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.
Fast, Reliable Duct Sealing Across Oberlin
Oberlin’s mix of tight, efficient homes and aging duct infrastructure creates a specific kind of pressure loss problem. We’re the Duct Sealing team that handles it. Our crews dispatch from the Cleveland office and roll regularly to Lorain County, so an Oberlin homeowner calling (361) 326-5060 typically sees us inside a reasonable window without the wait you’d get from a shop based two counties away.
We’ve worked the grid streets around Tappan Square, the post-war ranches off East Lorain Street, and the converted multi-units near Oberlin College. That matters because a 1905 Victorian with original square metal trunks and a 1972 split-level with flex duct need completely different sealing approaches. We don’t guess. We inspect, write the price, and seal it by the book.
Why Hollis Air Duct Cleaning Is Oberlin’s Preferred Duct Sealing Company
Our reputation in Oberlin was built on showing up inside the window and leaving the site clean. That’s The Garrison Standard, and it’s how every Hollis crew operates. We’ve returned to homes near West College Street and Professor Street to make things right under the 365-Day Done Right Promise, not because we had to negotiate, but because we promised it in writing.
Response time to Oberlin is straightforward. We’re not routing trucks from Columbus or Toledo. Our Cleveland coordination means we’re already in Lorain County for other jobs, so adding an Oberlin stop doesn’t involve a two-hour highway haul. For homeowners who’ve already had one no-show from a distant contractor, that operational fact matters more than any slogan.
Local knowledge shows up in small ways. We know which downtown blocks still have the original coal-conversion trunks with hand-seamed joints that open up every heating season. We know the 1970s splits near Plum Creek Park tend to have attic flex duct that’s cooked brittle from summer humidity. And we know that Oberlin’s green-building homeowners, the ones who’ve added ERVs and tightened their envelopes, need sealing that accounts for the new static pressure their upgraded systems create. That’s not generic duct work. That’s Oberlin work.
Air Duct Sealing in Oberlin
Air Duct Sealing in Oberlin addresses the conditioned air that leaks out of your ductwork before it ever reaches your rooms. In a town where many homeowners have invested in heat pumps, ERVs, and tighter building envelopes, losing 20-30% of heated or cooled air through gaps and seams is a direct hit on both efficiency and indoor air quality. Our process starts with a pressure test to locate leaks, followed by mechanical sealing with mastic and specialized tape, then a post-seal verification to confirm the improvement.
A typical whole-system sealing job in Oberlin runs $800 – $1,800 depending on accessibility, duct material, and the extent of leakage found. Smaller partial repairs, such as sealing a single trunk line or addressing a known disconnected run, can start around $350. We write the exact price before touching anything, and it doesn’t move at the door.
Pressure Testing and Leak Detection
We pressurize your duct system and measure airflow loss at the air handler. This gives us a hard number, not a guess, and lets us show you exactly where your money is going. In Oberlin’s older homes near Tappan Square, we regularly find leakage rates above 25% at original hand-seamed metal joints.
Mastic Application and Mechanical Sealing
We use water-based duct mastic rated for the temperature swings of Northeast Ohio heating systems, applied with reinforcement mesh at stress points. For flex duct runs, we add mechanical supports so the seal doesn’t fail when the blower cycles on and off. It’s the difference between a patch and a repair that lasts.
Duct Sealing Services in Oberlin
Duct Sealing Services in Oberlin cover everything from spot repairs on disconnected runs to full-system sealing for homes that have never had their ductwork properly tested. Our crews arrive with Rotobrush inspection cameras and pressure testing equipment, so we can show you the condition of your ducts before we quote anything. The work itself ranges from accessible basement trunk lines to crawl space and attic runs that require careful navigation around knob-and-tube remnants and modernized insulation.
Most Oberlin homeowners who call us for sealing have already noticed the symptoms: rooms that won’t hold temperature, dust streaks near vent registers, or utility bills that climbed after a heating system upgrade. In the Victorian and Craftsman homes around downtown, we also see the gray soot pattern left by decades of coal-conversion furnaces, where particulate has worked into seams and now blows through every time the blower cycles.
Whole-System Sealing for Efficiency Retrofits
Oberlin’s green-building culture means many homeowners have tightened their homes and upgraded equipment without addressing the ductwork. That creates high static pressure and forced leakage. We seal to the new system’s specifications, not the old one’s, so your investment in efficiency actually pays off.

