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 Severn
Air duct cleaning in Severn typically runs $350 – $650 for a whole-house residential system, with most jobs completed in a single visit. We dispatch crews from our Baltimore office and serve Severn homeowners with the same written pricing and 365-Day Done Right Promise that defines every Garrison Partners location. Call (361) 326-5060 for a free estimate.
We’ve worked in Severn long enough to know the ductwork here isn’t like what you’ll find in newer metro developments. The homes around Berrywood and Stillmeadows, the post-war ranches near Severna Park, the split-levels off Telegraph Road, they all carry decades of accumulated debris in systems that were patched together across multiple renovations. Our Air Duct Cleaning team shows up with rotary brush systems and negative-air machines because that’s what it takes to actually clean this housing stock, not just run a vacuum hose through it and call it done.
Why Hollis Air Duct Cleaning Is Severn’s Preferred Air Duct Cleaning Company
We’ve been in business since 2004, and our reputation in Severn is built on showing up when we said we would, pricing the job in writing before we touch anything, and leaving the site clean. The Garrison Standard doesn’t allow for moving targets.
Our technicians are background-checked and uniformed. You know who’s walking into your home before they arrive. And 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 morning to schedule something.
Every job gets the 365-Day Done Right Promise in writing. If the work fails within a year, we come back and make it right at no charge, including a free second visit. That’s not a satisfaction guarantee, that’s a specific commitment with specific terms.
We know Severn’s local conditions. The high humidity that promotes mold growth inside ductwork. The pollen surges from surrounding forests and wetlands that get drawn into HVAC systems every spring and fall. The construction dust from ongoing development near BWI Airport that infiltrates ductwork and settles in return plenums. This local knowledge changes how we approach the job, not just what we tell you about it.
Vent Cleaning in Severn
Vent Cleaning in Severn addresses the supply and return registers where conditioned air actually enters your rooms. In older Severn homes, these vents often show the first visible signs of trouble: dark staining around the grille, reduced airflow, or a musty smell when the system kicks on. A typical residential vent cleaning in Severn runs $150 – $300 as a standalone service, or it’s included in a full system cleaning.
Supply Vent Cleaning
Supply vents push heated or cooled air into your living spaces. In Severn’s 1980s and 1990s colonials, we often find these partially blocked by debris that settled where flex duct transitions to the boot. Our rotary brush system, built by Rotobrush, loosens this buildup so negative-air extraction can remove it completely.
Return Vent Deep Cleaning
Return vents draw air back to the handler for reconditioning. They’re the collection point for everything airborne in your home. In Severn’s humid climate, these vents can harbor mold on the grille and in the adjacent ductwork. We inspect with a camera before we clean, so you see what we’re dealing with, not just what we tell you.
Air Duct Repair in Severn
Air Duct Repair in Severn is often the necessary follow-up to cleaning, especially in homes with the mixed duct systems common here. When we open up a system and find crushed flex runs, separated fittings, or galvanized trunk lines corroded from decades of humidity exposure, cleaning alone won’t fix the underlying problem. Duct repair in Severn typically ranges from $200 – $500 for localized fixes like reconnection and sealing, up to $1,200 – $2,500 for more extensive replacement of damaged flex or corroded metal sections.
Flex Duct Reconnection and Sealing
The flex duct added during 1980s and 1990s renovations in neighborhoods like Berrywood and Stillmeadows was often fastened with zip ties or tape that’s degraded by now. We reconnect with proper mechanical fasteners and seal with mastic, not tape that’ll fail again in two years. This stops the bypass airflow that recirculates debris instead of moving it to the filter.
Galvanized Trunk Line Restoration
Original galvanized steel in Severn’s post-war homes can corrode internally from humidity, creating rough surfaces that trap debris and restrict airflow. We assess whether cleaning and internal sealing will restore performance, or if section replacement is the better long-term fix. Either way, the price is written down before we start.
Trusted Brands We Service in Severn
Our equipment roster includes Rotobrush rotary brush systems for mechanical agitation, Nikro negative-air machines for controlled debris extraction, and filtration products from Honeywell, Aprilaire, and Guardsman. We don’t use hardware-store gear. For Severn homeowners, this means we stock the parts and accessories that match your system, so we’re not ordering components and making you wait. The same tools commercial crews use on larger buildings, applied to your residential ductwork, with the same discipline: arrive inside the window, price in writing, complete the job by The Garrison Code, leave the site clean.
