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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AfterFast, Reliable Air Duct Cleaning Across Ellicott City
Air duct cleaning in Ellicott City runs $350 – $650 for a typical residential system, with post-flood remediation for Historic Main Street properties starting closer to $800 due to sediment depth and contamination testing. We’re the local crew that knows the difference between routine dust removal and Patapsco River silt decontamination, and we price it in writing before any hose gets uncoiled. Dispatch and scheduling are coordinated from our Washington, DC office, but our trucks roll to Ellicott City daily, and we know the valley roads well enough to hit our arrival windows.
We’ve cleaned ducts in the stone rowhouses along Upper Main Street, the split-levels off Route 40 near Centennial Park, and the colonials tucked into the hillsides above the Patapsco. Each neighborhood presents a different duct problem. That matters because a crew that treats every job the same will miss the flood silt ring in a Historic District register or crush a fragile branch run in a 1970s trunk system. Our technicians are background-checked, uniformed, and trained to spot what Ellicott City’s specific housing stock and river-valley climate do to ductwork. Call (361) 326-5060 for a free estimate.
Why Hollis Air Duct Cleaning Is Ellicott City’s Preferred Air Duct Cleaning Company
We’ve been part of the Garrison Partners family since 2004, and our standard hasn’t changed: arrive inside the quoted window, price the job in writing, complete it by the book, leave the site clean. That’s The Garrison Standard, and it applies to every Ellicott City job we take.
Our phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday to schedule. When you call (361) 326-5060, you speak to someone who can book your appointment and confirm your arrival window on the spot.
Every job carries the 365-Day Done Right Promise. If the work fails within a year, we return and make it right at no charge, including a free second visit. We put that in writing before we start, not after.
Our technicians arrive in uniform, with photo ID, driving marked vehicles. You know who is walking into your home before they arrive. That’s The Garrison Code, and it’s non-negotiable for every Hollis crew member.
Air Duct Cleaning Services in Ellicott City
Air Duct Cleaning Services in Ellicott City cover the full removal of accumulated debris from supply ducts, return ducts, trunk lines, and the air handler, using either rotary brush agitation or negative-air source removal depending on the system’s condition and contamination type. A typical residential cleaning in Ellicott City runs $350 – $550 for a standard suburban home with intact ductwork; homes in the Historic District with flood sediment or mold contamination typically range $600 – $950 due to extended remediation time and HEPA containment requirements. We perform a video inspection first, so you see what we see before we quote.
Residential Duct Cleaning
Our residential work focuses on the complete supply-and-return system, including all registers, boots, and the air handler cabinet. In Ellicott City’s 1970s-90s split-levels and colonials, we frequently find disconnected branch runs behind finished basement walls that have been blowing conditioned air into wall cavities for years. The rotary brush system from Rotobrush breaks loose adhered debris, while our Nikro negative-air machine maintains suction so nothing escapes into your living space.
Commercial Duct Cleaning
Commercial systems in Ellicott City’s converted mill buildings and mixed-use structures along Main Street require containment protocols that residential crews often skip. We seal work zones with Abatement Technologies HEPA filtration, document before-and-after conditions with video, and provide written certification for property managers and insurance carriers.
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.
HVAC Duct Cleaning in Ellicott City
HVAC Duct Cleaning in Ellicott City addresses the entire forced-air system, not just the visible registers, because the blower motor, evaporator coil, and plenum collect the same debris that lines your duct walls. A full system cleaning for a typical Ellicott City suburban home runs $450 – $650; if we find mold or flood contamination requiring coil treatment and antimicrobial application, the range extends to $750 – $1,100. We always inspect first and quote in writing.
Video Inspection and Documentation
We feed a camera through your trunk lines and branch runs before any cleaning begins. In Ellicott City, this step is essential. We’ve found crushed ducts, standing water in low-lying boots, and the horizontal silt lines that mark Patapsco flood intrusion. You watch the feed with our technician, and we save the recording for your records.
Duct Sealing and Repair
Cleaning reveals problems that cleaning alone won’t fix. Disconnected joints, crushed flex runs, and deteriorated mastic seals waste energy and recontaminate air after we’ve left. We repair what we find, priced separately and approved by you before we start. Sealing with mastic and mechanical fasteners typically adds $200 – $400 to a standard cleaning.
Trusted Brands We Service in Ellicott City
Our equipment roster includes Rotobrush rotary brush systems for agitation cleaning, Nikro negative-air machines for source removal, and HEPA filtration from Abatement Technologies. For homes requiring upgraded filtration after remediation, we stock and install Honeywell, Aprilaire, and Guardsman products. We keep common filter sizes and replacement parts on our Ellicott City trucks, so most upgrades happen same visit without a return trip.
