Revolutionize Your Energy Efficiency: Aeroseal Ductwork Solutions in New York
Up to 40% of heating and cooling energy is lost before it ever reaches the room — the culprit is almost always leaky ductwork. Here's how Aeroseal's inside-out sealing technology closes that gap for commercial buildings across NYC.
The Hidden Cost of Leaky Ductwork
Energy emissions keep climbing every year, and increased usage isn't the only reason why. A large share of the problem is simple waste — energy generated, paid for, and then lost before it ever does its job. In commercial and residential buildings alike, the most common source of that waste is leakage in the ductwork.
Holes, gaps, and separated seams are common in ductwork throughout New York, in both residential and commercial buildings. Even with a skilled installation team, it's extremely difficult to guarantee an airtight seal at every joint, elbow, and connection in a duct run — especially in older buildings or systems that have been modified or expanded over time.
Research highlighted by the U.S. Department of Energy points to a familiar pattern: many building owners simply accept wasted energy and poorly balanced temperatures because sealing every duct connection by hand is so difficult to get right. Residential and commercial buildings together account for roughly two-fifths of total U.S. energy consumption, and that same sector generates close to a tenth of the country's total greenhouse gas emissions. When ductwork is the weak link, a meaningful share of that energy — and the money spent generating it — never reaches the space it was meant to condition.
How Aeroseal Seals Ductwork From the Inside Out
Aeroseal took nearly seven years to move from laboratory research to a commercially available product, and the approach it uses is genuinely different from traditional duct repair. Instead of patching accessible joints from the outside, technicians seal the entire system from the inside.
Isolate the system
Every supply and return opening is temporarily closed off, turning the ductwork into a sealed, pressurized environment.
Apply the sealant
A fine polymer sealant is circulated through the ducts under pressure, where it finds and fills cracks, holes, and separated seams from within.
Verify the result
Leakage is measured before and after the process, giving building owners a documented reduction — typically 90 to 95 percent — rather than a guess.
Why This Matters for NYC Building Owners
New York's commercial building stock spans a wide range of ages, layouts, and duct configurations — from prewar mechanical shafts to sprawling modern retail spaces. The rapidly developing technologies available today give building owners far more opportunity to build and retrofit for real energy efficiency, which lowers both operating costs and the emissions tied to that energy use.
Because ductwork accounts for so much of that avoidable loss, sealing it is one of the most cost-effective efficiency improvements a commercial property can make in Brooklyn, Manhattan, Queens, The Bronx, or Staten Island — often with a faster payback than equipment replacement alone.
Even the best-installed ductwork leaks. Factory-certified equipment and skilled installation reduce leakage, but they can't eliminate it entirely — every duct system has dozens of joints, elbows, and transitions where small gaps can form over time.
Find Out How Much You're Losing
Request a duct leakage assessment for your NYC property and see the numbers before you commit to a sealing project.
Proven Worldwide, Now Available Locally
Aeroseal has expanded well beyond its original U.S. market and is now used across Europe, the Middle East, Canada, and Australia. Its growth reflects a problem that isn't unique to any one region — leakage is consistently the leading source of energy loss in ductwork for households and commercial buildings alike.
As energy costs continue to rise across New York, more building owners are turning to duct sealing as a practical way to reduce waste without a full system overhaul — one duct at a time.
How Denair HVAC Brings Aeroseal to Your Building
Denair HVAC evaluates your existing ductwork, identifies where leakage is costing you the most, and integrates Aeroseal sealing into a broader energy management plan — so the improvement shows up in your utility bills, not just on paper.
Duct Leakage Testing
Pressurization testing that quantifies exactly how much energy your ductwork is losing.
Aeroseal Duct Sealing
Inside-out sealing that closes cracks, gaps, and seams without opening walls or ceilings.
Air/Water Test & Balance
Confirming airflow reaches every zone evenly once leakage has been eliminated.
Energy Management
Pairing duct sealing with controls and automation for compounding energy savings.
Preventative Maintenance
Ongoing service plans that keep sealed ductwork and connected equipment performing.
LL97 Compliance Support
Factoring duct efficiency into your building's broader Local Law 97 strategy.
Frequently Asked Questions
Aeroseal seals leaks from inside the ductwork rather than from the outside. Technicians close off the supply and return openings, then circulate a fine polymer sealant through the system, which bonds to the edges of cracks, holes, and separated seams and closes them from within as it cures.
As much as 40 percent of heating and cooling energy can be lost through duct leakage in a typical system. That waste shows up as higher utility bills, uneven temperatures between floors or zones, and equipment running longer than necessary to compensate.
Aeroseal typically eliminates 90 to 95 percent of duct leakage. Results are measured and verified before and after the process with duct pressurization testing, so you get a documented comparison rather than an estimate.
Aeroseal is far less invasive than traditional duct repair. Because the sealant is applied from inside the existing ductwork, there's no need to open walls, ceilings, or floors to reach every joint. Most commercial applications are completed in a single visit with minimal disruption to building operations.
Yes. Reducing duct leakage lowers the energy an HVAC system needs to condition a space, which reduces overall energy consumption and associated emissions. For NYC buildings managing their LL97 carbon footprint, duct sealing is a comparatively low-cost step that supports broader efficiency and compliance goals.
Let's Seal the Gaps in Your Ductwork
Bid farewell to wasted energy. Our team brings Aeroseal duct sealing to commercial buildings across Brooklyn, Manhattan, Queens, The Bronx, and Staten Island.
