The Potential for Heat Loss

According to HomeSaver, Inc., you can easily cut heat loss from your home and reduce your heating bills. One way that you can achieve those goals is by installing an energy-saving top seal damper for your fireplace. The energy-saving damper replaces your fireplace’s original damper and is installed at the top of the chimney.

A fireplace and chimney are essential to the American home. But many chimneys are not completely or even adequately sealed to keep outside air from penetrating through the flue. This may cause heat loss for a home. In accordance with the laws of physics, warm air is much more likely to rise up and escape through a leaky chimney damper than to go out a window or some other opening. That loss can result in unnecessarily costly heating bills. Not to mention, your fireplace won’t be as effective at keeping you warm as you would hope!

A test performed in 2001 by Architectural Testing – an independent science lab in Minnesota – indicated that an energy-saving damper to the top of a chimney can reduce heat loss by more than 75 percent. Most fireplaces have a 13″ x 13″ chimney, which means that, if your damper is leaky or non-existent, you have the equivalent of an open window in your house!

Installing a Top Seal Damper

Many people don’t realize how much money is going up their chimney. Installing a top seal damper is a simple home improvement that can go a long way toward keeping your home warm.

While a majority of chimneys generally contain an internal metal damper, these products are often inadequate at restricting the flow of air between a home and the outdoors. They were never made to be tightly fitting. These dampers, called throat dampers, have a metal-to-metal closure that can leave gaps, allowing warm air to escape and cold air to enter. Over time, the metal structure of the throat damper can also warp or rust, causing leaks to grow.

The most frequently installed energy saving dampers in the country are Lyemance, Lock-Top, and Chimalator, two of which are manufactured by HomeSaver. Lyemance and Lock-Top seal the chimney with a silicone rubber gasket. And what is best of all- they seal the chimney at the top instead of the bottom, preventing cold air from coming down to the home level! They are activated from the bottom of the fireplace using a stainless steel connector wire to the spring-loaded damper assembly installed on the top of the chimney 20 feet up.

Both of the HomeSaver dampers carry a lifetime warranty and are made of solid cast aluminum and stainless steel parts assembled to precise standards.

The Lock-Top Damper

A Lock-Top damper essentially serves as a cap for the chimney’s top, while a Lyemance damper seals the chimney shut like a door. Both dampers are operated by the homeowner at the fireplace and are only available through chimney and hearth professionals. These specialists can ensure proper sizing and installation, thereby ensuring the life and safety of the equipment.

The installation of an energy-saving top seal damper can save a household hundreds of dollars each year. That’s money in the bank for our customers!

In addition to the energy savings, a damper benefits you by protecting your chimney from the elements. The corrosive effects of water from rain and snow can destroy a chimney over time; deterioration happens to the bricks and the mortar joints, as well as the firebox. But energy-saving dampers mitigate the weather risk. They can also prevent odors from entering the home, and they serve as a barrier to keep raccoons, squirrels, birds, and other creatures from residing within the chimney.

Call the scheduling center of Midtown Chimney Sweeps today to get a quote, or click here!

