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 in Hempstead: What to Know First
We seal ductwork in Hempstead homes with Aprilaire filtration and air systems, and most jobs are finished in a single visit. Sealing typically runs $450 to $900 depending on how much of your duct runs are accessible, and we hand you a written price before any work starts. If you own an Aprilaire whole-home air purifier, dehumidifier, or fresh air ventilator and your duct joints are leaking, call (516) 559-4917 and we’ll schedule a time that fits your week.
This page is for Hempstead homeowners who want to know why their Aprilaire system isn’t delivering the air quality they paid for, what duct sealing actually involves, and what it costs. Roy Castellanos and our crew have worked on enough Aprilaire installs across Hempstead and the surrounding Nassau County neighborhoods to know exactly where these systems leak and why.
How Aprilaire Products Fail – and How We Fix Them
- Model 5000/7000 electronic air cleaners pulling air through unsealed return ducts. These units move serious air volume, and when the return side has gaps at the plenum or branch takeoffs, the system sucks attic or basement air straight into your filter. You’ll see dust collecting on furniture within days of cleaning. We seal the return runs with mastic and foil tape, then verify static pressure at the Aprilaire cabinet.
- Model 1850/1830 dehumidifiers cycling more than they should. When supply ducts leak into unconditioned spaces, humidity creeps back into the home and the dehumidifier runs constantly trying to keep up. In Hempstead summer conditions, that’s a compounding problem: leaky ducts plus Long Island humidity equals an Aprilaire unit working twice as hard. We find those leaks by hand, not with guesswork, and seal every accessible joint.
- Model 8145/8144NC fresh air ventilators pulling dirt from the chase. These ventilators bring outdoor air in, and if the duct connections at the unit or the intake are loose, they pull whatever is in the wall cavity along with it. Homeowners near Hempstead Lake State Park deal with more airborne organic matter than most, and a loose ventilator duct defeats the whole point. We seal the intake side with code-appropriate mastic and verify airflow with a manometer.
- Aprilaires installed on older Hempstead duct systems with original tape failing. A lot of the housing stock around Hempstead predates modern sealing standards. The original gray duct tape, if it was ever the right product at all, dries out and peels after 15 or 20 years. Your Aprilaire may be filtering or conditioning air that leaks out before it reaches the rooms. We remove the failed material and seal with mastic rated for HVAC use, which outlasts tape by a wide margin.
- Aprilaire filter housings with gaps at the slot. On the media filter cabinets, we routinely find the filter sits loose in its track, letting unfiltered air bypass the Aprilaire media entirely. That’s a five-minute fix during a sealing visit, but it makes a real difference in what actually reaches your lungs.
Styles & brands we work with
Our Aprilaire Duct Sealing Process
- 1
You call (516) 559-4917. Roy Castellanos or one of the team answers, asks about your Aprilaire model and the symptoms you’re noticing, and we set a window that works.
- 2
We inspect the full duct system. From the Aprilaire unit connections to the farthest register, we’re looking for failed tape, loose joints, gaps at the plenum, and bypasses around the filter housing. We test with a manometer where it helps us quantify what we already saw with our eyes.
- 3
We price it in writing. Before any work starts, you get a written quote covering the sealing work, the materials, and nothing you didn’t ask for. The price does not move at the door.
- 4
We seal every accessible joint. We use HVAC mastic and foil tape on accessible ductwork, paying special attention to the Aprilaire cabinet connections where most installers cut corners. Bigger gaps get closed with sheet metal or collar work where needed.
- 5
We verify airflow and pressure. After sealing, we confirm the system moves air the way it should and that your Aprilaire is no longer pulling dirt or humidity through leaks.
- 6
We leave the site clean and hand you the guarantee in writing. Every job is covered by our 365-Day Done Right Promise. If the sealing fails within a year, we come back and make it right at no charge, including a free second visit.
See the difference
Before
After
Before
After
Before
AfterWhat Aprilaire Duct Sealing Costs in Hempstead
Here’s an honest look at what homeowners in Hempstead pay for Aprilaire duct sealing with our crew:
| Scope of Work | Typical Range |
|---|---|
| Seal accessible supply and return joints, one Aprilaire unit | $450 – $700 |
| Above plus filter housing gap repair and plenum reseal | $700 – $900 |
| Larger homes with multiple Aprilaire units or long duct runs | $900 – $1,400 |
What moves the price is access. If your ducts run through a finished basement ceiling or tight attic chases, the work takes longer. If the Aprilaire cabinet itself needs a bracket or collar repair, that adds parts. We don’t charge per vent and we don’t surprise you with add-ons. Call (516) 559-4917 for a free estimate based on your actual system.
Why Hempstead Homeowners Call Hollis Air Duct Hempstead for Aprilaire Work
We’ve been in business since 2004, and the standard we operate under is simple: show up inside the window, price it in writing before we touch anything, do the job by the book, and leave the site cleaner than we found it. The Garrison Code governs how our techs behave on a job. When Roy Castellanos sends a background-checked, uniformed technician to your Hempstead home, you know who’s walking through the door before they arrive.
The 365-Day Done Right Promise means what it says. If the sealing work fails within a year, we come back at no charge. Not a credit toward another visit, not a re-diagnosis fee. A free second visit, included, in writing. And while Aprilaire is a big part of what we see in Hempstead, we also work on Lennox, Trane, and Carrier systems, so we’re not going to look confused if you have a mixed-brand setup.
FAQs
No. Sealing the ductwork connected to your Aprilaire unit does not void the manufacturer’s warranty, and in fact a leaking duct system can cause the unit to run in ways that accelerate wear. We’re an independent Aprilaire service provider and we seal to code without modifying the unit itself, so your warranty stays intact.
Most Aprilaire duct sealing jobs in Hempstead are completed in a single visit of four to six hours, depending on access. We schedule inside a quoted window and our calls are answered by a live person 24/7, so you won’t be chasing a voicemail loop to book. Call (516) 559-4917 and we’ll find a day that works.
Duct tape, the gray cloth kind, fails on HVAC systems. It dries out, the adhesive breaks down from temperature swings, and within a couple of seasons it’s peeling again. HVAC mastic and foil tape are the materials that actually stay sealed. If you want the job to hold, use the right product and verify airflow after. Or call us and we’ll do it correctly the first time.
We test with a manometer where it makes sense, which measures air pressure and confirms flow is moving through the ducts and the Aprilaire unit as designed. You’ll also notice it in practical terms: less dust on furniture, a dehumidifier that cycles normally, and air that reaches rooms that used to stay stale. If it doesn’t hold up within a year, our 365-Day Done Right Promise brings us back at no charge.
Usually the cheaper quote is sealing fewer joints or excluding the Aprilaire cabinet connections altogether. Some outfits quote a low number and find reasons to add costs once they’re in the attic. We give you a written price before any work begins and that price does not move at the door. Call (516) 559-4917 and we’ll tell you what we’d actually do and what it costs.
Clean ducts, straight answers, that’s the whole job.
Written by Roy Castellanos, Owner, Hollis Air Duct Hempstead at Hollis Air Duct Hempstead, serving Hempstead and nearby areas.