Heating & Air Conditioning Services in Cobb County, South Cherokee County, and East Paulding County including Kennesaw, Acworth, East Cobb, Marietta, Woodstock, & surrounding cities.

HVAC Excellence since 1986

D. McKeon Heating and Air Conditioning has been the most trusted heating & AC company since 1986. We’re a family-owned and operated company that is fully licensed, insured, and certified.

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Heating & AC Repairs

We repair all makes and models of heating & air conditioning systems.

Heating & AC Maintenance

Preventative maintenance can help save you money.

HVAC Installations

We are a Bryant Factory Authorized Dealer!

Financing Options

Our Recent Facebook Reviews

Thanks for the quick turnaround and getting my AC back up and running. I’mA customer for life! I highly suggest calling Mckeon for HVAC needs.
Brian Babyak
Our 28-year-old furnace finally gave up the ghost last week, and we were amazed by the quick work that D. McKeon made of the new furnace installation. I called them at about 2 p.m. on Thursday and they had a technician at my house checking the old unit by 3:30, and installed the new Bryant furnace the first thing Friday morning. Now THAT'S what I call service!
Mike Morris
The professionalism of D McKeown heating and air is unquestionable. After making a decision to use this service company a year ago I have never been disappointed in their customer service. If you are shopping around for an HVAC company, I don’t think you could possibly not consider using D McKeon.
Reggie Martin
Fantastic company! Our for ace dies New Year's Eve a d we already habe a replacemet. Clean, kind and cost effective. Will used for all our future needs!
Sheri Beth Wimberly-Scovil
I have used McKeon for over 15 years and they are very reliable and have always given me great service.
Mary Ann Fogarty Beckwith
It was refreshing to find a company that actually seemed to care about customers. DMcKeon and staff are very professional and got the job done on time, on schedule and at the price they had quoted. I had a home warranty company contract that was cancelled immediately after seeing what honest service felt like. I highly recommend their services.
Reggie Martin
Excellent service and people that really care. I have used D. McKeon for over 20 years now. My 16 year old air conditioner was on its last leg and they installed a new one for me as soon as possible. I will always recommend Dennis and his staff. Thanks to all for helping me out. You are the best.
Beth Hilgert Liotta
Always excellent service and reliable! Thank you for coming out last week, after hours, to make sure our A/C got fixed right away and we wouldn't have to suffer in the heat!
Sue Loftus McBride
Excellent company that gives personalized care. They go above and beyond when you have an issue rather than run like some companies. We bought 2 units from them and had unfortunate issue with install of one causing leak and damage. Bob and staff went beyond to get everything back to normal as fast as possible. Mr. Mckeon even came to our home himself for initial consult and was incredibly nice and attentive. To top it off, when they learned we were Cubs fans, they went out of their way to get us great seats to the CUBS vs BRAVES game! Special thanks to Mr. Mckeon and Bob for these tickets!! It made a great family memory for us!. The entire staff makes you feel like family!
Rita Neitzel Tafelski
I love the staff at D. McKeon Heating & Air. They are all very caring and are truly interested in doing what's best for the customer! I highly recommend the McKeon team!
Michele L Smith
Heather Benedict Harris
Tracey Floyd Viars

Why Choose Us?

Serving homeowners & business since 1986. We are the team to trust!

