Duct Sealing and Balancing
Duct Sealing and Balancing
Smart Space Atlanta offers both Aeroseal® technology and manual duct sealing solutions—plus system balancing—to eliminate leaks, reduce energy waste, and keep every room comfortable.
Trusted results for over 12 years.
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Two Proven Ways to Seal and Balance Your Ducts.
With over 12 years of duct diagnostics experience, we routinely find systems leaking 20-80% of their conditioned air. Smart Space applies two proven approaches—Aeroseal internal sealing and Manual exterior sealing—to stop air loss into attics, wall cavities, and crawl spaces and restore system performance.
If your crawl space or basement feels cool on a hot day, your ducts are leaking a significant amount of conditioned air. A duct leakage test can verify this, and many systems show 60%+ leakage.
Aeroseal® Internal Sealing
Smart Space often recommends sealing full or partial metal duct systems with Aeroseal, particularly when the ductwork runs through interior walls.
Our technicians seal the entire duct system with our Aeroseal machine which pressurizes the enter duct system, tests in real time, and seals the entire duct system with a sealant.
We then perform comprehensive pre- and post-testing to verify airflow improvements and confirm total leakage reduction.
Best for: Metal or partial metal duct systems
Why Choose AeroSeal
Metal ducts are typically very leaky because they’re often not sealed during the original installation but they offer excellent long-term performance—they are straight, rigid, durable, and resistant to rodents.
Using Aeroseal technology, we pressurize the system and seal it from the inside, closing gaps and leaks that would otherwise be inaccessible. Other benefits include:
- Meets modern building code standards (≤11% leakage).
- It is the only solution if your leaky metal ducts run through your walls.
- Boosts comfort, air quality, and HVAC performance.
- Reduces strain on your HVAC system.
- Significantly lowers energy costs.
Our AeroSeal Process
- Clean the ducts system with a commercial grade duct cleaning equipment (to optimize the seal).
- Preseal with large disconnects manually with mastic.
- Block off supply and return registers at the air handler.
- Set up specialized AeroSeal equipment: Heater Fan, Computer, Fan Box, Wand, Air Dryer, Compressor, Layflat tubing typically to a return and supply plenum.
- Run our computerized sealing program, distributing the AeroSeal solution through the inside of the entire duct network.
Manual Duct Sealing
Smart Space recommends manually duct sealing for a flexible duct system.
Our technicians seal all accessible leaks using a mastic compound applied to every connection—including plenums, Y-splits, and duct boots.
We then perform comprehensive pre- and post-testing to verify airflow improvements and confirm total leakage reduction.
Best for: Flexible duct systems
Why Sealing Matters
- Current energy codes require duct leakage to be under 11% in new homes. Most older systems leak 20-80%.
- Leaky duct systems pour conditioned air (that you pay for) into crawl spaces, walls, and attics.
- Unsealed return ducts draw in contaminated air from undesirable places (typically crawl space and attics) contributing to poor indoor air quality.
- Balancing airflow ensures every room stays comfortable.
- Results in lower monthly energy bills, comfort, and improved HVAC efficiency.
- Raise your thermostat on a very cold or hot day and go to your duct system, if your ducts are leaky you will typically feel the leakage.
Our Duct Sealing & Testing Process
- Our auditor tests the leakage of the overall system with a duct blaster. The duct blaster tests the overall cubic feet per minute (cfm) of the entire system and can pinpoint the percentage of the overall leakage.
- Our auditor also performs a second test on each individual duct run to determine if a duct run is disconnected which we commonly find. Typically it is a duct run laying on the ground, pouring air into a crawl space or attic.
- Seal all plenums, Y-splits, and duct boots using mastic and UL-listed foil tape.
- Test duct leakage after we have sealed the system again with a Duct Blaster during a post home energy audit and file for duct sealing rebates for you.
Balancing the Air Flow Between Rooms
Balancing airflow by installing manual dampers in each supply duct run is a simple yet highly effective method for improving the performance and comfort of your home.
Why Choose Airflow Balancing with Manual Dampers:
- Ensures even temperature distribution across rooms.
- Improves overall comfort and eliminates hot or cold spots.
- Increases HVAC system efficiency and extends equipment lifespan.
- Reduces energy waste and utility bills.
- Provides better control over airflow for customized comfort.
Our Airflow Balancing Process
Step 1
Inspect the existing duct layout and airflow patterns using precision airflow measurement tools.
Step 2
Identify airflow imbalances and target ducts requiring control adjustments.
Step 3
Install manual balancing dampers in each supply duct run to allow for fine-tuning.
Step 4
Adjust each damper to achieve optimal airflow distribution to all conditioned spaces.
Step 5
Verify and document airflow performance before and after balancing.
Ready to Improve Your Home’s Comfort and Efficiency?
Let’s get started with a free estimate or schedule a Discovery Call today.
We’ll evaluate your duct system and recommend the right solution—manual sealing, AeroSeal, or both—to ensure your home is performing at its best.
What People Are Saying
Smart Home Atlanta did an outstanding job with our energy audit, duct sealing, and crawlspace encapsulation. The difference in efficiency, humidity, and air quality has been massive. High-quality work, excellent communication, and very informative throughout the process—highly recommend!
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Smart Insights
Smart Insights is where Smart Space shares in-depth guides on home performance, building science, and HVAC efficiency—helping you understand what really makes a home comfortable and energy-smart.
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