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Happy Customers

Midtown Chimney Sweeps is rated 4.9/5.0

Excellent
Midtown Chimney Sweeps4.9
Based on 2222 reviews
Emily Barnes
1 day ago
Stephen was professional, knowledgeable, and my fireplace has never looked better.
Jesica Marican
4 days ago
Nice guys! Met them at the Denver Home and Garden Show. They sell fireplaces and wood, stoves, gas, stoves, pellet, stoves, and electric fireplaces!
Tyler Rivera
4 days ago
Byron and Steven - met these guys at the Denver home show. Really good guys, awesome product, great service.
Scott Greenleaf
6 days ago
Byron is honest and was very helpful!
Response from the owner:Thank you Scott, We appreciate your review of our chimney and fireplace business in the greater Boulder and Denver Colorado area! Helping real customer like you with real services is our favorite!
-Byron and the Midtown Chimney Team
JS
2 weeks ago
Eric Lomas
3 weeks ago
Mike and Alice are very personable and have been super helpful every step of the way. My wife and I were looking to upgrade a faulty, unusable gas fireplace in our family room and, with great guidance from Mike and Alice, we picked a wood burning stove insert from Regency. Mike has come by multiple times to make sure we are comfortable with its use and has had great tips and tricks for getting the most out of our fireplace. We are very happy with the work and the service we have received. I highly recommend working with them! They give you quality work and stand by it.
Chris Shepard
3 weeks ago
Great company to work with. Extremely knowledgeable, helpful and did tremendous work on our chimney and chase cover.
Response from the owner:Thank you very much Chris for your review of our wood stove and chimney chase installation process!
- Byron at Midtown Chimney
Marcus Hill
4 weeks ago
Mike was the best, he did a great job. Honest and straightforward guy, will be working with them going forward!
Keelin Glennon
1 month ago
Byron is a nice sales person!
Terrance Savill
1 month ago
These guy are the best to work with Kurt! We’ve been collaborating together with our stone mantels to quite awhile now and will always recommend. Their inspection and sweeping services are second to none. We’re more than happy to refer them to them in the Hillsborough, New Brunswick, and Edison area.
These guys replaced our chimney liner a few years ago. 5 star review for their services.
⭐⭐⭐⭐⭐
I couldn’t be more pleased with the outstanding job done by Midtown Chimney Sweeps. From start to finish, the entire experience was professional, organized, and truly customer-focused.
Jody and Christopher were absolutely exceptional. They were prompt, punctual, and extremely professional—while also being personable and easy to communicate with. From the moment they arrived, they treated my home and personal space with complete respect. Before any work began, they carefully prepped the area, covering floors, rugs, furniture, and the entire workspace to ensure everything was fully protected. Their attention to cleanliness and detail immediately gave me confidence.
The project took place over two days, and throughout that time they remained focused, diligent, and hardworking. They kept me informed every step of the way, clearly explaining what they were doing and what to expect next. Their proactive, customer-first communication style made the entire process smooth and stress-free. I always felt up to date and fully aware of the work being performed.
Even though chimney cleaning and repair can naturally involve dust, noise, and odors, Jody and Christopher went above and beyond to be as minimally intrusive as possible while still working efficiently and effectively. They created a work environment that felt organized and controlled, and I was completely comfortable having them in my home. In fact, I felt at ease stepping away and going about my day with total peace of mind, knowing the job was in capable hands.
When the project was completed, they didn’t just pack up and leave—they carefully cleaned, vacuumed, and ensured everything was left spotless. Their craftsmanship, expertise, and pride in their work were evident in the superior final result. The repair and cleaning were done to an exceptional standard, and the finished product exceeded my expectations.
If you’re looking for reliability, punctuality, professionalism, outstanding attention to detail, and true craftsmanship, I highly recommend Midtown Chimney Sweeps—especially Jody and Christopher. I am extremely happy with the service and wouldn’t hesitate to use them again.
Response from the owner:Patrick thank you so much for the kind words about our chimney and fireplace restoration repair technicians Christopher and Jody at Midtown Chimney Sweeps Fireplace store in Boulder!

Chris and Jody are both second generation technicians in masonry and Sheet Metal and I couldn't have a better duo.