24 hour emergency services

trustworthy team

highly rated company

free replacement estimates

highly trained technicians

33 years in business

family owned and operated

drug tested employees

Our Recent Google Reviews

My initial introduction to this great company was with Bob who did my quote for me. Bob is not only extremely helpful and knowledgeable, but he is friendly and very easy to talk to. They were able to schedule me when I needed, which was right away. The installers were the bonus here. Jacob is a highly trained and skilled professional. I am positive this company sees the value in their best employees as they have been there a long time and speak very highly of it themselves. Thank you Bob, Jacob and team for doing such a great job. We will never use another company!!
Julie R.
00:31 31 Jan 20
It hit 27° and of course our heat went out leaving us in a 55° and dropping house. I called D. McKeon because they had 5 stars (which we now know why) and were really close to us in Kennesaw. They were able to get to us within an hour and the technician who came out was quick and informative. He talked us through everything he found gave us helpful suggestions and had the heat back on in a matter of maybe 30 min. After he left my husband said that they would be the people we use from now on. (You don't know my husband but he is VERY hard to impress!) So this was very high praise. We both felt more knowledgeable and informed about our unit and what direction to take in the future. Thank you so much D. Mckeon!
Brittany Crawford
18:05 21 Jan 20
Great service! We have a maintenance contract with them and we truly appreciate the very detailed service. Preston is the best!
Kimberly Yowell
18:39 15 Jan 20
Very courteous and accommodating when scheduling appointments. Service is top notch, thorough and on time. Service provided by Preston is fantastic. No question is too basic as he takes the time to answer questions and point out options. We use them for annual furnace and air conditioning checks as well as ac repair about a year ago. Excellent and I’m sure you’ll be happy if you go with them.
Michael Boucher
19:16 07 Nov 19
After a horrible experience with Reliable Heating and Air (which left us without air conditioning for 5 days during 90° weather) we called D McKeon and had a new unit in less than 24 hours. The customer service provided by Crystal was helpful, calming and knowledgable. Kevin and Bob were amazing in getting the new unit installed right away. Pricing was also a noticeable amount lower than Reliable and we weren't pressured into replacing a working furnace. It's been about a month since our new unit was installed and I'm still so grateful for the care they provided. We are now lifetime customers of McKeon.
H Lacour
18:21 24 Oct 19
Preston was here this week and everything checked out just fine. I have appreciated your service since day one and your employees are the reason why. Thank you and see you next time, Marie
Marie Hogan
16:01 18 Oct 19
Fantastic, fast, trustworthy service! We use them for our home and business. Love the office and the technicians... everyone is knowledgeable and helpful!
Michelle Yeager
15:25 01 Oct 19
Great service and very professional staff! Service tech was in & out in 30 mins with an efficient fix and courteous explanation. Not only that, he helped adjust my programmable thermostat to be more efficient for us. Highly recommend D. McKeon!
Casey Patrick
19:14 18 Sep 19
We had used this company several times for repairs so it was a "no brainer" when we were looking for regular service. Always available without upping prices when last minute disasters hit and work with you for earliest possible service date. The fact that they are "just around the corner" helps as well.
Gof Abbey
12:19 03 Sep 19
Been using D. McKeon Heating and AC Service for nearly 30 years. Not once have I had a problem. Service is always complete and all questions are answered. My latest technician (Preston) is absolutely the best. And the Office Lady (Crystal) is exceedingly pleasant. I personally highly recommend this company for your HVAC needs.
Bruce Dalrymple
20:13 23 Aug 19
All of the staff at D. McKeon have been very helpful, professional and knowledgeable from the customer service representative, to the service tech and the installation crew. We have had our new heating and AC system for 1 year now and we are very pleased with the results and comfort of the system. We were skeptical about paying the extra money for the upgraded system but, it has made a tremendous difference! With the humidity control system, you would never know that we are in the “dog days of summer” from inside our house. If anyone is riding the fence on whether or not to buy the Bryant Evolution System , it is worth it!
Melinda McNeeley
19:35 21 Aug 19
Professional and on time! Reasonable rates and great service!
Lynn Vanderhoff
15:38 19 Aug 19
The team at D. McKeon is excellent - top notch in all areas of Sales & Specifications, Installation, and Service.