Emergency Disconnect and Reconnection Repairs
Sometimes a duct run has fully separated, often in attic spaces where summer humidity has degraded tape or where critters have disturbed runs near the college arboretum. We reconnect, support, and seal these with permanent materials, not the foil tape that fails in two seasons.

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.
Trusted Brands We Service in Oberlin
Our trucks carry sealing and filtration products from Aprilaire, Abatement Technologies, and Guardsman, the same lines commercial crews spec for hospitals and schools. For Oberlin homeowners, that means no waiting on special orders when we find a compatibility issue with your existing filtration setup. We stock mastic, reinforcement mesh, and mechanical fasteners sized for everything from original square metal trunks to modern spiral duct. If your system includes a Honeywell or Aprilaire air cleaner, we verify that our sealing work maintains the airflow rates those units require. The right material in the van saves you a return trip and a second day of disrupted schedule.
Common Duct Sealing Problems We See in Oberlin Homes
- Original coal-conversion trunks with failing seams. Downtown Oberlin’s late-1800s homes often have square metal ductwork that was never designed for forced air. The hand-seamed joints open under pressure, especially after a long heating season, and they leak conditioned air into wall cavities and basements.
- Brittle flex duct in attic spaces. The 1970s splits and ranches ringing Oberlin frequently have flex duct that has degraded from summer attic heat and winter cold. The outer jacket cracks, the inner liner tears at bends, and the insulation becomes a sponge for condensation.
- Disconnected returns pulling unconditioned air. In multi-unit conversions near Oberlin College, we’ve found return ducts that were never properly connected during renovation, so the system pulls air from crawl spaces and wall cavities instead of from living spaces. That drives up heating costs and introduces moisture and mold spores.
- ERV and heat pump retrofits overwhelming old seals. Oberlin’s efficiency-minded homeowners have upgraded equipment without resizing or sealing ductwork. The higher static pressure of modern systems forces air through gaps that were marginal with the old furnace and now gape under the new load.
Pricing for Duct Sealing in Oberlin, OH
Whole-system duct sealing in Oberlin typically runs $800 – $1,800. Partial repairs and spot sealing start around $350 and cap near $600 for most single-trunk or register-bank jobs. What moves the number: how much of the system is accessible without demolition, whether we’re working with original metal that needs mechanical reinforcement or modern flex that needs replacement sections, and the square footage the ductwork serves.
We don’t quote per-vent or per-linear-foot teaser prices that balloon once we’re inside. We inspect, test, and write one flat price for the system. That price covers all materials, labor, and the post-seal verification test. If you also need Air Duct Cleaning in Oberlin or Dryer Vent Cleaning in Oberlin, we can bundle and price those together, still in writing, still before work starts.
Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Oberlin
Our crews work throughout Lorain County and neighboring communities. If you’re in Oberlin proper, Amherst, Wellington, Elyria, or Grafton, the same Cleveland-coordinated dispatch applies. Same written pricing, same 365-Day Done Right Promise, same background-checked, uniformed technicians. We don’t shrink our standard because the drive is longer.
Serving Oberlin, OH - Our Local Coverage Area
We’re based in the Oberlin 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 Duct Sealing in Oberlin
Whole-system duct sealing in Oberlin runs the same $800 – $1,800 we quote in Elyria, Amherst, and Wellington. Travel from our Cleveland coordination point doesn’t change the price. Call (361) 326-5060 for a free estimate on your specific system.
Yes. We seal ducts in the historic downtown grid around Tappan Square, the post-war ranches off East Lorain, the multi-units near campus, and the newer builds toward Plum Creek Park. Every neighborhood gets the same written price and same crew standard.
We typically schedule Oberlin appointments within a few business days, sometimes sooner if we’re already in Lorain County. We’re not same-day emergency responders, but we’re also not routing from two hours away. Call (361) 326-5060 to check current availability.
We handle urgent disconnections and system failures as quickly as scheduling allows, with phones answered live 24/7 to coordinate. True emergencies, such as a disconnected return pulling crawl space air during heating season, get prioritized. Call (361) 326-5060 and we’ll sort out the timeline.
Every duct sealing job is covered by our 365-Day Done Right Promise. If the seal fails, the mastic cracks, or the repair doesn’t hold within one year, we return and make it right at no charge, including a free second visit. It’s in writing on every invoice, not a verbal maybe.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Oberlin and Lorain County under The Garrison Standard since 2004.




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