergy or respiratory symptoms that worsen at home. If a household member’s symptoms are noticeably worse indoors than outdoors – and especially if those symptoms correlate with the furnace or air conditioning running – the air distribution system is the first place to document and inspect.
- No cleaning on record after five or more years of occupancy. NADCA’s published guideline recommends inspection every three to five years under normal use. A home that has never had a documented cleaning, or where the previous owners’ records are unavailable, is a candidate for a full system approach rather than a spot clean.
- Post-pest or rodent remediation. In Rockville’s older stock neighborhoods, we’ve pulled debris from duct runs that included nesting material, droppings, and dander distributed through fifteen or more supply runs. A full system cleaning after pest remediation is the only way to document that the pathway is clear.
Our Full System Cleaning Process
Every step below happens on every full system cleaning job in Rockville. Nothing is skipped based on job size or home age. The process follows the H.A.V.E.N. Standard, which means each phase is documented, not just described to you afterward.
- Pre-Work Camera Inspection and Written Scope. Before any equipment comes off the truck, a technician runs a camera through representative supply and return runs and photographs the air handler interior. The photos go into your job record. Then we put the written price in front of you – scope, line items, total – and no work starts until you sign off on it. This is Haven Standard Clause 1: written upfront pricing, no exceptions, no “we’ll see what we find.”
- Negative-Pressure Establishment. We connect a Nikro or Abatement Technologies collection unit to the main trunk line and create a negative-pressure environment throughout the duct system. Negative pressure means the interior of the duct system is operating below ambient air pressure – so when debris is dislodged, it moves toward the collection unit rather than back into your living space. We seal off registers in zones we’re not actively working so the airflow path is controlled.
- Mechanical Agitation of Every Duct Run. A Rotobrush rotary-brush system works through each supply and return run, dislodging debris that has compacted against duct walls, settled in low points, or adhered to flex duct liner. For rigid metal ductwork – common in Rockville split-levels and colonials built in the 1970s and 1980s – we adjust brush pressure and speed based on duct gauge and condition. Flex duct gets a different head profile to avoid liner damage.
- Air Handler and Plenum Cleaning. The plenum is where most of the system’s debris accumulates over time – it’s the central chamber that all supply runs feed from, and it collects whatever bypasses the filter. We clean the interior surfaces of both the supply and return plenums, wipe down the blower wheel if accessible, and document the evaporator coil housing condition. If the coil itself shows visible contamination, we note it in writing and photograph it – that’s a separate scope if addressed, priced separately before any work starts.
- Register Grille Cleaning and Reinstallation. Every register grille comes off, is cleaned with an antimicrobial-safe solution, dried, and reinstalled. We check the damper on each register for function – a stuck damper is a common cause of uneven room temperatures and often goes unreported by single-visit vacuum crews who never remove the grilles.
- Post-Work Camera Verification and Photo Record Delivery. After the system is reassembled and running, we run the camera again through the same runs documented in step one. The before-and-after photos go into a PDF job record that is delivered to you the same day, as a standard deliverable – not something you have to ask for. This is the documentation that distinguishes a real cleaning from vacuum noise.
Before
AfterFull System Cleaning Pricing in Rockville
Full system cleaning in Rockville typically runs between $349 and $749 for a single-system residential home. That range covers the camera inspection, negative-pressure extraction, mechanical agitation of all duct runs, air handler and plenum cleaning, register grille service, and the post-work photo record. Homes with two HVAC systems – common in larger properties in the Fallsgrove and King Farm sections of Rockville – are priced per system, and multi-system pricing is written out separately so you see exactly what each system costs before work starts.
Several factors move the number within that range:
- Duct count. A three-bedroom rancher with 10 supply registers prices differently than a four-level colonial with 22 registers and a dedicated return in every bedroom. We count every run before quoting.
- Duct material and condition. Flex duct in poor condition requires more care and slower brush speeds than rigid sheet metal, which adds technician time. Ductwork with existing damage or partial collapses – something we see fairly often in Rockville homes built in the 1960s that have never been inspected – is documented and priced separately before any repair work is discussed.
- Air handler accessibility. A standard utility-room air handler is straightforward. An attic-mounted system or a system installed behind a finished wall adds time; that time is in the written price, not discovered at the end of the job.
- Add-on scope items. Sanitizing treatments, dryer vent cleaning, or coil cleaning are priced as separate line items if you want them. They’re never bundled in without your awareness.
