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 Baltimore
Air duct cleaning in Baltimore typically runs $350 – $650 for a full residential system and $800 – $2,500 for commercial buildings, with most jobs completed in a single visit. Our crews dispatch from the brand’s Baltimore office and serve rowhouses from Hampden to Federal Hill, townhomes in Canton, and commercial buildings downtown. We know the parking restrictions on narrow blocks, the shared-wall duct systems that date to the 1800s, and the coal-dust legacy that still shows up in floor registers across the city. Call (361) 326-5060 for a written estimate before any work starts.
Why Hollis Air Duct Cleaning Is Baltimore’s Preferred Air Duct Cleaning Company
We’ve been part of the Garrison Partners family since 2004, and our Baltimore operation runs on The Garrison Standard: arrive inside the quoted window, price in writing, complete the job by the book, and leave the site clean. That standard matters more here than in most cities because Baltimore’s housing stock doesn’t forgive sloppy work.
Our technicians are background-checked and uniformed. You know who’s walking into your home before they arrive. 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 for a scheduling question.
Every job carries our 365-Day Done Right Promise in writing. If the work fails within a year, we return and make it right at no charge, including a free second visit. That’s not a verbal assurance; it’s printed on every invoice.
We understand Baltimore’s specific challenges: shared-wall duct leakage in rowhouses, restricted alley access for equipment, and the humid subtropical climate that pushes mold and dust through aging galvanized systems. Our Air Duct Cleaning team trains specifically on these conditions.
Residential Air Duct Cleaning in Baltimore
Residential Air Duct Cleaning in Baltimore addresses a housing stock unlike anywhere else in the country. Most of our residential calls come from rowhouse neighborhoods where original galvanized steel ducts run through shared walls and unheated crawlspaces, often pulling in basement air, coal dust residue, and pest debris from neighboring units. A typical full-system residential cleaning in Baltimore runs $350 – $650, with video inspection and register sealing included. Homes with extensive cross-contamination issues or multiple HVAC zones may run higher.
We don’t quote per-vent pricing. One flat price per system, agreed before work starts. No teaser rates that balloon once the technician is inside.
Rowhouse Duct Sealing and Cross-Contamination Control
Baltimore’s 19th-century rowhouse corridors share wall cavities and original galvanized duct runs between units, so duct cleaning here frequently doubles as cross-contamination control. Sealing shared-wall leaks that let a neighbor’s basement coal dust, cooking odors, or pest debris migrate through the system is standard on our residential jobs. This shared-duct morphology is rare outside Baltimore’s rowhouse belts, making the city a distinct market where cleaning addresses both efficiency and unit-to-unit air isolation.
Video Inspection and Before-and-After Documentation
We run a camera through the full system before touching anything. You see what we see: gaps at register boots, debris compaction in horizontal runs, moisture staining from summer condensation. After cleaning, we run the camera again. The photos are yours. No guesswork about whether the work was actually done.
Commercial Air Duct Cleaning in Baltimore
Commercial Air Duct Cleaning in Baltimore covers office buildings downtown, medical facilities near Johns Hopkins, retail spaces in Harbor East, and multi-unit residential properties in Fells Point and Mount Vernon. Commercial systems in Baltimore face the same humidity challenges as residential, but at scale: summer condensation in rooftop units, winter heating cycles pushing particulates through multi-floor distribution, and the compliance requirements that come with occupied commercial space. Typical commercial duct cleaning in Baltimore runs $800 – $2,500 depending on system size, access difficulty, and whether video documentation is required for insurance or regulatory purposes.
We schedule around your operations. Evening and weekend slots available. Written price before work starts, same as every Hollis job.
Multi-Unit Residential and HOA Coordination
Baltimore’s condo conversions and historic apartment buildings often have centralized systems serving multiple units. We coordinate with property managers and HOAs to isolate zones, protect occupied spaces with HEPA containment, and document completion for board records. One point of contact, one written price, one invoice.
Post-Construction and Renovation Cleaning
Commercial renovations in Baltimore’s historic buildings kick up plaster dust, lead paint debris, and century-old particulates that standard HVAC filters won’t catch. We clean the full distribution system after construction completion, with negative-air containment to protect finished spaces. Required on many commercial occupancy permits in the city.
