Category Archives: Duct Sealing

What is Aeroseal?

AerosealMost homes have leaky ductwork to some degree, and that reduces air quality while costing you comfort and money. In an average home, about 30 percent of conditioned air is lost to leaks, according to the U.S. Department of Energy. But Rodenhiser offers Massachusetts homeowners an effective and affordable solution: Aeroseal.

This technology changes the way many people think about duct leaks. If you consider the location of your home’s ductwork, it’s hard to imagine accessing all of it. Finding and sealing leaks that might be tucked away in the farthest recesses probably seems impossible. But that’s what Aeroseal does.

Watch how Aeroseal works:

Finding Leaks Where They Hide

There’s no such thing as a typical location for ductwork leaks. Some areas are more prone, such as seams and bends, but leaks can pop up anywhere in the network. Instead of locating every gap and sealing them one by one, an Aeroseal treatment focuses on sealing every leak at once. This tells us exactly how much air your ductwork is losing.

We seal off the registers throughout your home and run a pressure test. That shows us the extent of the problem and how much air is being lost. Then we temporarily seal off your HVAC system from the ductwork to prevent any of the material from getting inside and causing damage.


Aeroseal reaches all of the places that you can’t get to.

Sealing Every Leak in Your Ductwork

Once the system is prepped, then the Aeroseal process starts. We inject aerosol sealant particles into the ductwork and keep them from settling right away by circulating the air inside. That gives the material a better chance of finding its way to leaks instead of landing and sticking where it’s not needed.

This process seals the ducts from the inside, which is a more effective method than aluminum tape and mastic applied from the outside. It not only finds more leaks, but it seals them permanently. And unlike mastic sealants, only a few ounces of Aeroseal is required to do an average home.

Gauging the Results

After the Aeroseal treatment is complete, we don’t leave you wondering whether or not it worked. The whole process, beginning to end, is computer monitored. You’ll see the initial results from the pressure test that show the extent of air loss. And then you’ll see how much is lost after the treatment. The difference is usually dramatic.

We’ll provide you with a certificate of completion that contains a before-and-after summary of duct leaks. You’ll see the total CFM of leakage and how that would compare to a single hole in the ductwork. For example, a total loss of 254 CFM is the equivalent of a 48-inch hole in the ductwork. And you’ll also see how the improvement in your system translates to better HVAC efficiency.

No ductwork is 100 percent leak-free. The average home has numerous gaps throughout the network. Each one on its own might be small and insignificant. But collectively, these leaks can equal big losses.

Aeroseal makes ductwork sealing faster, easier and much more effective. It approaches the problem differently. Instead of a technician investigating the ducts and sealing whatever is found, this material is naturally attracted to every leak, no matter where it exists. Even if there’s a tiny leak in the farthest reaches of your attic, Aeroseal will find and seal it.

If your utility bills are oddly high and your home isn’t as comfortable as it should be, chances are you have leaks in the ductwork. Rodenhiser is the HVAC professionals that Massachusetts homeowners have relied on for generations. Contact us for Aeroseal HVAC service today, and see a dramatic improvement next month and all year long.

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The Symptoms of Leaky Ductwork

Leaky ductwork
A sealed-up system works better and saves you money.

Leaks in your ductwork cost money, stress your air conditioner and can even lead to allergy flares. The network of air passageways that runs through your home isn’t exactly an aesthetic feature, either. It’s hidden inside walls, crawlspaces, and attics. So unlike a plumbing leak that leaves a trail of water, a duct leak might go unnoticed for years.

But there are clues if you know where to look, and there’s a solution that’s simpler than you might think. If you live with one or more of these problems, it’s probably time for an inspection.

#1: You’re Paying Higher Energy Bills

Temperatures are brutal this summer, both in Massachusetts and nationwide. But it’s always difficult to know if it’s the weather or a problem with your HVAC system that’s responsible for higher energy bills. Either one (or both) might be to blame.

Leaks in the ductwork allow part of your conditioned air to escape into places you’d never intentionally cool, such as the attic and between walls. The U.S. Department of Energy says that in many homes, the loss is about 30 percent. Leaks can also allow heat from those spaces to infiltrate the ducts and warm up the air that your AC system worked so hard to cool. Warm air naturally transfers to cooler spots when there’s nothing in place to stop it.

#2: You’ve Got Hot and Cold Spots

Most homes have spots that are harder to cool than others. Rooms on upper floors and those with large windows or inadequate insulation can all take on excess heat. And you might also have spots that are too cold. But when those problems can’t be traced to an obvious culprit, leaky ducts might be behind it.

With leaks, some of your cool air never makes it to its destination. That creates hot spots. Then if you lower the thermostat to compensate, other parts of your home might be too cold. If hot spots happen near your registers, you’ve probably got a leak.

#3: Your Air Filter Gets Dirty Faster

Most homeowners change the HVAC air filter every 1-3 months. It depends on factors such as whether or not you have pets and whether it’s pollen season. More particles in the air clog up the filter faster. However, leaks in the ductwork can dirty the filter more quickly.