What we do not do: quote a $79 entry price on the phone and expand the scope at the door. The price you receive in writing before work starts is the price on the invoice when we leave. That’s Haven Standard Clause 1, and it has been the operating standard at CleanRun since the first job in 2013.
If you have a written estimate from another company, bring it. We’ll put our written number next to theirs, line by line, at no cost to you. That’s our Free Second Opinion offer, and it applies to any written estimate regardless of who wrote it.
Call (240) 255-4519 to schedule your written estimate. There’s no obligation – a live person answers and can usually get a technician to your Rockville address within a few days.
FAQs – Full System Cleaning
How is a full system cleaning different from a standard duct cleaning?
A full system cleaning addresses every component in the air duct cleaning pathway: supply ducts, return ducts, the plenum, air handler cabinet, blower housing, and every register grille. A standard or “basic” duct cleaning – the kind typically sold for $79 to $150 – usually means a technician vacuuming near the register openings with a shop-vac or light commercial vacuum. The difference matters because debris in the plenum or on the blower wheel continues circulating regardless of how clean the individual duct runs are. We photograph both scopes before and after so you can see what was and wasn’t addressed. If you’ve received a low-price quote and want a second set of eyes on the scope, call us at (240) 255-4519 and we’ll put a written comparison in front of you.
How long does a full system cleaning take in a typical Rockville home?
For a single-system home in Rockville with 10 to 18 registers – which covers most three- and four-bedroom homes in neighborhoods like Twinbrook, Fallsgrove, and Congressional Square – plan for three to five hours. Larger homes with two systems, extensive flex duct runs, or attic-mounted air handlers run longer. We give you a time estimate in writing alongside the price quote, so you can plan your day before the crew arrives. We don’t start a job we can’t finish in one visit.
Do I need to do anything to prepare my home before the cleaning?
Clear a path to your air handler and thermostat, and make sure each register in the home is accessible – furniture blocking a return register is the most common delay we run into in Rockville homes. You don’t need to cover furniture or leave the house, though some customers prefer to be in a different room during the mechanical agitation phase because the equipment is audible. We’ll tell you exactly what to expect during the pre-work walkthrough before anything starts.
Is the 365-Day Done Right Promise included with full system cleaning?
Yes. Every job CleanRun performs in Rockville – including full system cleaning – is covered by the 365-Day Done Right Promise. If the work isn’t right, we make it right, and that commitment is written on your job record, not stated verbally and forgotten. You receive the written documentation at the end of the same appointment. This is not a policy that requires manager approval or a specific complaint process; it’s a written standard that Tomas Reyes has held as a condition of every job since CleanRun was established.
What should I look for in the before-and-after photos I receive?
The camera captures the interior surface of each duct run from the register back toward the trunk line or plenum. In the “before” images, look for the color and texture of the duct wall: clean sheet metal is gray and smooth; contaminated ductwork shows visible debris layering, discoloration, or in some cases biological growth that appears as dark spotting. The “after” images should show the duct wall surface clearly, without the debris layer. If a before image shows contamination and the after image doesn’t show a clear improvement, that’s a conversation to have before the technician leaves – and our photo documentation process is specifically designed to make that conversation possible rather than avoidable.
What CleanRun Brings to a Full System Cleaning
Tomas Reyes built CleanRun around one operating principle: show the customer what’s there before asking them to decide anything. That means the camera goes in first, the written price comes second, and the crew starts only when both are in your hands. It’s the same sequence on job one as it was on job 52,000.
Equipment matters in this work. We use Nikro and Abatement Technologies negative-pressure extraction units because their filtration ratings contain the debris we’re pulling rather than redistributing it. Rotobrush agitation systems are calibrated per duct type, not set to a single speed and pushed through. Honeywell and Aprilaire filtration components are referenced when we discuss air handler findings – brands you can look up independently rather than taking our word for their performance specs.
Technicians are background-checked, uniformed, and identified by name before they arrive at your Rockville address. Haven Standard Clause 3 covers verified crews; it’s not something we mention as a selling point and then bypass on busy days.
Every full system cleaning also starts with or is connected to our broader home service standards – because a duct system doesn’t operate in isolation from the rest of the house, and we document findings in the air handler and plenum that affect the whole system, not just the runs we’re cleaning that day.
If you’ve read this far and you’re ready to get a written price for full system cleaning at your Rockville home, call (240) 255-4519. A live person answers. We’ll schedule a visit, put the written scope in front of you before any work starts, and leave you with a documented photo record of everything we did – or found – when we’re done.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Rockville, serving Rockville since 2013.