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 Brooklyn Owner’s Guide
We stock Aprilaire-compatible duct sealing and repair parts on our trucks for most Brooklyn service calls, and the typical installed repair runs between $340 and $580 depending on the model line and what failed. Most Aprilaire duct sealing jobs are same-visit fixes, not multi-day projects.
Usually, a homeowner notices something before they know what to call it. A bedroom that has stayed stubbornly warm all summer. A utility bill that keeps inching up. Or the quiet rush of air behind a wall where there should not be one. When we open the duct run, the story is usually written in the tape and the joints: old Aprilaire seals that have dried, cracked, or pulled away from the collar entirely. That is what led you here, and we can fix it in one visit with the right part on hand.
Which Aprilaire Models This Applies To
Aprilaire does not sell one universal duct sealing kit. Their sealing components follow the product families: the Aprilaire 800 and 700 series humidifiers use specific collar and bypass duct fittings, while whole-home dehumidifier models like the E080 and E100 pair with 8-inch and 10-inch round duct work that requires matching compression seals. The easiest way to identify what you need is to check the label on the inside of the access panel. It lists the model and sometimes the build date, which matters because Aprilaire changed seal compounds around 2017. Older units used a foam gasket that dries out faster in Brooklyn’s steam-heated apartments; newer units use a silicone-based edging that holds up better in our humidity swings.
If the label is gone or faded, measure the duct collar diameter with a tape measure, not a guess. An eighth of an inch off means the seal will not seat and you will be chasing leaks forever. As for OEM versus aftermarket: for Aprilaire specifically, we recommend OEM seals when the unit is under warranty or when the part is a proprietary molded gasket. For generic collar seals and mastic tape, a quality commercial aftermarket brand, like the ones we carry alongside our Rotobrush and Nikro gear, performs equal to OEM at a lower price. We will tell you which one we are quoting and why before we do anything.
Mortons Air Duct Brooklyn is an independent service provider and not affiliated with Aprilaire. We also stock parts for Lennox, Trane, and Carrier systems, which matters if your Aprilaire duct work ties into a larger system with mixed equipment.
Styles & brands we work with
Signs Your Aprilaire Duct Sealing & Repair Is Failing
- Persistent musty smell from one register. When an Aprilaire seal fails at the collar, condensation forms where warm Brooklyn room air meets the cooler duct surface. That dampness attracts mildew, and the smell only shows up when the blower cycles on.
- White dust or lint trails around a vent flange. This is dried sealant or foam gasket material breaking down and getting pulled into the airflow. If you see a fine white powder on the register grille, the seal is actively degrading.
- Airflow that is strong at the unit but weak at far registers. A failed seal in a middle duct run bleeds air into the wall cavity before it reaches the far rooms. Your system is working harder to deliver less, which shows up in both comfort and the electric bill.
- Noticeable temperature difference between rooms on the same zone. The room nearest the air handler often feels fine while the far bedroom or a finished basement stays five or six degrees off. That imbalance in Brooklyn homes, especially in pre-war buildings near Prospect Park where duct runs are long, usually traces back to a leaking joint.
- New ticking or fluttering sound when the blower runs. A loose collar with a failing seal can vibrate against the duct board. It is a small sound, but it means a fitting has separated far enough to move with airflow pressure.
Replacement Cost & What’s Included
In Brooklyn, expect to pay between $340 and $580 for Aprilaire duct sealing and repair on a typical residential system. The range depends on three things: how accessible the failing section is, whether the repair is a single collar seal or a full run of collapsed or separated duct, and whether the part is OEM Aprilaire or a commercial aftermarket equivalent we trust and stock.
| Job Type | Typical Brooklyn Installed Price | What It Covers |
|---|---|---|
| Single collar or joint seal replacement | $340 – $420 | Part, labor, inspection of adjacent joints, written invoice |
| Multiple seal repairs (2-4 joints) | $420 – $520 | All parts, labor, airflow verification at registers |
| Full-run repair with duct sealing | $520 – $580 | Sealing compound or tape, collar replacement as needed, full system check |
Every quote is written before we touch a tool. You will see the part price and the labor as separate lines, and the number on the quote is the number on the invoice. There is no per-vent add-on and no surprise material fee after the fact. The work carries our 365-Day Done Right Promise: if a seal we installed fails within a year, we come back and make it right at no charge. Full stop.
See the difference
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After
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After
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AfterDIY or Call Us?
There are two checks a homeowner can do safely: take a look at visible duct work in an unfinished basement or utility closet, and feel for air escaping around collar joints when the system runs. That tells you something is wrong. It does not tell you where every leak is, and duct sealing is not a caulk-and-hope job.
Where DIY goes wrong for Aprilaire systems is in the details that are not obvious until you open the duct: a collapsed inner liner, a joint that separated behind a finished wall, a seal that failed because the duct itself shifted and needs to be re-supported before it gets re-sealed. If you seal over a bad support, the leak comes back in months. If you use the wrong compound, you lock in a problem that costs more to undo than the original fix. That is not scare talk; it is what we see every week. If you want a second set of eyes before you commit to anything, call (607) 536-9605 and we will give you a straight answer and a written price.
FAQs
Most Aprilaire seals last 8 to 12 years in Brooklyn homes, but those in steam-heated pre-war buildings near Prospect Park tend to fail closer to the 7-year mark because the heat cycles dry out the gasket material faster. The 2017-and-newer silicone compound seals hold up longer than the older foam type.
In most cases, no. Once an Aprilaire seal has cracked or pulled away from the collar, the material has already degraded and patching over it just hides the problem until it fails again. Replacement is the real fix, and it is usually the same price as a partial repair once labor is factored in.
Most single or multi-joint Aprilaire seal repairs take two to three hours on site. Full-run repairs with duct resealing can take half a day. We will tell you the expected time window in the written quote before the crew starts.
Yes. Our trucks carry the most common Aprilaire collar sizes, replacement gaskets, and sealing compounds for the 700 and 800 series humidifiers and the E-series dehumidifiers. For less common parts, we can usually source them from our Brooklyn-area suppliers within one business day. Call (607) 536-9605 and we will verify stock before you schedule.
Talk to Paul and His Team First
If your Aprilaire system is leaking air or showing any of the signs above, do not wait until the utility bill climbs again. Call Mortons Air Duct Brooklyn at (607) 536-9605 for a free, written estimate. Paul Adeyemi will tell you what we see, what it costs, and what we plan to do about it – in that order. Every visit includes a written price before work starts, shoe covers and drop cloths inside your home, and a photo of the clean-up before the crew leaves. That is the Cedarwell Care Promise, and it has been how we work in Brooklyn since 2005.
Written by Paul Adeyemi, Owner, Mortons Air Duct Brooklyn at Mortons Air Duct Brooklyn, serving Brooklyn and nearby areas.