NH Duct Seal provides commercial Aeroseal duct sealing services for office buildings, retail spaces, schools, municipal buildings, apartment complexes, condominiums, and new construction projects throughout New Hampshire and New England.
Whether you're dealing with comfort complaints, excessive energy loss, or building performance requirements, Aeroseal provides measurable results without major disruption to occupants or building operations.
Commercial Duct Leakage Creates Real Costs
Hidden duct leaks waste conditioned air before it reaches occupied spaces.
For commercial properties, this can lead to:
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Higher utility costs
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Uneven temperatures
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Occupant complaints
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Reduced HVAC efficiency
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Increased wear on equipment
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Difficulty meeting building performance requirements
Because most ductwork is concealed above ceilings or inside walls, leaks are often impossible to locate visually.
Aeroseal seals hidden leaks from inside the duct system without demolition or extensive renovations.
Commercial Buildings We Serve
Existing Commercial Buildings
Older buildings frequently experience hidden air leakage that increases operating costs and creates uneven comfort.
Multifamily Buildings
Apartment complexes and condominiums often struggle with airflow issues and inconsistent temperatures between units.
New Construction Projects
Builders and HVAC contractors increasingly face energy performance requirements that make duct sealing more important than ever.
Renovations and Tenant Improvements
Aeroseal improves HVAC performance without extensive demolition or disruption.
Why Builders and HVAC Contractors Choose NH Duct Seal
Lower Operating Costs
Reduce wasted heating and cooling energy.
Better Occupant Comfort
Deliver more conditioned air where it's needed.
Reduced Equipment Wear
Help HVAC systems operate more efficiently.
Improved Indoor Air Quality
Reduce unwanted contaminants entering the duct system.
Measurable Results
Receive documented before-and-after leakage reports.
Who We Work With
Modern building codes and energy programs increasingly emphasize airtight, efficient HVAC systems.
Because energy requirements vary by state, project type, and local codes, NH Duct Seal works closely with builders, contractors, and project teams throughout New Hampshire and New England to improve HVAC performance and support project objectives.
Builders & Developers
Support multifamily and commercial projects with improved HVAC efficiency, measurable results, and building performance goals.
General & HVAC Contractors
Provide customers with a proven solution for hidden duct leakage without replacing existing duct systems.
Property Managers & Condo Associations
Improve occupant comfort, reduce complaints, and enhance HVAC performance across apartment buildings and commercial properties.
HERS Raters & Energy Professionals
Provide documented before-and-after leakage measurements to support project verification and energy-efficiency objectives.
Every Aeroseal Duct Sealing Project Includes Measurable Results
Unlike traditional duct repairs, Aeroseal provides verified before-and-after leakage measurements.
Customers receive documentation showing:
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Initial leakage levels
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Final leakage levels
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Percentage reduction achieved
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Real-time performance improvements
Our Duct Sealing Process
A simple, proven process that delivers measurable results and improved building performance.
1. Discuss Your Project
Office buildings, multifamily properties, new construction, and commercial facilities all have different goals. We'll review your project and discuss your performance objectives.
2. Measure Duct Leakage
We test your ducts using advanced equipment to determine how much conditioned air is being lost.
3. Seal Hidden Leaks
Aeroseal® technology seals hidden leaks from inside the duct system without major disruption to building operations.
4. Get Documented Results
Every project includes before-and-after leakage measurements and reporting so you can verify the improvement.
5. Lower Operating Costs
Reduce energy waste, improve HVAC efficiency, and support long-term building performance.
Most Jobs Are Completed in Just One Day!
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No major demolition.
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Minimal disruption.
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Little cleanup required.
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Real-time testing.
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Before-and-after verification.
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10-year warranty.
Frequently Asked Questions
Can Aeroseal be used in occupied buildings?
Yes. Most projects can be completed with minimal disruption.
Can Aeroseal help apartment buildings and condominiums?
Yes. Multifamily properties are one of the most common applications.
Will we receive documentation?
Yes. Every project includes before-and-after measurements.
Can Aeroseal improve comfort complaints?
Yes. Hidden duct leakage is often a major contributor to uneven temperatures and airflow problems.
Is Aeroseal safe?
Yes. The process uses a safe, non-toxic sealant and has been used in thousands of buildings nationwide.
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
