What is the difference between duct sealing and duct repair?

Duct sealing closes small gaps, cracks, and loose joints where air leaks out. Duct repair addresses larger problems like disconnected sections, crushed ducts, or torn flex duct. Many Dunwoody homes benefit from sealing, and a technician can tell you which service your ductwork needs.

How much can duct sealing save on energy bills?

The savings depend on how leaky your ductwork is. Homes with significant duct leaks can see a meaningful reduction in energy costs after sealing because the system doesn't have to run as long. A technician can assess the extent of the leaks in your Dunwoody home.

Can I seal my ducts myself?

You can seal accessible joints with mastic, but most ductwork in Dunwoody homes runs through attics and crawlspaces where access is tight. A professional has the tools and training to find and seal every leak throughout the system, including sections that are difficult to reach.

How long does duct sealing last?

Professional sealing with mastic or metal-backed tape holds up for years without deteriorating. Unlike standard duct tape, which dries out and peels away, proper sealant materials are designed to withstand the temperature swings in your Dunwoody home's attic and crawlspace.

Should I seal ducts before or after a renovation?

Ideally, duct sealing should be part of any renovation that opens up walls or ceilings in your Dunwoody home — it's much easier to access ductwork when the space is open. But duct sealing is beneficial at any time, whether you're renovating or not.

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Duct Sealing in Dunwoody, GA

One Hour Heating & Air Conditioning® of North Atlanta

Duct Sealing in Dunwoody, GA

Duct sealing in Dunwoody closes the gaps and cracks in your ductwork that let conditioned air escape into unconditioned spaces. If your HVAC system runs frequently but some rooms never feel right, or your energy bills seem higher than they should be, unsealed ductwork is one of the most common and fixable causes.

Why Dunwoody Homes Need Duct Sealing

Many Dunwoody homes have been renovated, expanded, or updated over the years — and the ductwork has often been modified right along with them. Each time a room is added, a layout is changed, or equipment is replaced, new connections are made in the duct system. Over time, those connections can develop gaps, and original joints that were never properly sealed become bigger problems as duct tape dries out and falls off. Even homes that haven't been renovated develop duct leaks simply from age, settling, and the expansion and contraction caused by temperature changes. In Dunwoody's hot summers, every bit of cooled air that leaks into the attic is energy and comfort lost.

How Professional Duct Sealing Is Done

A technician inspects your entire accessible duct system to locate leaks at joints, connections, register boots, and transitions between duct materials. The leaks are sealed using mastic sealant or metal-backed tape — materials designed to last for years without breaking down. The technician works through every connection point where air can escape: the plenum, branch takeoffs, register connections, and anywhere flex duct meets rigid duct. After sealing, the technician verifies improved airflow. For Dunwoody homes with ductwork running through a hot attic, sealing the return-side leaks is especially important — those gaps pull hot attic air into the system and mix it with your conditioned air.

Benefits of Duct Sealing for Your Dunwoody Home

Sealed ductwork means more of your conditioned air reaches the rooms where you live. That translates to more even temperatures throughout the house, shorter run times for your HVAC system, and lower energy bills. Rooms that were always too hot in summer or too cold in winter suddenly get the airflow they need. Duct sealing also improves indoor air quality by preventing dust, insulation fibers, and attic contaminants from being pulled into the air you breathe. For Dunwoody homeowners who have invested in a good HVAC system but aren't getting the performance they expected, duct sealing often makes the difference.

About Dunwoody

Dunwoody's active renovation market means many homes have had their interiors updated while the ductwork behind the walls and above the ceilings has gone untouched. It's common for a Dunwoody homeowner to invest in a beautiful kitchen remodel or bathroom upgrade only to find that the rooms still aren't comfortable because the ducts serving them are leaking. Addressing ductwork as part of any home improvement project — or as a standalone upgrade — ensures that the rest of your HVAC investment performs the way it should.