Common Air Duct Cleaning Problems We See in Severn Homes
- Debris traps at galvanized-to-flex transitions. Severn’s mix of post-WWII capes and 1980s – 2000s colonials means many systems combine galvanized trunk lines with flex duct added in later renovations. Debris accumulates at these transition fittings and at the air handler, problems that rarely show up in the metro’s newer, all-flex builds.
- Mold growth on duct interiors from year-round humidity. Severn’s humid subtropical climate keeps humidity high enough for mold to colonize galvanized interiors and flex liners. A basic vacuum-and-blow service won’t address this; it requires agitation, HEPA-contained extraction, and often antimicrobial treatment.
- Crushed or separated flex duct in additions. The flex duct installed during 1980s – 90s renovations in planned communities collapses or separates at fittings over time. Debris bypasses registers entirely and recirculates through the system, which explains why some rooms never seem to get clean air even after a standard cleaning.
- Dryer vents clogged with lint and sandy soil. Technicians in Severn often find dryer vents packed with lint mixed with debris from the area’s sandy soil, especially in neighborhoods near the Patapsco River where construction dust from ongoing development adds to the load. This creates a fire risk that standard duct cleaning often ignores.
Pricing for Air Duct Cleaning in Severn, MD
Whole-house residential air duct cleaning in Severn runs $350 – $650 for a typical single-family home, depending on system size, accessibility, and whether we find damage requiring repair. Commercial duct cleaning starts around $800 and scales with square footage and HVAC complexity. Vent cleaning as a standalone service is $150 – $300. Dryer vent cleaning, which we strongly recommend pairing with duct cleaning in Severn’s sandy-soil environment, runs $120 – $220.
What moves the price: the number of air handlers, whether ductwork is accessible through basement or requires attic/crawl space entry, the condition of existing flex duct, and whether we find separated or crushed runs that need repair before cleaning is effective. We inspect with a camera first, show you what we find, and write the price down before any work starts. One flat price per system. No per-vent pricing, no add-ons at the door. Call (361) 326-5060 for an exact quote, estimates are free.
We Also Serve Cities Near Severn
Our crews cover Severn and the surrounding communities: Odenton, Jessup, Gambrills, and Elkridge. Same written pricing, same 365-Day Done Right Promise, same background-checked uniformed technicians at every stop.
Serving Severn, MD - Our Local Coverage Area
We’re based in the Severn 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 Severn
The mixed duct systems common in Severn, combining original galvanized trunk lines with flex duct added during 1980s – 90s renovations, develop separation points and crushed runs that aren’t visible until cleaning begins. We camera-inspect before we quote, so you know whether repair is needed before we start, not after we’re halfway through.
Severn’s humid subtropical climate promotes mold growth on duct interiors and keeps debris sticky enough to resist basic vacuum extraction. Our process uses mechanical agitation with rotary brushes and negative-air HEPA containment to remove material that humidity has bonded to duct walls. Call (361) 326-5060 if you smell mustiness when your system runs.
Yes, and we recommend it especially in Severn, where sandy soil and construction dust from BWI-area development combine with lint to create dense blockages. Dryer vent cleaning runs $120 – $220 and is often the most impactful single service for home safety.
We use Rotobrush rotary brush systems, Nikro negative-air machines, and filtration from Honeywell, Aprilaire, and Guardsman. These are professional-grade tools, not consumer equipment, and we explain what each does while we’re working so you understand the process.
We inspect flex duct with a camera to locate collapses, separations, and debris traps at transition fittings. Where we find damage, we reconnect with mechanical fasteners and seal with mastic, then verify airflow balance before we finish. The goal is a system that moves air properly, not just one that looks clean from the register.
In Berrywood, our tech pulled a blower motor on a 1990s colonial and found the return plenum packed with construction dust and pollen drawn in from nearby development. A camera inspection showed a crushed flex run feeding the primary bedroom, so we set up negative pressure with HEPA filtration, used agitation tools to loosen the caked debris, and then sealed and reconnected the run. The homeowner’s complaint of uneven airflow upstairs was gone after the clean and repair.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Severn since 2004.