Ducts run through unfinished parts of your home, and those areas are highly dust-prone. All that it takes is a small leak to allow dust inside, where it’s then sent out through the registers. From there, the system’s air intake draws in the particles and the filter traps them. If your home looks a bit dustier and your filter needs frequent changing, a duct leak might be behind it.

Leaky ductwork
If you have to do this, there’s a problem.

#4: The Airflow is Noticeably Lower

Air should flow out through every register in your home at about the same rate. You might notice some differences, as registers closer to the system often have a bit more airflow than those at the end of the run. But it shouldn’t be dramatic.

Comparably low airflow through one or more registers is one of the simplest ways to suss out leaky ducts. Unfortunately, some homeowners live with the problem for years, believing that it’s a normal hazard of a forced-air system. That’s usually not the case.

Duct leaks are like little thieves that abscond with your family’s money and comfort. And for years, sealing up those leaks was a challenging, invasive and costly job. But there’s a newer technology called Aeroseal that’s effective, efficient and affordable.

Instead of fixing leaks from the outside using messy mastic and tape, Aeroseal works from the inside. The best part is that it finds and seals leaks in hard-to-reach areas and those that are so small that the human eye wouldn’t spot them. It’s a simple solution to a complicated problem.

Rodenhiser specializes in duct inspection and sealing. For over 85 years, we’ve provided excellent service to homeowners in Framingham, Concord and throughout the route 495 / 128 area. Call Rodenhiser today, and we’ll seal your leaky system for good.

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Duct Sealing Benefits HVAC System Efficiency, Even in the Heat of Summer

duct sealing benefitsAlthough seasonal maintenance on your air conditioning or other cooling systems is important, some guidelines remain the same whether it’s chilly winter, humid summer, or mild spring and autumn. In particular, maintaining your home’s ductwork is essential to keeping your home comfortable. At the same time, duct sealing will also raise energy efficiency and lower utility bills. Read More Duct Sealing Benefits HVAC System Efficiency, Even in the Heat of Summer >>

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Having Ductwork Sealed? How Your Trusted HVAC Tech Tackles the Task

ductworkLeaky ductwork may be sapping warmth from your home this winter while running up your heating bills. A typical home might lose as much as 30 percent of its heated air (and cooled air in the summer) from leaking ducts before it reaches rooms in the house. Since most houses are built with ducts hidden in walls, attics and crawlspaces, inspecting and sealing ductwork is a job that is better left to a professional HVAC contractor. Here are some of the things your HVAC technician will do to ensure that your ductwork delivers conditioned air where it’s needed: Read More Having Ductwork Sealed? How Your Trusted HVAC Tech Tackles the Task >>

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Duct Sealing: What To Expect If You Hire A Contractor To Do The Job

duct sealing, Boston, MassachusettsIf your utility bills seem higher than normal, yet you’re left with stuffy rooms or excessive dust in your home, the ductwork could be to blame. Hiring a professional to complete duct sealing can provide you with a number of lasting benefits. Read More Duct Sealing: What To Expect If You Hire A Contractor To Do The Job >>

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Duct Sealing Keeps the Cool Air Coming When Summer Swelters

duct sealing, wayland, massachusettsEven if you’ve just upgraded to a highly efficient A/C system, it may come up short if your ducting system isn’t functioning properly. Duct sealing is a great way to keep your home temperate and your A/C functioning the way it should. Read More Duct Sealing Keeps the Cool Air Coming When Summer Swelters >>

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You’re Sealing Your Ductwork? So What Products Are You Using?

sealing your ductwork, Boston, MassachusettsDuct systems are notorious energy wasters. Sealing your ductwork often presents the best solution. Read More You’re Sealing Your Ductwork? So What Products Are You Using? >>

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Home Comfort Essential: Winterize Your Home

winterize your home, Boston, MassachusettsBefore cooler weather arrives, you’re wise to get your home systems ready for action. You can winterize your home by cleaning your gutters to allow snow melt to drain freely, and heading to your local hardware store to get door stops to fix those pesky drafts. But there are other energy-saving projects you should perform each fall to ensure that your heating system can function efficiently, and energy bills remain low. Read More Home Comfort Essential: Winterize Your Home >>

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If You Have Air Leaks In Your Home, You’re Wasting Money

air leaks in your home, Boston, MassachusettsThe air leaks in your home may seem like a charming nuisance; you may notice them as you walk by a door or window and think, “Well, no home is perfect.”

But truth be told, those air leaks are costing you serious money, so finding and fixing all of them in your Massachusetts-area home will reduce your home’s carbon footprint while saving money on your energy bill. Read More If You Have Air Leaks In Your Home, You’re Wasting Money >>

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Duct Sealing Steps That Can Net Higher Energy Savings

duct sealing, Boston, MassachusettsHave you looked at your ducts lately? Chances are, you most likely have not. Ducts are supposed to be installed and stay put — forgotten. That’s true. But, if your Massachusetts home has rooms that never seem to get warm or cool enough, are always stuffy or your heating and cooling bills are higher than you think they should be, it may signal a problem with your ducts. Read More Duct Sealing Steps That Can Net Higher Energy Savings >>

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