Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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.
Aprilaire Duct Sealing & Repair: The Dallas Owner’s Guide
We stock and install Aprilaire-compatible duct sealing, collar replacements, and takeoff repairs across Dallas, with most jobs running between $220 and $480 installed depending on how much of the duct system has pulled away from the plenum or trunk line. Most Dallas homeowners discover the problem the hard way: a room that never cools in August, a dusty film on furniture near a ceiling register, or a utility bill that climbed 30% over one summer. The Aprilaire name on your air handler doesn’t fail often, but the flexible duct connectors and mastic seals around it do, and Dallas heat accelerates every material breakdown in the system.
Which Aprilaire Models This Applies To
This applies to whole-home Aprilaire ventilation and filtration systems commonly installed in Dallas houses: the 800 and 700 series steam and fan-powered humidifiers, the 5000 and 4000 series electronic air cleaners, and any Aprilaire media cabinet paired with a central furnace or heat pump. The duct sealing work itself usually involves the round flexible duct, the metal takeoff collar where it meets the supply plenum, and the mastic or foil tape joints that have dried and cracked over years of Texas attic heat. Finding your model is straightforward: the data plate on the Aprilaire unit’s chassis lists the model and serial, and the duct collar measurements stamped on the takeoff tell us the exact diameter we need to match, typically 6, 8, or 10 inches in Dallas homes. Aprilaire doesn’t sell proprietary duct connectors as a locked in product line, so OEM Aprilaire-branded collars and boots are rare; we install quality aftermarket sheet metal and UL-rated flex that matches or exceeds what the original install used, and we tell you upfront which is which on the written quote. Linden Air Duct Dallas is an independent service provider and not affiliated with Aprilaire, but we work with their equipment every week and know how their cabinet dimensions interface with standard duct sizes.
Styles & brands we work with
Signs Your Aprilaire Duct Sealing & Repair Is Failing
- One room that never reaches setpoint. A separated duct connector or unsealed takeoff dumps conditioned air into the attic instead of the room. In older Dallas ranch homes near Lake Highlands, we regularly find flex duct that’s been drooping off the plenum for years, heating the attic while the bedroom stays stuck at 78 degrees.
- Dust accumulation on furniture near a specific register. When the return side loses its seal, the system pulls attic air, insulation fibers, and dust through gaps and blows it into living spaces. Aprilaire filtration can’t catch what never passes through the filter.
- Attic smells in the house. A breached return duct pulls hot, stale attic air directly into your conditioned air stream. You’ll notice it most when the AC first kicks on in the afternoon.
- Whistling or hissing near the air handler. That’s air escaping under pressure through a cracked mastic seal or a loose collar. It’s not a noise your system should make, and it’s not one that fixes itself.
- Ice on the indoor coil or short cycling. Airflow loss from leaking ductwork drops static pressure across the coil, and in Dallas humidity that becomes ice. The compressor then shuts off early because it can’t shed heat, and the whole cycle repeats.
Replacement Cost & What’s Included
In Dallas, a single duct connector or takeoff repair with new collar, mastic seal, and insulation typically runs $220 to $340. Re-sealing multiple takeoffs at the plenum or repairing a section of collapsed flex duct lands between $360 and $480. The range depends on two things: how many joints have actually failed and whether we’re working in a walkable attic or a tight crawlspace. Every quote includes the part, the labor, the mastic and UL-rated tape, and cleanup, written as one flat price before any work starts. We don’t charge per vent, and we don’t discover surprise line items once the van is parked in your driveway. Every repair carries a 365-day written guarantee: if the seal fails inside a year, we come back at no charge and make it right. That’s what the 365-Day Done Right Promise means, in writing, on every Aprilaire duct repair we do in Dallas.
See the difference
Before
After
Before
After
Before
AfterDIY or Call Us?
You can safely inspect the visible ductwork in your attic if you’re comfortable navigating joists: look for sagging flex runs, separated foil tape joints with daylight showing through, and mastic that’s turned brittle and cracked. What you shouldn’t do is start pulling flex duct off a plenum collar or rolling fresh mastic while balancing on a truss in July. Dallas attics hit 130 degrees by midday, and a wrong step through a drywall ceiling costs far more than a service call. The materials themselves aren’t dangerous like a gas valve or a high-tension spring, but the working conditions here are, and so is cutting into a pressurized duct system without checking whether the blower is wired to a live circuit. We work in pairs, we bring the right ladder and lighting, and we pull a permit-lockout on the air handler before we touch anything. If you’re not sure what you’re looking at, call us at (361) 309-3153 and describe it. We’ll tell you honestly whether it needs a tech or just a better filter.
FAQs
Properly applied mastic and UL-rated tape on clean metal collars lasts 12 to 15 years in Dallas, while foil tape alone, the kind many original installs used, fails inside 5 to 7 years in attic heat. We strip old tape and apply mastic over clean steel before re-taping, which is why our seals hold as long as the duct itself. Call (361) 309-3153 for an exact assessment of your attic’s condition.
Yes, if the damage is limited to dried mastic or loose foil tape and the collar metal is intact, a repair takes about an hour per joint and costs less than a full replacement. If the flex duct itself has collapsed or the collar has rusted out, replacement is the only honest fix. We’ll show you photos of what we found before you approve any work.
Most single-joint Aprilaire duct sealing jobs in Dallas take 60 to 90 minutes on site. Re-sealing all takeoffs at the plenum or replacing a failed flex run adds another hour or two depending on attic access. We give you a written time estimate with your quote, and we honor it.
We stock common 6, 8, and 10-inch collars, mastic, UL-rated foil tape, and insulation on every truck, along with standard flex duct lengths. If your Aprilaire cabinet needs a specific boot or transition we don’t carry that day, we source it from a Dallas supply house and return within two business days. We also keep parts on hand for Lennox, Trane, and Carrier systems since so many Dallas homes run mixed-brand setups.
Call Linden Air Duct Dallas for Aprilaire Duct Sealing & Repair
If your Aprilaire system is leaking air into a Dallas attic, you’re paying to condition space you don’t live in. We’ll find the failed seal, show you exactly what we found, and give you one written price before any work begins. The technician who arrives will be background-checked, identity-verified, and introduced to you by name and photo before the visit, with a badge shown at the door, every time. That’s the Threshold Standard we’ve been held to since 2004. If I wouldn’t leave it in my own system, I’m not leaving it in yours. Call (361) 309-3153 for a free estimate on Aprilaire duct sealing and repair in Dallas.
Written by Marcus Veale, Owner, Linden Air Duct Dallas at Linden Air Duct Dallas, serving Dallas and nearby areas.