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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Before
AfterTrusted Air Quality & Sanitizing for Rockville Homeowners
Rockville Air Quality & Sanitizing typically addresses three problems: microbial growth inside ductwork, persistent odors that survive standard cleaning, and airborne particles that trigger respiratory symptoms. CleanRun Duct Repair & Cleaning has performed this work in Rockville since 2013, with every job starting from a written price and ending with a documented photo record of every treated duct run. Call (240) 255-4519 for a free estimate with no obligation.
Rockville’s climate doesn’t help. Summers here run humid from June through September, and that moisture collects in ductwork where the temperature differential between attic runs and conditioned air creates condensation points. We’ve photographed active mold growth in plenums - the central distribution box where all duct runs connect - in homes off Rockville Pike, in the Twinbrook corridor, and in newer construction near King Farm where tight building envelopes trap humidity. The issue isn’t always visible at the register. That’s why our process starts with a camera inspection, not a sales pitch.
Our crews are background-checked and uniformed, operating under Haven Standard Clause 3: Verified Crews. Tomas Reyes established CleanRun in 2013 on the principle that a customer should see what we see before deciding what to do about it. We’ve now served over 52,000 homes, every one with a written price before work started and a photo record when the crew left. The 365-Day Done Right Promise applies to air quality and sanitizing work exactly as it does to every other service we offer: if it’s not right, we make it right, in writing, not subject to manager approval.
What Our Air Quality & Sanitizing Service Includes
Mold Treatment
Mold treatment targets fungal growth inside the HVAC system, typically in the plenum, evaporator coil housing, or at low points in duct runs where condensation pools. You need this service when you see visible growth at registers, smell a persistent musty odor when the system cycles, or when a camera inspection reveals colonization inside metal or flex ductwork. CleanRun Air Duct Cleaning Rockville applies an EPA-registered antimicrobial treatment after mechanical removal of visible growth, with every treated surface photographed before and after. We do not paint over mold or treat it with consumer-grade sprays that leave residue on coils. The photo record shows exactly which runs were treated and what they looked like afterward.
Bacteria Sanitizing
Bacteria sanitizing addresses microbial contamination that doesn’t present as visible mold but produces odors or aggravates respiratory conditions, particularly after water intrusion or prolonged system inactivity. You need this service when your home has experienced a leak near the air handler, when a vacation home’s system has been shut down for months, or when occupants experience unexplained respiratory symptoms that improve away from the house. CleanRun uses professional-grade application equipment from Nikro to distribute sanitizing agents as a fine mist that reaches the full surface area of duct interiors, not just the line-of-sight portions accessible from registers. The process is documented with before-and-after photos of representative duct runs, included in your job record.
Odor Removal
Odor removal eliminates persistent smells that survive standard duct cleaning, including pet urine that has permeated flex duct, smoke residue from kitchen fires or tobacco use, and the sour smell of bacterial growth in drain pans. You need this service when standard cleaning has removed debris but the smell returns within days, or when the odor source is embedded in porous duct liner rather than loose particulate. CleanRun Air Duct Cleaning Rockville identifies the specific odor source through camera inspection and targeted testing rather than masking smells with deodorizers. Our treatment protocol matches the chemistry of the odor source: oxidation for organic compounds, enzymatic breakdown for biological material, or thermal fogging for deeply embedded smoke particles. The photo record shows the source location and the treated area.
UV Light Installation
UV light installation places germicidal ultraviolet lamps in the air handler or ductwork to inhibit microbial growth on coils and in the airstream. You need this service when your system shows recurrent mold or bacterial growth despite cleaning, when coil maintenance costs are escalating due to biofilm buildup, or when occupants have immunocompromised conditions that warrant continuous air treatment. CleanRun installs Honeywell and Aprilaire UV systems sized to the specific CFM - cubic feet per minute - of your air handler, with lamps positioned for maximum exposure time without impeding airflow. We photograph the installation location, document the lamp model and replacement schedule, and include the 365-Day Done Right Promise on wiring and mounting integrity. Lamp replacement reminders are provided as part of ongoing service.