Trusted Brands We Service in Baltimore
Our equipment roster includes Rotobrush rotary brush systems for agitation cleaning, Nikro negative-air machines for source removal, and filtration products from Honeywell and Aprilaire. These are the same tools commercial crews use, not hardware-store gear. We stock common replacement components locally for Baltimore customers, so if a register boot needs replacement or a filter housing is damaged during inspection, we can often complete the repair same visit rather than ordering parts and rescheduling. For buildings with specialized containment requirements, we also deploy Abatement Technologies HEPA filtration and containment systems.
Common Air Duct Cleaning Problems We See in Baltimore Homes
- Shared-wall duct leaks in rowhouses. Original galvanized ducts in Baltimore’s attached homes often have gaps at wall penetrations and floor registers that pull air from basements and neighboring units. Cleaning without sealing these penetrations just re-pollutes the system on the next heating cycle.
- Coal dust legacy at floor registers. In neighborhoods like Hampden and Federal Hill, gaps at register boots suck in coal dust residue from old basements, a remnant of the city’s coal-heating past that standard filters won’t address.
- Humidity-driven mold and condensation. Baltimore’s humid subtropical climate causes ducts to sweat in summer, especially in unconditioned crawlspaces. Winter heating cycles then push musty air and spores through the system.
- Restricted equipment access. Narrow streets and alley parking in dense neighborhoods like Federal Hill force long hose runs from the truck, which can drop negative pressure below effective source-removal levels if crews don’t compensate with larger-capacity Nikro machines.
Pricing for Air Duct Cleaning in Baltimore, MD
Here’s what air duct cleaning costs in Baltimore’s market:
- Full residential system cleaning: $350 – $650
- Residential with extensive register sealing or cross-contamination repair: $500 – $900
- Small commercial (up to 5,000 sq ft): $800 – $1,400
- Medium commercial (5,000 – 15,000 sq ft): $1,200 – $2,200
- Large commercial or multi-zone residential: $1,800 – $2,500+
- Video inspection add-on: included on most jobs; standalone $150 – $250
What moves the price: system size, number of zones, access difficulty (rowhouse crawlspaces take longer than basement utilities), and whether register sealing or duct repair is needed. We inspect first, write the price down, and get your approval before starting. No per-vent pricing. No coupons that triple at the door. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Baltimore
Our crews work throughout the Baltimore metro, including Baltimore proper and nearby Catonsville, Rosedale, Dundalk, and Parkville. Same written pricing, same 365-Day Done Right Promise, same live-answer scheduling in every service area.
Serving Baltimore, MD - Our Local Coverage Area
We’re based in the Baltimore 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 Baltimore
Shared-wall duct leaks are the cause. Original galvanized ducts in Baltimore rowhouses often have gaps at floor registers and wall penetrations that pull air from basements and neighboring cavities. We seal these penetrations during cleaning, which stops the odor migration. Call (361) 326-5060 to schedule a camera inspection.
We use higher-capacity Nikro negative-air machines to maintain adequate suction over longer hose runs, and we stage equipment in alleys or adjacent lots when possible. Our Baltimore crews carry portable HEPA vacuums for tight-access supplemental cleaning. The method changes; the standard doesn’t.
Humidity alone doesn’t change the schedule, but it changes what we find. Baltimore’s muggy summers cause condensation in uninsulated ducts, which can accelerate mold growth and debris compaction. We recommend inspection every 3 – 5 years, sooner if you notice musty odors or reduced airflow. Call (361) 326-5060 for a free assessment.
Yes, and it’s often necessary. Stacked dryer vents in shared chases mean one unit’s lint pathway can back up into a neighbor’s run. Cleaning only the visible lint trap misses the bulk of the fire load in the shared stack. We clean the full stack from roof to basement with rotary tools and verify airflow at each connection.
Written price before work starts, scheduled around your operations, HEPA containment for occupied spaces, and video documentation on request. Most commercial jobs in Baltimore complete in one visit; larger systems may require zone-by-zone scheduling. The 365-Day Done Right Promise applies to commercial work exactly as written.
In Hampden, a homeowner on a narrow rowhouse block called about a musty smell coming from the floor registers every time the air handler kicked on. Our tech ran a camera inspection and found the original galvanized supply and return ducts had gaps at the floor registers pulling coal dust and damp basement air from the shared wall cavity. We set up negative pressure with HEPA filtration, used agitation tools to break up the compacted debris, and sealed the register boots and wall penetrations. The supply and return ducts now move air without the cross-unit odor, and the homeowner reported the musty smell was gone on the next heating cycle.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Baltimore and the surrounding communities.