Professional Duct Sealing Services in Lewisville & Plano, TX
Duct Sealing
Stop Losing Air —and Money—Through Leaky Ducts
Leaky ductwork isn’t just a minor issue—it’s a major energy drain. At Kelly’s Heating and Air, we offer expert duct sealing services that restore your home’s comfort, lower energy bills, and improve air quality. Whether you’re noticing uneven temperatures, weak airflow, or dust buildup, our NATE-certified team is here to seal the leaks and bring balance back to your system.
- Seal Hidden Leaks Fast
- Improve System Efficiency
- Lower Heating & Cooling Bills
- Reduce Dust and Allergens

Seal Leaks. Save Comfort. Count on Kelly’s
Leaky ducts don’t stand a chance. At Kelly’s Heating & Air, we make duct sealing quick, affordable, and built to last—so your home feels fresher, cleaner, and more comfortable in every room.
Why Choose Kelly’s Heating & Air?
Your Go-To Pros for Ductwork Fixes in Texas
At Kelly’s Heating and Air, we bring over a century of experience to every duct sealing job in Lewisville and beyond. From uneven airflow to rising energy bills, our team knows exactly how to spot—and stop—air leaks. With licensed technicians, 24/7 availability, and a reputation built on trust, we restore comfort with every seal.
Cutting-Edge
Latest tools for precise duct sealing
Eco-Friendly
fixes for healthier home air
Availability
Call anytime for fast, expert service
Signs Your Ducts May Be Leaking
Even with your system running, leaky ducts can leave rooms unevenly heated and full of dust. At Kelly’s Heating and Air, we seal the gaps that waste energy and comfort. Watch these red flags for leaky ducts.
Hot or Cold Spots in Rooms
Unexpected Utility Bill Spikes
Persistent Dust Around Home
Weak Airflow from Vents
Noisy or Whistling Ducts
Allergies Flare Up Indoors
The Benefits of Expert Duct Sealing Services
Stronger Airflow, Lower Bills, Healthier Home
Uneven temps? Dust everywhere? That mystery cold spot in the hallway? Leaky ducts could be the culprit. At Kelly’s Heating and Air, we help Lewisville homeowners seal the gaps—literally. Our duct sealing solutions improve airflow, cut energy waste, and help your system work smarter, not harder.
Stop Energy from Escaping
Reduce Dust and Allergens
Balance Room-to-Room Temps
Lower Heating and Cooling Costs
Improve Indoor Air Quality
With over 100 years of trusted service and a crew trained in the latest sealing techniques, we know what it takes to fix inefficient ducts. Whether it’s in the attic, crawlspace, or behind your walls, we make sure the air you pay to heat or cool stays where it belongs—inside your home.

Professional Duct Leak Repair & Sealing in Lewisville and The Colony
Expert Duct Solutions for a Leak-Free Home
Duct Leak
Inspection
Catch hidden leaks early to stop air loss and lower those rising utility bills.
Duct Joint
Sealing
Lock in every connection to keep your rooms evenly comfortable—no more hot or cold spots.
Damaged
Duct Repair
Restore airflow fast to eliminate temperature swings and keep your home consistently cozy.
Duct Pressure
Testing
Test airflow levels to ensure your system isn’t overworking—and driving up your energy bills.
Duct Insulation
Service
Add proper insulation to stop heat loss and help your HVAC work smarter, not harder.
System Efficiency
Verification
Verify system performance after sealing so every room feels just right—without the waste.
24/7 Emergency Duct Sealing in Denton, TX & Oklahoma
When Comfort Slips, Kelly’s Is Ready
Leaky ducts can strike at the worst time—leaving rooms too warm, too cold, or your energy bills climbing. At Kelly’s Heating and Air, our emergency response team is on call 24/7 to seal up the problem and restore comfort fast.
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Fast Response, Lasting Results
From disconnected ducts to airflow loss, we find and fix the issue quickly—so your home gets back to normal without delay.
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Expert Work, No Guessing
With over 100 years of HVAC experience, our team uses proven sealing methods and quality materials to lock in comfort and save energy. Whether it's 2 p.m. or 2 a.m., trust Kelly’s for airtight solutions, anytime.
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Kelly’s Heating and Air Success Stories: Client Testimonials
See What Our Customers Have to Say

We sent Kelly's AC an online appointment and an email on Sunday evening explaining our AC issues. We received a phone call at 8:30am Monday and they were at our home at 1:00PM. Our AC was repaired by 2:00PM. WHAT GREAT SERVICE! GREAT PRICE! Got us out of a Major Jam. We Love this Company, we highly recommend them and will definitely use them again. Thanks so much Kelly's AC and your AC Tech Eddie Costa was Great 🙂 Mick & Nikki Pasmore
Quality Service, Affordable Prices
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Professional
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Professional
$65
/ Services
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