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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Sealing Across Audubon
If your upstairs bedrooms never reach the temperature you set, or your energy bills keep climbing despite a newer HVAC system, you probably have leaky ductwork. In Audubon, where homes run heating and cooling hard through humid summers and freezing winters, duct sealing often pays for itself within a single season. We’re Hollis Air Duct Cleaning, and our crews work Audubon regularly, dispatching from our Philadelphia office to handle everything from 1960s ranch homes off Egypt Road to newer townhomes near the Route 422 corridor. Call us at (361) 326-5060 for a free written estimate.
Why Hollis Air Duct Cleaning Is Audubon’s Preferred Duct Sealing Company
We’ve been sealing ducts in Montgomery County since 2004, and Audubon sits right in the middle of our regular service rotation. Our technicians know the difference between the original sheet-metal ductwork in those east-side ranch homes and the flex-duct systems in newer developments near the Audubon Business Center. That matters because each type leaks differently, and sealing them properly takes different materials and techniques.
Our customers in Audubon come back to us because we show up inside the quoted window, price the job in writing before we touch anything, and leave the site clean. The Garrison Standard requires it, and our 365-Day Done Right Promise backs it in writing. If our seal fails within a year, we return and make it right at no charge, including a free second visit.
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 to schedule.
Every technician is background-checked and uniformed. You know who’s walking into your home before they arrive.
Air Duct Sealing in Audubon
Air Duct Sealing in Audubon means finding and closing the gaps, seams, and disconnected joints in your home’s ductwork so the air you pay to heat or cool actually reaches the rooms it’s supposed to. Most Audubon homeowners call us after noticing hot or cold spots, dust blowing from registers, or utility bills that spike without explanation. In this market, a typical whole-home duct sealing job runs $1,200 – $2,800 depending on system size, duct material, and accessibility.
How We Test Before We Seal
We pressurize your duct system and measure leakage with a calibrated fan and digital manometer. This gives us a hard number in CFM25, cubic feet per minute of leakage at 25 pascals of pressure. You’ll see the before number, we’ll show you the problem spots with a camera, and you’ll see the after number when we’re done. No guesswork, no selling you on work you don’t need.
Materials That Hold Up in Local Conditions
Southeastern Pennsylvania’s humidity swings demand mastic and foil tape rated for expansion and contraction. We use professional-grade sealing compounds, not hardware-store duct tape, because the cheap stuff fails within a season here. Our equipment roster includes Nikro negative-air machines and Rotobrush rotary systems for the cleaning that often precedes sealing.
Duct Sealing Services in Audubon
Duct Sealing Services in Audubon cover everything from spot repairs on disconnected flex duct to full-system mastic sealing on original galvanized steel. We also handle duct modification when undersized returns or poorly designed trunk lines are forcing your HVAC system to work harder than it should. For most Audubon homes, our whole-system sealing runs $1,200 – $2,800, with smaller spot repairs starting around $400 – $700.
Newer Homes Near Route 422
The townhomes and single-family builds from the 1990s through 2010s were constructed tight for energy efficiency, but that same tight construction means drywall dust and construction debris often got pulled into the ductwork during finishing. We’ve found that sealing these systems sometimes requires cleaning first, then sealing, because mastic won’t bond properly to dusty metal. Our Air Duct Cleaning in Audubon handles that prep work.
Older Ranch Homes on the East Side
Original sheet-metal ducts in these homes were sized for gravity furnaces or early forced-air systems. The metal is thin, the seams are unsealed, and decades of thermal cycling have loosened joints. Our technicians work carefully to avoid damaging this vintage material while achieving modern airtightness standards. Homeowners are often shocked by how much conditioned air was leaking into their basements or crawl spaces.
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 Audubon
We carry professional-grade equipment and materials from Rotobrush, Nikro, Abatement Technologies, Guardsman, Honeywell, and Aprilaire. For Audubon customers, this means we don’t special-order basic parts and make you wait a week. Our vans stock mastic, foil tape, mechanical fasteners, and replacement flex duct in common diameters. If your system needs filtration upgrades after sealing, we install Aprilaire and Honeywell media filters sized to your returns. The same tools commercial crews use, explained in plain terms on every job.
Common Duct Sealing Problems We See in Audubon Homes
- Disconnected flex duct in newer townhomes. The flex duct installed in 1990s and 2000s Audubon developments can sag and pull loose at connection boots, especially in attics that see temperature swings. We find entire rooms getting no airflow because a 10-foot section has separated completely.
- Leaky return plenums in split-levels. Many Audubon split-levels draw return air through wall cavities or basement pukas that were never properly sealed. Your HVAC system ends up pulling basement air, musty crawl space air, or even combustion gases into your living space.
- Failed tape on original galvanized ducts. The cloth-backed tape used on 1960s and 1970s Audubon ranch homes has dried and crumbled. What’s left is bare metal seams leaking 15 – 30% of conditioned air before it reaches your vents.
- Oversized or poorly supported trunk lines. In some Audubon colonials, the main trunk was sized for a larger system or installed without adequate hangers. The sagging creates low points where air stalls and pressure drops, making rooms at the end of the run uncomfortable year-round.
Pricing for Duct Sealing in Audubon, PA
Whole-home duct sealing in Audubon typically runs $1,200 – $2,800. Spot repairs on disconnected sections or single leaky returns start at $400 – $700. What moves you within that range: the total linear feet of ductwork, whether we need to access attic or crawl space runs, the condition of existing material (clean metal seals better than corroded metal), and whether your system needs cleaning before sealing can be effective.
We give you one flat price per system, agreed in writing before any work starts. No per-vent pricing, no teaser coupon that balloons once the van is in your driveway. You’ll see before-and-after photos of your own ducts, and you’ll get the pressure-test numbers in writing. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Audubon
Our crews cover the full Montgomery County area, including Audubon and nearby Kulpsville, Lansdale, Harleysville, and Collegeville. Same standards, same written pricing, same 365-Day Done Right Promise. If you’re in one of these neighboring towns and found this page, the pricing and process are identical. We also handle Dryer Vent Cleaning in Audubon and surrounding areas.
Serving Audubon, PA - Our Local Coverage Area
We’re based in the Audubon 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 Audubon
Most whole-home duct sealing jobs in Audubon run $1,200 – $2,800, with smaller spot repairs at $400 – $700. The exact price depends on your system’s size, material, and accessibility. Call (361) 326-5060 for a free written estimate with no obligation.
Cheap quotes usually mean per-vent pricing that excludes your main trunk line, or tape-only repairs that won’t last through a Pennsylvania winter. We seal the full system, use mastic rated for local humidity swings, and guarantee the work for 365 days. If a quote seems too low, ask whether it includes pressure testing and a written guarantee.
We pressure-test your system before and after sealing, measured in CFM25, and show you the numbers in writing. You’ll also see before-and-after photos from inside your ducts. The Garrison Standard requires documentation on every job, not just a handshake and a promise.
Properly sealed ductwork should last 10 – 15 years or more, unless your home shifts on its foundation or a rodent damages the material. In Audubon’s older ranch homes with original galvanized duct, we sometimes recommend monitoring every 3 – 5 years because the metal itself can deteriorate. Call us at (361) 326-5060 if your energy bills start climbing again.
We don’t treat duct sealing as an emergency service, but our phones are answered by a live person 24/7, and we schedule Audubon appointments as quickly as our route allows. If a disconnected duct is causing immediate comfort or air quality issues, we’ll prioritize getting a technician to your home. Call (361) 326-5060 to discuss timing.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Audubon and Montgomery County since 2004.