Air Purifier Install
Air purifier installation adds whole-house filtration or active purification downstream of the air handler, treating all conditioned air rather than relying on portable units in individual rooms. You need this service when portable purifiers aren’t covering your square footage, when occupancy has increased (new baby, home office conversion, multigenerational living), or when outdoor air quality events - wildfire smoke, pollen surges, construction dust - regularly overwhelm standard filtration. CleanRun Air Duct Cleaning Rockville installs Honeywell and Aprilaire whole-house systems, including media filters with MERV 13+ ratings and electronic air cleaners, with duct modifications photographed before and after. The written scope specifies the pressure drop impact on your system and any required blower adjustments. We do not install equipment that exceeds your system’s rated static pressure.
Allergen Reduction
Allergen reduction combines mechanical filtration, duct sealing, and source removal to lower concentrations of pollen, dust mite debris, pet dander, and other particulate triggers in circulated air. You need this service when occupants experience seasonal or year-round allergic symptoms indoors, when standard cleaning hasn’t reduced visible dust accumulation, or when a new allergy diagnosis requires environmental control. CleanRun performs particle count testing before and after treatment using calibrated optical meters, with results included in your job record. The protocol typically includes negative-pressure extraction of ductwork, register and boot cleaning, filter upgrade recommendations, and duct sealing to prevent attic or crawl space infiltration. Photos document the condition of each duct run and the sealant application points.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Brands We Service for Air Quality & Sanitizing
We’ve installed and serviced hundreds of Honeywell whole-house air purifiers and UV systems in Rockville and surrounding Montgomery County homes. Their F100 and F300 electronic air cleaners require specific duct transitions to maintain rated airflow, and we stock the replacement cells and pre-filters that most Rockville hardware stores don’t carry. Our crews have also serviced Aprilaire media air cleaners and steam humidifiers since 2013, including the 2210 and 2410 models common in homes built during the 2015-2020 construction wave in the King Farm and Fallsgrove neighborhoods. We photograph the existing installation, note any ductwork modifications needed for compatibility, and provide the written price before removing any panels.
Abatement Technologies negative-air machines and Nikro portable HEPA systems are part of our equipment roster for containment and source control during mold remediation work. Whether you have Honeywell, Aprilaire, or any other make of air quality equipment - or you’re starting from a system with no purification component at all - we can assess your ductwork, measure your static pressure, and recommend a solution that fits your HVAC capacity. Every recommendation comes with a written price and a documented photo record of the existing conditions we based it on.
Before
AfterSigns You Need Air Quality & Sanitizing Right Now
- Musty or sour odors when the HVAC cycles. This indicates active microbial growth somewhere in the system, typically the evaporator coil, drain pan, or a low point in ductwork where condensation collects. The smell is the volatile organic compounds released by fungal or bacterial metabolism; by the time you smell it, the colony is established and spreading spores through every register.
- Visible growth or discoloration at registers or in the return air grille. What you can see at the register is usually the trailing edge of a larger problem upstream. We’ve photographed mold extending 15 feet back from register openings in Rockville homes, particularly in flex duct with porous liner that provides both a food source and a moisture reservoir.
- Respiratory symptoms that improve when you leave the house. If coughing, congestion, or headaches ease within hours of being away and return within hours of coming home, your HVAC system is likely circulating a biological or particulate trigger. This pattern is common in Rockville’s older split-levels near Twinbrook and in newer tight-construction homes where ventilation rates are below ASHRAE guidelines.
- Recurrent coil icing or reduced airflow after cleaning. Biofilm - a slimy bacterial layer - on evaporator coils insulates the fins and restricts airflow more effectively than dust alone. If your coil has been cleaned but icing returns within a season, the underlying microbial colonization needs targeted treatment, not just another rinse.
- Recent water intrusion or leak near the air handler. Even a small leak that was “cleaned up” can leave enough moisture in duct liner or insulation to support mold growth. We’ve found active colonization in ductwork six months after a resolved condensate pump failure, with homeowners unaware because the growth was in a basement run with no visible register access.
