Duct Sealing

Understanding the Hidden Energy Drain in Your Home

Your home’s ductwork operates like the circulatory system of your HVAC equipment, delivering heated and cooled air throughout every room. When we inspect duct systems across Lincoln, NE, we consistently find that even newer homes lose between 20-30% of their conditioned air through gaps, cracks, and poorly connected joints. This means nearly a third of the energy you’re paying for never reaches its intended destination, escaping into unconditioned spaces like attics, crawl spaces, and wall cavities.

At Harley's Heating and Air Conditioning, our NATE-certified technicians have been identifying and solving these efficiency problems since 1970. We use advanced diagnostic equipment including duct blasters and thermal imaging cameras to pinpoint exactly where your system is losing precious conditioned air. These leaks force your heating and cooling equipment to work overtime, driving up utility bills and reducing equipment lifespan.

The Comprehensive Duct Sealing Process

Professional duct sealing begins with a thorough inspection and pressure testing of your entire duct system. We start by sealing off all supply and return registers, then use specialized equipment to pressurize the ductwork. This process reveals the total amount of air leakage measured in cubic feet per minute (CFM), giving us a baseline for improvement. Our technicians document problem areas with detailed photographs and measurements, ensuring complete transparency throughout the repair process.

The actual sealing work involves multiple specialized materials and techniques depending on the type and location of leaks. For accessible joints and connections, we apply mastic sealant—a thick, paste-like substance that remains flexible after curing, accommodating the natural expansion and contraction of ductwork. Unlike standard duct tape that deteriorates within a few years, mastic creates permanent seals that last the lifetime of your system. For larger gaps or damaged sections, we combine mastic with fiberglass mesh tape, creating a reinforced barrier that prevents future separations.

Advanced Sealing Technologies and Materials

Modern duct sealing has evolved far beyond simple tape and caulk solutions. We employ aerosol-based sealing technology for ductwork hidden behind walls and ceilings, eliminating the need for costly demolition. This innovative process involves injecting polymer particles into pressurized ducts, where they automatically seek out and seal leaks from the inside. The particles accumulate around leak edges, gradually building up until the opening is completely sealed.

For exposed ductwork in attics and basements, we also address insulation deficiencies that compound energy losses. Properly sealed ducts require adequate insulation to prevent condensation problems and thermal losses. We wrap accessible ductwork with R-6 to R-8 insulation, paying special attention to connections near unconditioned spaces where temperature differentials are greatest.

Measurable Benefits and Return on Investment

• Energy Savings: Properly sealed ductwork typically reduces heating and cooling costs by 15-25%, with some homes in Lincoln, NE & the surrounding areas seeing even greater improvements
• Enhanced Comfort: Eliminating leaks ensures consistent temperatures throughout your home, ending those frustrating hot and cold spots
• Improved Air Quality: Sealed ducts prevent contaminated air from garages, crawl spaces, and attics from entering your living spaces
• Extended Equipment Life: Reduced runtime means less wear on your furnace and air conditioner components

The investment in professional duct sealing typically pays for itself within 2-3 years through energy savings alone. Since 1970, our family-owned operation has helped thousands of homeowners achieve these benefits while maintaining our commitment to accurate, friendly, and reliable service without overtime fees—even on emergency calls available 24/7.

When to Consider Professional Duct Sealing

Several indicators suggest your ductwork needs professional attention. Unusually high energy bills despite moderate thermostat settings often point to significant air leakage. Rooms that never seem to reach comfortable temperatures, excessive dust accumulation around vents, and whistling sounds from ductwork all indicate sealing opportunities. We also recommend duct sealing when replacing HVAC equipment, as properly sealed ducts allow new systems to operate at peak efficiency from day one.

Our compassionate approach means we’ll thoroughly explain findings and recommendations without high-pressure sales tactics. With five decades of experience serving homeowners throughout the area, we understand that duct sealing represents an important investment in your home’s comfort and efficiency. Our responsive team schedules convenient appointment times and completes most residential duct sealing projects within a single day, minimizing disruption to your daily routine while maximizing long-term comfort and savings.