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 Annapolis
Air duct cleaning in Annapolis typically runs $350 – $650 for a full residential system, and most jobs are scheduled within a few days of your call. If you live downtown near Cornhill Street or in a Broadneck peninsula ranch off Cape St. Claire Road, the condition of your ducts has as much to do with bay humidity and crawlspace moisture as with ordinary household dust.
We’re Hollis Air Duct Cleaning, part of the Garrison Partners family, and we’ve been sending crews to Annapolis since 2004. Scheduling and dispatch run through our Baltimore office, but the technicians who arrive at your door live and work this region. They know the difference between a 1980s Annapolis Roads split-level with flex duct in a vented attic and an 1840s colonial on Duke of Gloucester Street where the returns run through a 14-inch crawlspace that floods in spring tides. That local knowledge changes what equipment we bring, how we set up negative pressure, and whether we recommend a video inspection before we touch anything.
Our phone is answered by a live person 24 hours a day, 7 days a week. Call (361) 326-5060 to schedule a free estimate, or read on for honest pricing ranges and what makes Annapolis ductwork different from anywhere else in Maryland.
Why Hollis Air Duct Cleaning Is Annapolis’s Preferred Air Duct Cleaning Company
Annapolis homeowners call us back because we show up inside the window, price the job in writing before we start, and leave the site clean. That’s The Garrison Standard, and it’s how every Hollis location operates, including ours serving Annapolis.
Our technicians are background-checked and uniformed. You know who’s walking into your home before they arrive. We use professional-grade equipment, Rotobrush rotary brush systems and Nikro negative-air machines, paired with filtration products from Honeywell, Aprilaire, and Abatement Technologies. These are the same tools commercial crews use on hospital and school systems, not hardware-store attachments pushed through a shop vac.
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. No negotiation, no runaround.
Roy Castellanos, who leads Hollis Air Duct Cleaning, built this operation on the principle that a written price and a written guarantee beat a low teaser quote every time. Annapolis customers have learned that the hard way from other outfits.
Ductwork Cleaning in Annapolis
Ductwork Cleaning in Annapolis is not a generic dust-removal job. Because of the city’s coastal location on the Chesapeake Bay, ducts in unconditioned crawlspaces and attics see condensation, mildew, and musty microbial growth far more than systems in drier inland markets. In the Historic District, duct runs are crammed into 12 – 20 inch crawlspaces only a few feet above tidewater-influenced soil, so our techs routinely find rust-flaked galvanized returns and mildew blooms at low-lying registers. That’s a plumbing-and-water-table problem as much as an HVAC one, and it changes how we approach the work.
A typical residential Ductwork Cleaning in Annapolis runs $350 – $550 for a standard ranch or colonial with one furnace and up to 15 supply registers. Historic District homes with multiple retrofitted zones, galvanized runs, and crawlspace moisture issues often fall in the $500 – $650 range because of the additional time needed for source removal and HEPA containment.
Negative-Air Source Removal
We attach a Nikro negative-air machine to your trunk line and seal each register. This creates suction throughout the system while we agitate debris with a Rotobrush rotary whip. In Annapolis crawlspaces, we run the whip slowly. Rust flakes and mildew-laced dust are heavier than ordinary lint, and without controlled negative pressure, they’ll resettle downstream.
Post-Cleaning Verification
After agitation and vacuuming, we verify airflow at each register and check static pressure at the air handler. In bay-humid conditions, we also inspect for standing water or condensation stains that would restart microbial growth within weeks. If we find it, we tell you before we pack up.
Air Duct Inspection in Annapolis
Air Duct Inspection in Annapolis should happen before any cleaning in homes built before 1950, and we strongly recommend it for any property with retrofitted flex duct or shared building systems. A camera inspection reveals crushed runs behind plaster walls, disconnected boots in crawlspaces, and rust perforation in galvanized returns. All three are common in Annapolis’s Historic District and in mid-century ranches on the Broadneck peninsula where crawlspace moisture has gone unchecked.
A standalone Air Duct Inspection in Annapolis costs $150 – $250. We apply this fee toward your cleaning if you proceed within 30 days. For downtown condos and rowhouses with shared dryer stacks, the inspection also maps which units share which runs, something many owners don’t know until lint backs up through a neighbor’s vent.
Video Documentation
We record the full inspection and show you the footage. In a recent job off State Circle, our camera found a flex duct boot completely detached inside a lathe-and-plaster wall. The homeowner had been paying to heat a dead space for three winters. No amount of cleaning would have fixed that.
Shared System Mapping
For Annapolis condos and multi-unit buildings, we diagram the duct and dryer vent topology. Shared stacks in downtown rowhouses often serve four to six units, and the lint trap at your unit is only a fraction of what accumulates in the common line. We mark access points and note where code-compliant cleanouts should be installed.
Trusted Brands We Service in Annapolis
We stock parts and filtration products from Honeywell, Aprilaire, Abatement Technologies, and Guardsman for Annapolis customers, which means faster turnaround when your system needs more than cleaning. If your ductwork inspection reveals a failing media filter cabinet or a rusted return boot, we can often replace it same visit rather than scheduling a return trip. Our Rotobrush and Nikro equipment is maintained to manufacturer spec, and our technicians train on each platform annually. We don’t show up with gear we can’t explain or service we can’t stand behind.
Common Air Duct Cleaning Problems We See in Annapolis Homes
- Mildew and microbial growth in low-lying returns. In downtown Annapolis, returns near the crawlspace floor draw in damp, musty air all summer. Standard whip-and-vac cleaning without negative pressure just dislodges the spores and blows them back out the supply registers two days later.
- Rust-flaked galvanized ductwork in Historic District crawlspaces. The combination of bay humidity and tidewater-influenced soil corrodes metal returns from the outside in. We find perforations that leak conditioned air into the crawlspace and pull musty air back into the living space.
- Crushed or disconnected flex duct behind plaster walls. Retrofitted flex duct in 18th- and 19th-century homes was often pulled through openings too small, then buried behind original plaster with no access panel. Our camera finds these before we waste time cleaning a dead line.
- Lint backup in shared dryer stacks downtown. Annapolis rowhouses and condos often route dryer vents through a common stack. One unit’s neglected lint load can back into a neighbor’s run, and the rooftop termination is rarely accessible from individual units. We clean the full stack from end to end.
Pricing for Air Duct Cleaning in Annapolis, MD
Here’s what air duct cleaning costs in the Annapolis market, based on the jobs we’ve priced in writing this year:
| Service | Typical Range |
|---|---|
| Standard residential full system (1 furnace, up to 15 supplies) | $350 – $550 |
| Historic District / large home with moisture remediation needs | $500 – $650 |
| Standalone video inspection | $150 – $250 |
| Dryer vent cleaning (single unit, accessible termination) | $125 – $200 |
| Shared stack dryer vent cleaning (multi-unit) | $300 – $500 |
What moves you within these ranges: register count, number of air handlers, crawlspace accessibility, whether we need to set up containment for active mildew, and if the job requires access through a neighbor’s unit or restricted parking. We give you one flat price per system, agreed in writing, before any work starts. No per-vent add-ons. No price that jumps when the technician walks through your door. That’s how we’ve operated since 2004.
Call (361) 326-5060 for an exact quote. Estimates are free, and we’ll tell you if an inspection makes sense before a full cleaning.
We Also Serve Cities Near Annapolis
Our crews regularly work in Annapolis and the surrounding communities: Riva, Crownsville, Arnold, and Edgewater. If you’re in Cape St. Claire, Hillsmere Shores, or off Riva Road near the South River, you’re in our service area. Scheduling runs through our Baltimore office, and we route crews to minimize your wait.
Serving Annapolis, MD - Our Local Coverage Area
We’re based in the Annapolis 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 Annapolis
Because the mustiness is coming from your crawlspace, not your ducts. In downtown Annapolis, low-lying returns sit 12 – 20 inches above tidewater-influenced soil, and bay humidity keeps that soil damp year-round. If the previous cleaner didn’t establish negative pressure on the return side, or if they skipped the crawlspace boots entirely, the mildew source never left. We inspect the full return path, seal and treat active growth, and verify with a post-cleaning camera run. Call (361) 326-5060 if you’re still smelling basement after a recent cleaning.
Yes, and we clean the full stack, not just your unit’s connection. We were called to a 1790s Federal-era home on Cornhill Street where the second-floor registers were puffing out a musty, basement smell all summer. Our tech ran a Rotobrush whip through the original retrofit flex duct in the low crawlspace and pulled out rust-flaked galvanized chips, mildew-laced dust, and enough old plaster dust to clog the HEPA vac twice. After source removal and a camera inspection, the homeowner said the upstairs finally smelled like the rest of the house. For shared dryer stacks, we map the full line and clean from the rooftop termination or the lowest access point, whichever gets complete coverage.
We coordinate with your building management for loading zone access or schedule around off-peak hours. Our Nikro negative-air machines and Rotobrush systems are on wheeled carts, but the vacuum unit needs to be within 25 feet of your main trunk for proper suction. For restricted-access buildings off West Street or in the City Dock area, we sometimes stage on the street and run hoses through a ground-floor utility room. We figure this out during your estimate walkthrough, not on the day of service.
Broadneck ranches from the 1970s – 1990s typically have standard galvanized or flex duct in vented attics and crawlspaces. The work is straightforward: negative-air setup, rotary brush agitation, register-by-register cleaning. Downtown colonials have retrofitted ductwork snaked through 18th-century framing, often with no access panels, mixed materials, and moisture corrosion from the crawlspace. We almost always camera-inspect first, and we budget extra time for careful boot-by-boot work without damaging original plaster. The price reflects that difference.
Yes. Our Air Duct Cleaning crews follow NADCA ACR guidelines for source removal, containment, and post-cleaning verification. That means sealed registers during agitation, negative pressure maintained throughout, and HEPA filtration on the vacuum exhaust. We don’t blow compressed air through a register and call it clean. The standard matters more in Annapolis than in drier markets because bay humidity means any remaining organic debris will regrow within weeks.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Annapolis since 2004.