Common Air Duct Cleaning Problems We See in Ellicott City Homes
- Flood silt rings in Historic District duct boots. The 2016 and 2018 Patapsco floods left a visible sediment line inside floor registers and duct boots along Main Street. Standard vacuuming doesn’t remove this compacted river debris, and the mold spores embedded in it recolonize within weeks.
- Disconnected branch runs in hillside split-levels. The original sheet-metal trunk-and-branch systems installed in Ellicott City’s 1970s-90s homes often separate at joints behind finished walls. Homeowners feel weak airflow in certain rooms but assume it’s normal; camera inspection finds the real problem.
- Persistent dampness in low-lying valley homes. Ellicott City’s position in the Patapsco River valley creates a humidity pocket that keeps ductwork moist longer after storms than ridgeline properties. Mold and mildew establish colonies in these conditions even when the rest of the system looks clean.
- Crushed flex runs from renovation work. Previous owners or contractors in Ellicott City’s older homes often crimped or crushed duct runs while finishing basements or adding additions. The restriction reduces airflow and creates turbulent zones where debris accumulates.
Pricing for Air Duct Cleaning in Ellicott City, MD
We don’t quote per-vent teaser prices that balloon once the van is in your driveway. We give one flat price per system, agreed in writing before work starts.
| Service | Typical Range in Ellicott City |
|---|---|
| Standard residential duct cleaning (intact system, no contamination) | $350 – $550 |
| Full HVAC duct cleaning with blower and coil | $450 – $650 |
| Post-flood remediation with HEPA containment (Historic District) | $600 – $950 |
| Mold/mildew treatment with antimicrobial application | $750 – $1,100 |
| Duct sealing and minor repairs (priced after inspection) | $200 – $400 |
| Video inspection and documentation | Included with cleaning |
Factors that affect your specific price: system size and accessibility, contamination type and depth, whether flood sediment or mold is present, and any repairs or sealing needed. We inspect first, show you the video, and write the price down. It does not move at the door. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Ellicott City
Our crews work throughout Howard County and into neighboring communities. We regularly clean ducts in Ellicott City, Columbia, Fulton, Savage, and Jessup. Each area has its own housing stock and climate conditions, and we adjust our approach accordingly. Call (361) 326-5060 to schedule service in any of these locations.
Serving Ellicott City, MD - Our Local Coverage Area
We’re based in the Ellicott City area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Air Duct Cleaning in Ellicott City
Look for a horizontal silt line inside your floor registers or duct boots, a musty odor that intensifies when the heat runs, or visible staining on register fins. These indicate Patapsco River sediment from the 2016 or 2018 floods, not ordinary household dust. Standard cleaning leaves this material behind, and mold spores embedded in it will recolonize. Call (361) 326-5060 and we’ll run a camera inspection to confirm what you’re dealing with.
No. The hillside split-levels and colonials typically have 1970s-90s sheet-metal trunk-and-branch systems that fail at disconnected joints and crushed branch runs, not flood sediment. Their problem is airflow loss and decades of accumulated debris, not river-borne contamination. Camera inspection reveals which issue you have. Call (361) 326-5060 to schedule.
Ellicott City sits in the Patapsco River valley, which channels humid summer air and traps moisture against low-lying properties. After storms, valley-floor ducts retain humidity days longer than ridgeline systems, creating conditions where mold and mildew thrive even in otherwise clean ductwork. We address this with thorough drying protocols and, when needed, upgraded filtration. Call (361) 326-5060 for an assessment of your specific situation.
We use Rotobrush rotary brush systems for agitation, Nikro negative-air machines for source removal, and Abatement Technologies HEPA filtration for containment. For post-remediation upgrades, we install Honeywell, Aprilaire, and Guardsman filtration products. All equipment is professional-grade, maintained to manufacturer specifications, and operated by trained technicians. Call (361) 326-5060 for details on what applies to your job.
Every three to five years for standard suburban homes with no special conditions. Homes in the Historic District that experienced 2016 or 2018 flooding should be inspected annually for silt accumulation and mold growth. Properties in the valley humidity pocket may also need more frequent assessment. We provide free inspections to help you set the right schedule. Call (361) 326-5060 to book yours.
Ready to see what’s inside your ducts? Our Air Duct Cleaning team serves Ellicott City with written prices, background-checked technicians, and the 365-Day Done Right Promise. Call (361) 326-5060 for a free estimate. We’ll show you the video, explain what we found, and give you a flat price before any work begins.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Ellicott City and the greater Howard County area.