Our Air Quality & Sanitizing Process - Step by Step
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Camera inspection and contamination mapping. We feed a borescope camera through every accessible duct run, starting at the plenum and working to each register. The video feed is displayed in real time, and we mark the location and extent of any mold, bacterial slime, or odor-embedded debris. In Rockville homes with finished basements, we identify which runs are accessible through existing registers and which may require limited access panel cuts - noted in the written scope with repair pricing if needed.
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Written price delivered before any work starts. Haven Standard Clause 1 requires a written, itemized price for every component of the proposed work before a single panel comes off. This includes the treatment protocol, any required access repairs, equipment installation labor and materials, and the documented photo record deliverable. There is no “call for a quote” in our process; the price is written and in your hands before you decide.
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Mechanical source removal and containment. For mold or heavy biological contamination, we establish negative-pressure containment using Abatement Technologies HEPA-filtered extraction equipment. This prevents cross-contamination of clean duct runs during the removal process. We photograph the containment setup, the condition of each run before treatment, and the mechanical removal process where accessible.
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Targeted treatment application. The specific treatment - antimicrobial for mold, sanitizer for bacteria, oxidation or enzymatic for odors, installation for UV or filtration - is applied according to manufacturer specifications and EPA registration requirements. UV lamps are positioned for maximum dwell time without creating ozone above safe levels. Air purifier installations include pressure-drop testing to confirm your blower can handle the added resistance.
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Post-treatment verification and photo record delivery. We re-inspect treated areas with the borescope camera, perform particle count or odor testing where applicable, and compile the before-and-after photo record for every duct run. This documented record is delivered as a standard job deliverable, not an extra charge. The 365-Day Done Right Promise is activated in writing before we leave.
How Much Does Air Quality & Sanitizing Cost in Rockville?
A typical mold treatment for a single-family home in Rockville runs $1,200-$2,800 depending on the number of affected duct runs, whether the plenum requires treatment, and if any access panels need to be cut and repaired. See our Air Quality & Sanitizing pricing for more details. Bacteria sanitizing for a whole system typically falls in the $800-$1,600 range. UV light installation with a properly sized Honeywell or Aprilaire unit runs $600-$1,400 including electrical connection and mounting. Whole-house air purifier installation ranges from $900-$2,200 depending on the filtration grade and any required duct modifications. Odor removal is priced by source complexity, with most Rockville jobs between $700-$1,900.
Several factors move these ranges. Homes with finished basements and limited access to ductwork require more labor for equivalent coverage. The age of your system matters: older ductwork with degraded liner may need repair or replacement before treatment is viable, which we identify during the camera inspection and include in the written scope. Square footage alone is a poor predictor; we’ve treated 1,200-square-foot homes with complex duct layouts that cost more than 3,000-square-foot homes with straight trunk-and-branch designs.
The most common way Rockville homeowners overpay is accepting a low initial quote that excludes necessary components. A $79 duct cleaning coupon doesn’t include camera inspection, doesn’t treat microbial growth, and doesn’t provide a photo record. By the time the technician is in your home, the price has quadrupled or the work is superficial. CleanRun’s written price includes everything required to do the job correctly; there is no per-vent upcharge, no mandatory “disinfectant” add-on revealed after arrival, and no photo record held behind a fee. Our free estimate puts the full scope and price in writing before you commit.
Every estimate includes: camera inspection of all accessible runs, written scope of recommended treatment, itemized pricing, before-and-after photo record of all treated areas, and activation of the 365-Day Done Right Promise. If you have a competitor’s written estimate, we provide a free second opinion under Haven Standard Clause 5, with our number written next to theirs for direct comparison.
Air Quality & Sanitizing Near Rockville - Our Service Area
CleanRun serves Rockville and the surrounding Montgomery County corridor, with regular work in Air Quality & Sanitizing in Gaithersburg, Air Quality & Sanitizing in Bethesda, and throughout Silver Spring, McLean, Reston, Washington, Sterling, Arlington, Herndon, Ashburn, and Fairfax. Most Rockville appointments are scheduled within a week of contact, with emergency response available for active water intrusion or confirmed mold growth affecting immunocompromised occupants. Crews dispatched to the Rockville area carry the full equipment roster: Rotobrush mechanical cleaning systems, Nikro HEPA extractors and application equipment, Abatement Technologies negative-air machines, and Honeywell and Aprilaire UV and filtration components. Call (240) 255-4519 to schedule or to request a free second opinion on any written estimate you’ve already received.
