Why Are My Energy Bills So High?
If your heating and cooling costs seem to increase every year, you're not alone.
Many homeowners throughout New Hampshire and New England are surprised to learn that leaking ductwork may be wasting heated and cooled air before it ever reaches the rooms you're trying to keep comfortable.
NH Duct Seal helps homeowners improve energy efficiency and reduce wasted energy with professional Aeroseal duct sealing technology.
How Does Leaky Ductwork Increase Energy Costs?
If your heating and cooling bills keep climbing, your HVAC system may not be the only thing to blame.
Many homes lose a significant amount of conditioned air through hidden leaks in the ductwork before it ever reaches the rooms you're trying to heat or cool. That means your HVAC system has to run longer, work harder, and use more energy to maintain a comfortable temperature.
The illustration below shows how leaky ducts can waste heated and cooled air—and how professional Aeroseal duct sealing helps keep more of that conditioned air where it belongs.
How Aeroseal Helps Lower Energy Costs
Leaking ductwork can waste up to 20–30% of the heated and cooled air your HVAC system produces.
By sealing those hidden leaks from the inside, Aeroseal helps deliver more conditioned air to the rooms that need it, reducing wasted energy and improving overall system efficiency.
While every home is different, many homeowners notice:
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Lower heating and cooling costs
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More consistent indoor temperatures
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Better airflow from vents
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Reduced strain on the HVAC system
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Improved overall comfort
Signs Your Duct System May Be Wasting Energy
Leaking ductwork can waste up to 20–30% of the heated and cooled air your HVAC system produces.
By sealing those hidden leaks from the inside, Aeroseal helps deliver more conditioned air to the rooms that need it, reducing wasted energy and improving overall system efficiency.
While every home is different, many homeowners enjoy:
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Lower heating and cooling costs
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More consistent indoor temperatures
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Better airflow from vents
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Reduced strain on the HVAC system
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Improved overall comfort
Common Areas Where Duct Leaks Occur
Most homeowners and business owners never see their ductwork, which means small leaks can go unnoticed for years. In fact, many HVAC systems lose conditioned air through loose connections, joints, and seams long before it reaches the rooms you're trying to heat or cool.
Leaks are most common where sections of ductwork connect, change direction, or pass through unconditioned spaces like attics, crawl spaces, garages, and basements. Even small openings in these areas can reduce airflow, increase energy costs, and force your HVAC system to work harder than necessary.
Aeroseal technology seals these hidden leaks from the inside of your ductwork, restoring conditioned airflow where it belongs without opening walls, ceilings, or floors. More heated and cooled air will reach the rooms where you need it most and reduce the stress on your HVAC system.
The result is a more efficient HVAC system, more consistent temperatures, and improved comfort throughout your home or building.
Why Choose NH Duct Seal
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Residential & Commercial Service
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Non-Invasive One-Day Process
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Before-and-After Leakage Verification
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Serving New Hampshire & New England
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Certified Aeroseal Professional
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Licensed and insured
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40+ years of experience
Frequently Asked Questions
Can duct leaks really increase energy bills?
Yes. When conditioned air escapes through leaks in your ductwork, your HVAC system has to run longer to maintain the temperature you've set. That extra runtime increases energy consumption and can lead to higher monthly heating and cooling costs.
How much energy can leaking ducts waste?
In many homes, leaky ductwork can waste up to 20–30% of the heated and cooled air your HVAC system produces. The exact amount varies depending on the size, location, and condition of your duct system, but sealing those leaks can significantly improve overall efficiency.
Will Aeroseal pay for itself?
Every home is different, so there's no guaranteed payback period. However, many homeowners experience lower heating and cooling costs after sealing their ductwork. In addition to potential energy savings, Aeroseal can improve comfort, airflow, and reduce strain on your HVAC system, providing value beyond utility bill savings alone.
Is duct sealing worth it?
If your home has hidden duct leaks causing uneven temperatures, weak airflow, or high energy bills, professional duct sealing is often one of the most effective HVAC efficiency upgrades you can make. Unlike replacing your entire HVAC system, Aeroseal seals leaks from the inside with minimal disruption and no demolition.
Can I improve efficiency without replacing my HVAC system?
Often, yes. Many homeowners assume they need a new furnace or air conditioner when the real problem is conditioned air leaking from the duct system. By sealing hidden leaks, Aeroseal helps your existing HVAC equipment deliver more heated and cooled air where it's needed, improving efficiency and comfort without replacing the entire system.
About NH Duct Seal
With more than 40 years of experience, Dale Sanford has helped homeowners throughout New Hampshire and New England solve comfort and energy-efficiency challenges.
As a licensed and insured Certified Aeroseal Professional, Dale focuses exclusively on helping homeowners improve comfort and energy performance through Aeroseal duct sealing technology.
Why Choose NH Duct Seal?
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Over 40 years of experience
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Licensed and insured
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Certified Aeroseal Professional
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Personalized service
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Serving New Hampshire and New England