- Byron, Midtown chimney

Lisa Guignard
1 month ago
Kurt took our fireplace from totally unusable .. to a wonderful working fireplace. He is a master at his job. A true craftsman. Our home is over 100 years old. We bought the home because we wanted a fireplace. However whenever we lit a fire, even a duralog. Our home was filled with a smoke smell. Kurt restored our fireplace to perfection. He is always there for you. Answers any questions. You cant find any person more qualified than him
Response from the owner:Thank you so much, Lisa, for your wonderful review! We're thrilled to hear that Kurt was able to transform your fireplace into a beautiful, functional centerpiece for your home. It's always our goal to provide expert service and ensure our customers are completely satisfied. If you have any more questions or need assistance in the future, we're here to help!
bbgmamma
1 month ago
Excellent job. My chimney had creosote build up which affected my ability to burn cleanly. Derek cleaned and inspected everything and was able to clear the stack so I can use my wood stove again without sooting. Very grateful! Highly recommend.
Iris Giger
1 month ago
The technician was right on time and did a clean and thorough inspection and job with our gas fireplace. I only can recommend these guys.
Response from the owner:Thank you so much, Iris, for your wonderful review! We're thrilled to hear that our technician provided you with timely and thorough service. Your recommendation means a lot to us, and we're grateful for your support. If you ever need assistance in the future, we're here to help!
Chris Taylor
1 month ago
Excellent job by Marcus. Very friendly, great service. Highly recommend!
Lillian Chapin
1 month ago
Byron and his team were extremely helpful when I discovered some serious fireplace problems when I moved into my home. He took the time to educate, listen, and fix my fireplace quickly!
Response from the owner:Thank you for the kind words about or chimney and fireplace repair services in Evergreen Colorado!
-Byron and the Midtown Chimney Team
Christopher Anhut
2 months ago
We have lived in a 250 year old dutch farmhouse for the last 26 years. One of the fireplaces was so poorly reconstructed, most likely from the 50-60's that we could never use the fireplace. I called Kurt at Midtown and he suggested a wood-burning insert stove . He suggested a contractor to help with closing-in the fireplace hearth so that it seamlessly would receive the wood stove. They had to be pretty creative in how to make this work, and were really patient and focused on getting the best look possible for the age of the house.
In the first month after having the wood burning insert installed, we have used it at least 20 times. Its super easy to fire, draws great, and warms the room fantastically. My wife is thrilled... which is saying something! Nice work Midtown Chimney. We couldn't be happier.
Response from the owner:Thank you so much, Christopher, for sharing your wonderful experience with us! We're thrilled to hear that the wood-burning insert stove has brought new life to your historic farmhouse and that your wife is delighted with the results. It's fantastic to know that Kurt and the team could provide a solution that fits seamlessly with your home's character. We truly appreciate your kind words and are here whenever you need us!
MICHELLE SAK
2 months ago
Mike did a great job repairing shoddy work done by another vendor before him. After finding switches on 3 of my propane fireplaces had their safety wires removed he went about repairing and bringing all of them up to code and working order. Everything works great now. Thank you!
Response from the owner:Thank you so much, Michelle, for your wonderful feedback! We're thrilled to hear that Mike was able to repair and bring your fireplaces up to code. It's great to know everything is working perfectly now. We appreciate your trust in us and look forward to serving you again in the future!
Sarah Cassella
2 months ago
Cannot more highly recommend Daniel - honest and trustworthy vendors are very hard to find and we will absolutely call upon him again should we have any issues.
Response from the owner:Thank you so much, Sarah, for your wonderful review! We're thrilled to hear that Daniel provided you with such a positive experience. Honest and trustworthy service is what we strive for, and it's great to know we met your expectations. We look forward to assisting you again in the future!
Coryn Nelson
2 months ago
I can not begin to tell you how happy we have been with Stephen! I'm a denver designer and he has helped me on a few projects now. His attention to detail and wanting whats best for the customer is top notch! I recently had a client who had 3 fireplace professional out and all of them said they needed to replace the whole unit. Stephan cam ein and fixed it in a matter of 2 days and saved them so much money! 10 out of 10
Josh Greenberg
2 months ago
We have had Levi twice now. The first year Levi came and did an amazing job not only for me, but my father as well. Levi is timely, professional, but my favorite personable. The other thing about MTCS is their website works and the phone staff is great as well. Levi just cleaned our Kuma wood stove for this year and once again showed up prompt with a friendly personality. He got right to work and did another fantastic job. Lastly, MTCS and Levi not only does a fantastic job, but their pricing will beat the pants off of anyone in our area. Thank you Levi and MTCS for being phenomenal at what you do.
Response from the owner:Thank you so much, Josh, for your wonderful review! We're thrilled to hear that Levi has consistently provided you and your father with excellent service. It's great to know that our website and phone staff have also met your expectations. We truly appreciate your kind words and look forward to serving you again in the future!
Stephen Carter
2 months ago
Byron is the best! Beau serviced my freestanding gas stove for the 1st time in 12 years. He did diagnose a bit of a faulty pilot assembly. After replacing the pilot assembly there were some issues with the flame pulling off the thermocouple resulting with the stove refusing to stay burning for longer than 1 minute. After trying several fixes while consulting with Byron and even the Quadrafire techs the problem still remained. Byron came out personally a couple of days later and fixed the problem in less than 10 minutes. His experience really came through for us.
Beau and Byron will certainly to service our gas stove as well as our wood burner that Byron actually installed about 15 years ago.
Don't hesitate to call Mid Town for your fireplace and stove services.
Response from the owner:Thank you for your five-star review of our gas fireplace and gas stove repair and diagnosis business in the Evergreen and Conifer and Bailey area!
- Byron and the Midtown Chimney team
William Binns
3 months ago
Phenomenal work done while also being quick and clean. Definitely recommend these guys for you for any fireplace or chimney needs
Rachel Appel
3 months ago
Byron and crew are fantastic. We’ve always had good experiences with Midtown Chimney and plan to use their services ongoing. Grateful for their friendliness and professionalism!
Response from the owner:Woohoo thank you!
Rachel it has been a pleasure serving you and your husband all these years, fixing the wood stove and sweeping the chimney. We appreciate you!
-Byron and the Midtown Chimney and Firepalce Store Team of Boulder

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