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Since 1986 -
Complete Comfort!We are Dependable & Trustworthy!
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Tune-Up Special $791ST HVAC SYSTEM -
HVAC System Installs & Replacements -
Need Appointment?CONTACT D. MCKEON TODAY!
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.
Google Rating
4.9 
Michael Boucher
19:16 07 Nov 19
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.
H Lacour
18:21 24 Oct 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.
Marie Hogan
16:01 18 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
Michelle Yeager
15:25 01 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!
Casey Patrick
19:14 18 Sep 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!
Gof Abbey
12:19 03 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.
Bruce Dalrymple
20:13 23 Aug 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.
Melinda McNeeley
19:35 21 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!
Mark Ryan
18:27 14 Aug 19
The team at D. McKeon is excellent - top notch in all areas of Sales & Specifications, Installation, and Service.
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
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!!
Christy Songster
20:51 23 Jul 19
Preston, our technician, was prompt, professional and thorough. We highly recommend using this company!
William Hennessy
16:04 22 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
21:31 20 Jul 19
Wanted to give the neighborhood HVAC company a try by calling Mckeon July 9th for no cool call with an immediate response and wonderful office staff who updated me along the way; professional and personable tech arrived to state he cannot turn off electricity to outdoor condenser unit which is necessary for a safe and thorough inspection to determine what could be the issue. After providing full access to the home and clearly stating every electrical breaker can be turned off without fear of upsetting us just in case one might be mislabeled (all are labeled correctly), the tech who ‘has not seen anything like this in 19 years’ never turned off all the breakers and because of this continued to receive electricity at the unit prohibiting the inspection. I asked multiple times if we needed an electrician to help and I even took off the interior electrical panel cover to help trace the power lines and the tech finally stated we should call an electrician to figure out why the unit still has a charge with the disconnect out and ‘the breakers off’. Charged $85 for the inspection that was not able to be performed, apologized for leaving us without air but nothing he could do until electrical situation is resolved. HERE is the reason for my review, electrician (third-party and unknown to me) arrives several hours after I give brief reason for the call and make it clear I need to know if the HVAC tech has made a simple mistake, or there is truly a bigger issue; HVAC disconnect box is replaced due to age and was able to be serviced by TURNING OFF THE BREAKERS and HVAC tech wasted our time, money and trust. Entire indoor and outdoor HVAC was replaced a week later by the electricians referral. Cannot consciously recommend this company after contacting the office to state the facts and being told their tech would never make such a simple mistake.Short Version: Mckeon HVAC tech, although professional and kind, was not thorough or versed enough in regards to disconnecting electricity to outdoor unit and no inspection was performed; electrician arrives to explain nothing out of the ordinary and referred separate HVAC contractor who replaced both inside and outside equipment a week later
Dan Lightner
13:30 07 Jun 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.
Roy Adkins
12:53 27 May 19
First they gave me three estimates that the lowest was $11k. Then the next one was $8. Then the last one after they took all the warranties out was $7 and that was after almost a week back and forth negotiations. Finally fed up with McKean, I called a newer company in they area, they actually checked out my system for free, and their quote was under $5k full warranties included.
Ruben Munive
21:15 03 May 19
Did good work but was to expensive. Paid $267 to get a part that costs $40 replaced in 30 minutes.
Donna Frankovsky
15:08 07 Feb 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.
Michael Hughes
14:35 28 Aug 18
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.
Barbara Bowker
14:52 27 Jun 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.
John Baldwin
19:41 06 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.
Sheila Rose
14:33 30 May 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.
paulette martin
16:01 15 Jan 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.
Facebook Rating
4.6 Brian Babyak
2019-05-30T00:38:10+0000
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.
Mike Morris
2018-11-20T22:41:26+0000
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!
Reggie Martin
2018-10-13T03:24:40+0000
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.
Sheri Beth Wimberly-Scovil
2018-01-02T18:16:14+0000
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!
Mary Ann Fogarty Beckwith
2017-10-19T19:54:33+0000
I have used McKeon for over 15 years and they are very reliable and have always given me great service.
Reggie Martin
2017-05-04T00:15:20+0000
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.
Beth Hilgert Liotta
2016-09-08T16:22:25+0000
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.
Sue Loftus McBride
2016-07-19T19:30:22+0000
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!
Rita Neitzel Tafelski
2016-06-19T15:40:55+0000
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!
Michele L Smith
2015-08-25T13:05:54+0000
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!
Ann Beverly
2015-01-06T00:15:43+0000
BIG RIP OFF YOU CHARGE 175.00 FOR SOMETHING I COULD HAVE BOUGHT MYSELF FOR LESS THAN 30.00 WHAT A WAY TO RIP PEOPLE OFF WILL NEVER USE THIS COMPANY AGAIN FIRST AND LAST TIME FOR ME
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Heating & AC Repairs
We repair all makes and models of heating & air conditioning systems.
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
2019-05-30T00:38:10+0000
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
2018-11-20T22:41:26+0000
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
2018-10-13T03:24:40+0000
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
2018-01-02T18:16:14+0000
I have used McKeon for over 15 years and they are very reliable and have always given me great service.
Mary Ann Fogarty Beckwith
2017-10-19T19:54:33+0000
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
2017-05-04T00:15:20+0000
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
2016-09-08T16:22:25+0000
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
2016-07-19T19:30:22+0000
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
2016-06-19T15:40:55+0000
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
2015-08-25T13:05:54+0000
Heather Benedict Harris
2013-08-15T18:30:06+0000
Tracey Floyd Viars
2013-07-16T13:30:52+0000
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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
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
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Our Recent Advice Articles
Do I need a Heat Pump?
Heat Pump –Kennesaw, GA It’s November in Kennesaw, Georgia and as Turkey Day, quickly approaches and the pigskin is on the platter ensure your home comfort with a Bryant Evolution heat pump system from D. McKeon Heating and Air. D. McKeon Heating and Air is your Bryant factory authorized dealer and your Kennesaw, Georgia heating…
Do you need a new Gas Furnace?
Gas Furnaces –Kennesaw, GA It’s October in Kennesaw, Georgia and this Halloween D McKeon Heating and Air wants to banish those scary chilly nights with a new Evolution gas furnace from Bryant. D. McKeon Heating and Air is your local Bryant team dealer. If your current heating system exceeds 10 years in age, is constantly…
Benefits of an HVAC Ultraviolet Light
Ultraviolet Lights –Kennesaw, GA September is here! As you get ready for the long Labor Day weekend, D. McKeon Heating and Air wants to protect your indoor air quality with ultraviolet lights for your HVAC system. Ultraviolet lights are a necessity in Kennesaw Georgia with the constant humidity and also the damp dark ductwork makes…
Licensed and Certified
Our satisfied customers:
0McKeon H&A is reliable, dependable and honest!
— R.K., Kennesaw
1Outstanding in every way!
— T.H., Acworth
2Your company always has responded in a timely manner and has been fantastic!
— J.B., Kennesaw
3Very happy with entire project!
— H.R., Kennesaw
4We could not be more pleased! Thank you to Dennis and all his team!
— GC., Marietta
5Great service and great people!
— P.M., Powder Springs