Serving Dunwoody and Surrounding Areas

Our duct sealing service covers Dunwoody and surrounding communities including Sandy Springs, Brookhaven, Chamblee, Doraville, Roswell, and Johns Creek. We serve homeowners throughout the Perimeter area and North Atlanta.

Call (404) 689-4168 to schedule service.

Visit our office:

One Hour Heating & Air Conditioning
1360 Union Hill Rd Ste 5F, Alpharetta, GA 30004
(404) 689-4168
Open 24 hours

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Helen Albanese

in the last week

We had central AC added to our home 5 years ago. We decided to get an AC and furnace tune up before the summer. Matt, the technician from One Hour Heating and Air, was on time and polite. He pointed out that our furnace filter had not been changed since 2022. Big oversight by me. Matt explained how the air flows through the furnace and the direction the filter needs to be placed. I marked with a sharpie on the furnace an arrow so I would remember next time. Good piece of mind. Positive experience.

Justin Low

in the last week

I cannot recommend this HVAC company enough. The technician showed up exactly on time and was patient throughout the entire visit. They took the time to answer every single one of my questions thoroughly, making sure I felt completely comfortable with the process. What I appreciated most was their honesty—they gave me several clearly explained options for both repairing my current unit and replacing it. Best of all, they were not pushy and never once tried to upsell me on things I didn't need. It is rare to find such genuine, reliable, and pressure-free service these days. A 5-star experience from start to finish.

Paul Yi

in the last week

Best HVAC team in King County. Professional, reliable, and honest. Alex, the owner, takes great care of his customers. Highly recommend.

Denis

in the last week

I was initially skeptical of working with a franchise, but I was really impressed by how professional, helpful, and punctual their technician, Matthew, was throughout the visit. Pricing was reasonable and I will definitely be going with them for any future HVAC needs.

Max B

a week ago

Really good experience with One Hour. Alex was super communicative from the first call, got us on the schedule quickly and kept us in the loop the whole time. Marklus came out and handled the repair. Technically solid and left everything cleaner than he found it. Never felt pressured to buy anything extra which was refreshing.

vivek savsani

a week ago

We had our heating system stop working during the extreme snow storm, and this company responded quickly. Joe Bonness, who is an expert technician arrived on time, diagnosed the issue fast, and fixed it efficiently. He explained everything clearly and made sure the heat was working perfectly before leaving, even though it was late around midnight. We are very grateful for the quick and professional service during such freezing weather. Highly recommend their service!

Neha

a month ago

Huge thanks to my neighbor Chris for coming over late at night to fix my AC unit when it stopped working. I caught him and his family on the way out and told him my problem. He ended up leaving his plans early and took the time to figure it out and got it running again quickly. It meant a lot that he was willing to help out so late. He even gave me a few tips to look out for in case anything else happened. Super knowledgeable and a great neighbor to have! Give that guy a raise!!

Zaria Smith

a month ago

Tim was great. I can’t say enough good things. He came out to do a routine maintenance and unfortunately, I had to replace my furnace due to wear and tear. This happened on Friday, and he was at my house bright and early Monday to install the new furnace. He was pleasant the entire time, and very informative throughout. Thank you so much.

Sindel Garcia

a month ago

I will start by saying that KC was very professional explaining all aspects of the whole job that his team was going to do as far as to what we needed concerning a furnace rather we should repair or replace the existing furnace which by the way was 26 years old. Zo the service installer was quite thorough with the entire job, also Areej another technician did a spectacular job with cleaning all of the air ducts with detailing each step of the way up to and including the dryer vent as well a fantastic job was done. Although the job was extended one extra day was not a problem the problem came about when they informed us that they were going to return the next morning by 10am and by 11am we hadn't heard from them when a simple courtesy call with an eta would have gone a long way instead of me having to place a call to them. Overall the job was complete with a new furnace that was installed and the job was well done.p I would highly recommend One Hour Heating & Air Conditioning of Naperville.

Gerald Moody

a month ago

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