Mark Ryan
18:27 14 Aug 19
Excellent service! Personnel are very professional and efficient at their work!! I ask for Preston each service period as he takes his job very seriously, makes sure my systems are working properly and explains what work was done...I highly recommend this company for your h/ax needs!!
Georgann Toop
16:17 31 Jul 19
Excellent service! Personnel are very professional and efficient at their work!! I ask for Preston each service period as he takes his job very seriously, makes sure my systems are working properly and explains what work was done...I highly recommend this company for your h/ax needs!!
Georgann Toop
16:17 31 Jul 19
Preston, our technician, was prompt, professional and thorough. We highly recommend using this company!
Christy Songster
20:51 23 Jul 19
After an apparent misunderstanding, Mckeon agreed to refund our service charge and has proven their loyalty and dedication as a customer based establishment and I can continue to recommend their services as a leading HVAC company in our Atlanta market!
William Hennessy
16:04 22 Jul 19
I have been a loyal D, McKeon customer for over 10 years as well as my sons. They deliver outstanding customer service and best of all really know their stuff. Bob, Preston, and the entire staff are fantastic. Highly recommended.
Dan Lightner
13:30 07 Jun 19
We have been customers for 20 years and would not use any other HVAC company. Their service and staff are top notch. Customers for life.
Donna Frankovsky
15:08 07 Feb 19
This company and its employees are true professionals. I found myself in a bad position with a cooling system failure August 2018 in Kennesaw. Under the guidance and leadership of Bob Best, they found me a prompt and affordable solution. They are highly recommended.
Michael Hughes
14:35 28 Aug 18
I have complete confidence in D. McKeon. They are completely honest, and I feel their advice is sound. They have helped me tremendously since I moved to Marietta, GA, three and a half years ago, and their technicians are wonderful and very thorough.
Barbara Bowker
14:52 27 Jun 18
I own a daycare center in Kennesaw, and can not say enough good things about D. McKeon's team. I have 5 units, and over the years I believe that I have had every service tech they have out to my center, and I have met all of the ladies in the office as well stopping by to make payments and different things. Every single person that I have met from there has been consistently helpful, informative and polite. Their prices have always been fair, and everyone from the top down has given honest advice and even steered me away from services that they offer and could have tacked on, that were not necessary. They have been really great with scheduling too, since we are a childcare facility. Again, I can not rate this company and their people highly enough. Even when I mentioned them at the parts store, the guys there have nothing but nice things to say about them. A good name is one of the hardest things in the world to keep and the easiest to lose, and they are doing a great job keeping their name in good standing.
John Baldwin
19:41 06 Jun 18
Great company! They installed a new heating & air system with professional service. They always serve you with the best of care to fit your needs.
Sheila Rose
14:33 30 May 18
I would recommend this company highly. I called because our furnace went out and within 3 hours they were there to diagnose the problem. I needed a new furnace (mine was over 30 years old) and they installed a new furnace the next day. Excellent service and would highly recommend you to choose them as your heating and air service people.
paulette martin
16:01 15 Jan 18

Our Recent Advice Articles

Do You Need a Wi-Fi Thermostat?

Wi-Fi Thermostat –Kennesaw, GA It’s February in Kennesaw, Georgia and this can only mean one thing….it’s time for the Super Bowl game and D. McKeon Heating and Air to install your Bryant Wi-Fi thermostat. That’s right D. McKeon Heating and Air is your Kennesaw, Georgia HVAC team. We have a great way to kick off…

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High-Efficiency Heating Systems

High-Efficiency Heating System –Kennesaw, GA January in Kennesaw, Georgia is full of new life, but if your heating system is constantly breaking down, needing repair, or just not able to keep up with your demand you need a Bryant high-efficiency heating system from D. McKeon Heating and Air. D. McKeon Heating and Air is Kennesaw,…

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Home Safety Products

Carbon Monoxide Monitoring and Smoke Detectors –Kennesaw, GA The countdown to Christmas has begun and D. McKeon Heating and Air wants to ensure your safety this season and all year through with a Bryant carbon monoxide detector and smoke detector. D. McKeon Heating and Air are your Kennesaw, Georgia Bryant heating, cooling, and indoor safety…

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Licensed and Certified

Our satisfied customers: