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.
Air Duct Cleaning Company in Havre de Grace, MD
Most homeowners in Havre de Grace pay between $380 and $620 for a complete residential air duct cleaning, with whole-home dryer vent runs adding $140 to $220 and full duct sealing ranging from $1,200 to $2,800 depending on system size and accessibility. Hollis Air Duct Cleaning handles all three jobs in Havre de Grace using Rotobrush rotary systems and Nikro negative-air machines, with every price written down before we start. Crews are dispatched from our Baltimore office and serve Havre de Grace directly. Call (361) 326-5060 for a free estimate.
What makes this town different from Bel Air or Aberdeen is right there in the geography. Havre de Grace sits where the Susquehanna River empties into the Chesapeake Bay, and that water on three sides pushes indoor humidity higher than nearly anywhere else in Harford County. We’ve cleaned ducts in homes here where the supply registers were growing visible mold while the homeowner’s dehumidifier ran nonstop. The housing stock doesn’t help: narrow brick rowhouses and Victorians downtown, mid-century ranches on the outskirts, many with original galvanized ductwork that’s rusting from the inside out. We know what to look for because we’ve worked in both.
Why Havre de Grace Homes Are Different
The humid subtropical climate here isn’t abstract. It means summers that top 90 degrees with dew points in the 70s, and winters where the bay keeps air damp enough that condensation forms inside ductwork running through unconditioned crawl spaces. In Havre de Grace, indoor humidity regularly stays above 60% year-round. That’s the threshold where dust mites thrive and mold spores colonize sheet metal.
The housing stock compounds it. Much of the city was built between the 1880s and 1950s. Downtown you’ll find brick rowhouses on Union Avenue and Washington Street with duct retrofits that snake through walls never designed for them. Out toward Route 155, ranches from the 1960s and 70s often have original galvanized trunk lines that have corroded at the seams. After Tropical Storm Lee in 2011, we saw basements and crawl spaces in the 100-year floodplain that took weeks to dry; the ductwork in those homes still shows accelerated rust compared to drier inland properties just 20 miles west.
Then there’s the tidal factor. After heavy rain, even without visible flooding, the Susquehanna’s tidal influence can push moisture into crawl spaces near the waterfront. Our technicians know to check for water intrusion in homes near Concord Point, the yacht basin, and the riverfront blocks south of Revolution Street. It’s a specific check we don’t routinely perform in Aberdeen or Bel Air.
Our Main Havre de Grace Services
Most calls we get from Havre de Grace fall into three categories. Each has its own page with full pricing, process details, and neighborhood-specific notes.
Air Duct Cleaning in Havre de Grace
We clean the full supply and return system with a Rotobrush rotary brush and HEPA vacuum, followed by a Nikro negative-air machine to pull dislodged debris out of the home entirely. In Havre de Grace, we pay special attention to rusted galvanized lines and any flex duct that has sagged in damp crawl spaces. We also inspect for mold staining on the interior of trunk lines, common in waterfront properties with chronically high humidity. Air Duct Cleaning in Havre de Grace covers full pricing and what to expect on the day of service.

Dryer Vent Cleaning in Havre de Grace
Dryer vent runs in older Havre de Grace homes often exceed 25 feet with multiple elbows, especially in rowhouses where the laundry area sits mid-building. Lint accumulates at each turn, and the humid air here keeps it packed tight. We use rotary brushes and high-velocity air tools to clear the full run from dryer to termination, then verify airflow with a meter. Dryer Vent Cleaning in Havre de Grace has full details on pricing and the fire-safety inspection we include.

Duct Sealing in Havre de Grace
Leaky ductwork in Havre de Grace loses conditioned air into humid attics and crawl spaces, which also draws outside moisture into the system. We seal accessible joints and seams with mastic and mesh, then pressure-test the system to verify results. In homes with original sheet metal, we often find separations at the elbows and rust holes that require patching before sealing. Duct Sealing in Havre de Grace explains how we price by system size and accessibility.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Havre de Grace
We stock parts and filters from Honeywell, Aprilaire, and Guardsman for common Havre de Grace systems, and carry Abatement Technologies HEPA filtration upgrades for homeowners dealing with persistent moisture issues. Most filter replacements and minor hardware orders arrive within two business days. See our brands for the full list.
Pricing for Air Duct Cleaning Company in Havre de Grace, MD
| Service | Typical range in Havre de Grace |
|---|---|
| Whole-home air duct cleaning (single system) | $380 – $620 |
| Whole-home air duct cleaning (dual system) | $580 – $920 |
| Dryer vent cleaning (standard run, one story) | $140 – $220 |
| Dryer vent cleaning (extended run, two+ stories) | $220 – $340 |
| Duct sealing (small home, single system) | $1,200 – $1,800 |
| Duct sealing (medium home, single system) | $1,800 – $2,400 |
| Duct sealing (large home or dual system) | $2,400 – $2,800 |
| Mold remediation prep (antimicrobial treatment) | $180 – $340 |
| Register and grille deep cleaning (per unit) | $25 – $45 |
| Main trunk line access cut and patch | $120 – $200 |
Prices in Havre de Grace run toward the higher end of our regional range when crawl spaces are flooded or inaccessible, when original galvanized duct requires extra handling, or when homes in the historic district need careful work around plaster and lath. We write the full price down before touching anything, and that number does not move once we’re inside.
Neighborhoods We Serve in Havre de Grace
We work across the city and into the surrounding unincorporated areas. Crews typically schedule Havre de Grace appointments with arrival windows that account for Route 40 traffic patterns and the narrower streets in the historic core.
- Historic Downtown / Concord Point
- Union Avenue corridor
- Bayou Heights
- Grace Harbour
- Route 155 corridor and surrounding developments
Service Area – Cities Near Havre de Grace
Our Baltimore office dispatches crews throughout northeastern Harford County and into southern Cecil County. We regularly schedule alongside Havre de Grace in Aberdeen, MD, Abingdon, MD, Bel Air, MD, and Edgewood, FL. If you’re unsure whether your address falls inside our service radius, call (361) 326-5060 and we’ll confirm directly.
Serving Havre de Grace, MD - Our Local Coverage Area
We’re based in the Havre de Grace 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 Company in Havre de Grace
No permit is required for standard air duct cleaning or dryer vent cleaning in Havre de Grace. Duct sealing that involves modifying or extending the HVAC system may require a permit from the city; we handle the paperwork when it applies and include any fees in the written price. Call (361) 326-5060 if you’re unsure whether your job qualifies.
We typically schedule Havre de Grace appointments within three to five business days, with some flexibility for urgent situations like post-flooding inspections or dryer vent blockages. Our Baltimore dispatch coordinates arrival windows to avoid Route 40 peak congestion. Call (361) 326-5060 for next available openings.
Yes. We work in homes throughout the 100-year floodplain, including properties near the Susquehanna River and the yacht basin. Our technicians are trained to check for water intrusion in crawl spaces and basement duct runs, and we document any moisture damage we find with before-and-after photos for your records. Call (361) 326-5060 to schedule.
What happens when you call
- 1A real person answersNo phone trees - talk to a local air duct cleaning pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Havre de Grace Customers Say
"Duct sealing along with the cleaning cut our summer bill. Straight talk and fair price."
- Gwen O."Sealed some leaking duct joints in the crawl space with mastic. Rooms that were always cold now get air."
- Ronald W."Dryer vent was packed with lint and took two hours to dry a load. Cleaned it out from the roof cap down. One cycle again."
- Paula Q.




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