Measured Leakage Reduction
Real Aeroseal Results
Measured on Every Project
Reduce wasted conditioned air, improve HVAC efficiency,
and get more of the heating and cooling you’re already paying for.
Real Project Results
Belcherville, MA
Aeroseal reduced measured duct leakage from 863.1 CFM to 16.6 CFM, while the equivalent leakage opening dropped from 163.1 square inches to just 3.1 square inches.
For perspective: Before sealing, the system was leaking roughly 43 refrigerators of air every minute while the system was running.
BEFORE SERVICE
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54% of system capacity leaking
AFTER SERVICE
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1% of system capacity leaking
Killington, VT
BEFORE SERVICE
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33% of system capacity leaking
AFTER SERVICE
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0.82% of system capacity leaking
Aeroseal reduced measured duct leakage from 526.4 CFM to 13.2 CFM, while the equivalent leakage opening dropped from 99.5 square inches to just 2.5 square inches.
For perspective: Before sealing, the system was leaking roughly 26 refrigerators of air every minute while the system was running.
Nashua, NH
BEFORE SERVICE
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11% of system capacity leaking
AFTER SERVICE
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0.53% of system capacity leaking
Aeroseal reduced measured duct leakage from 85.4 CFM to 4.3 CFM, while the equivalent leakage opening dropped from 16.1 square inches to just 0.8 square inches.
For perspective: Before sealing, the system was leaking roughly 4 refrigerators of air every minute while the system was running.
Guilford, NH
BEFORE SERVICE
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42% of system capacity leaking
AFTER SERVICE
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2.5% of system capacity leaking
Aeroseal reduced measured duct leakage from 338.9 CFM to 19.9 CFM, while the equivalent leakage opening dropped from 64.0 square inches to just 3.8 square inches.
For perspective: Before sealing, the system was leaking roughly 17 refrigerators of air every minute while the system was running.
Bedford, NH
BEFORE SERVICE
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36% of system capacity leaking
AFTER SERVICE
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2.9% of system capacity leaking
Aeroseal reduced measured duct leakage from 714.4 CFM to 58.9 CFM, while the equivalent leakage opening dropped from 135.0 square inches to just 11.1 square inches.
For perspective: Before sealing, the system was leaking roughly 36 refrigerators of air every minute while the system was running.
What Do These Numbers Mean?
Aeroseal reports provide several ways to understand how much air is leaking from a duct system before and after sealing.
CFM of Leakage
CFM stands for cubic feet per minute. It measures the volume of air leaking from the duct system during testing. A higher CFM measurement indicates a greater amount of duct leakage.
Equivalent Leakage Opening
Aeroseal also converts the measured leakage into an equivalent opening size in square inches.
This doesn’t mean there is one large physical hole somewhere in the ductwork. Instead, it helps illustrate the combined effect of leaks throughout the tested duct system.
Percentage of System Capacity
The report also compares measured duct leakage with the airflow capacity of the system. This provides another way to see how much of the system’s capacity was represented by leakage before and after sealing.
Putting CFM Into Perspective
CFM measurements can be difficult to visualize.
For the comparisons above, we use 20 cubic feet as a simple refrigerator-sized volume. That gives homeowners an easier way to picture the amount of air represented by the CFM measurement.
For example, 863.1 CFM is roughly 43 refrigerators of air every minute while the system is running.
These comparisons are provided only to help visualize air volume. They are not measurements of energy use, heating or cooling loss, or energy savings.
Before and After Results You Can Measure
Aeroseal testing measures duct leakage both before and after the sealing process, providing a direct comparison of how much leakage was reduced.
The project reports measure leakage in cubic feet per minute at a standardized test pressure of 25 Pa.
That means every project has a documented starting point and a documented result — not simply an estimate of how much leakage may have been sealed.
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