Serving Rockville, MD - Our Local Coverage Area
We’re based in the Rockville area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions - Air Quality & Sanitizing in Rockville
Air Quality & Sanitizing in Bethesda targets biological contamination and airborne particles that standard duct cleaning doesn’t address. While standard cleaning removes loose debris and dust through negative-pressure extraction, sanitizing applies EPA-registered treatments to kill or inhibit mold, bacteria, and viruses on duct surfaces, and air quality installation adds filtration or UV purification to continuously treat circulated air. CleanRun performs camera inspection before recommending which level of service your system actually needs, and we provide the photo record to show you what we found. Call (240) 255-4519 for a free estimate - we’ll inspect first and recommend second.
Most residential jobs in Rockville are completed in four to eight hours, depending on system size, contamination extent, and whether installation work is included. Mold treatment with containment setup takes longer than bacteria sanitizing; UV or air purifier installation adds two to three hours for electrical connection and testing. We provide a time estimate in the written scope before work starts, and we don’t leave until the photo record is complete and the 365-Day Done Right Promise is activated in writing.
Whole-system bacteria sanitizing typically runs $800-$1,600, mold treatment $1,200-$2,800, UV installation $600-$1,400, and whole-house air purifier installation $900-$2,200 in the Rockville market. The exact price depends on your ductwork accessibility, system size, and the specific contamination or equipment involved. CleanRun provides a written, itemized price before any work starts under Haven Standard Clause 1, with no per-vent add-ons or post-arrival upsells. Call (240) 255-4519 for a free estimate with exact pricing for your home.
Yes. We’ve installed and serviced Honeywell and Aprilaire UV systems, electronic air cleaners, and media filters since 2013, and we stock replacement components that aren’t always available at retail. Our crews are trained on the specific electrical and ductwork requirements of each manufacturer’s product line, and we verify compatibility with your existing HVAC capacity before recommending installation. Every installation is photographed, pressure-tested where applicable, and covered by the 365-Day Done Right Promise.
We prioritize calls involving active water intrusion, visible mold growth affecting occupied spaces, or situations where immunocompromised residents are at risk. All calls are answered by a live person, 24/7, and we schedule emergency inspections as quickly as crew availability allows. For non-emergency concerns, we typically schedule within a week and always provide the written price before any work begins. Call (240) 255-4519 to discuss your situation and we’ll tell you honestly whether it warrants emergency response or scheduled service.
Every job is backed by the 365-Day Done Right Promise: if the work is not right, CleanRun makes it right, in writing, not subject to manager approval or discretionary policy. For UV and air purifier installations, this covers wiring integrity, mounting security, and system performance for one full year. For sanitizing treatments, it covers re-treatment if the original contamination returns within 365 days due to incomplete application or missed source locations identified in our photo record. The guarantee is a written deliverable, not a verbal assurance.
Clear a three-foot area around your air handler and at least one register in each room so our crew can move equipment and access duct openings. If you have pets, secure them in a separate area during the treatment application period. You don’t need to leave the house, though we recommend avoiding treated spaces for the manufacturer’s specified dwell time, typically two to four hours. We’ll tell you exactly what to expect, show you the photo record of what we found, and deliver the written price before any treatment begins. Call (240) 255-4519 to schedule at your convenience.
Schedule Your Air Quality & Sanitizing Service in Rockville Today
Call (240) 255-4519 to speak with a live person about your air quality concerns. We’ll schedule a free inspection, deliver a written price before any work starts, and leave you with a documented photo record of every treated duct run backed by the 365-Day Done Right Promise. No coupons, no per-vent games, no surprises. Just the work your home actually needs, priced honestly and performed accountably.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Rockville since 2013.