227 E. Deer Park Drive, Gaithersburg, Maryland 20877
Free Estimates
(877) 210-6812
About Us
Gac Car


Looking for an HVAC company in Maryland? At GAC Cooling & Heating, our customers give us the highest possible ratings in the leading consumer ratings guide for area service companies. Check out what our customers in your neighborhood have to say about their experiences with our HVAC company:

Heating & Air Conditioning Testimonials in Derwood, MD

The entire team is the best of any single company we deal with for our home. You show up on time, preform excellent work, correct any problems immediately and make me feel good about the entire process. I only wish you handled cable television and auto repairs too! Thanks for another great experience.
–Larry Price, Derwood

Your salesperson, Jason Moxley, was professional, knowledgeable, and informative. In addition, your price, product, and service were superior your competitor.

Your installation experts, Mike and Brian, did an outstanding job installing a new outdoor A/C unit and evaporator coil, running new tubing, and putting in new coolant. They were both highly professional, knowledgeable and courteous. Mike and Brian are a credit to your company and definitely instill confidence in our decision to have your company work in our home.
–Kevin J. Conway, Derwood

Thanks for employing such wonderful, knowledgeable and courteous people.
–S. Mathur, Derwood

Really impressed with the installation team – professional – courteous!
–Liz Arthur, Derwood

Our neighbor, Heather R., raved about your customer service, so when our AC went out, we called you first. We have been VERY impressed, and will recommend you!
–Debby Johnson, Derwood

We have been customers of your for about 13 years now and have been very happy with the service. Some years ago our furnace failed on a cold Dec. 24 and a technician came out to fix it around dinner time. We were SO impressed.
–Brian Belanger, Derwood

Crew members that did the installation were very careful about my home and extremely polite and kind.
-Margaret Barrett, Derwood

I’ve been a very happy customer for 12 years. I’ve always been pleased with your service.
-Arlene Antonicelli, Derwood

We have had excellent work from you before. We would like to say that the effort of your firm was superb. Both Shaun and Bill were professional and helpful and a great asset to your firm.
-Robert N. Marshall, Derwood

Apparent good knowledge of equipment options available and the real differences between them; Apparent good knowledge of heating and cooling system characteristics and performance; A professional approach to preparing the estimate and an awareness of the need to perform this inherently messy work without damage or excessive mess to the house and completely clean up afterwards.
-Don Plotkin, Derwood

Our new heat pump works just fine!!! Installation was neat and expeditious. All is well.
-Harold B. Curtis, Derwood

Great price, timeliness, outstanding persons to deal with and no pressure. Tony and Bill should be commended for an outstanding presentation and also Chris and his crew for a job well done, thanks again.
-Ruben Montalvo, Derwood

Took the time to explain options in types of furnaces – another competitor recommended one model and didn’t discuss multiple cycle options, etc. Also, your preferred air cleaner brand is superior to Honeywell which is still dominant.
-Dave Lynn, Derwood

Tell Chris that the system is working GREAT in the sunroom. Considering that the room is ALL glass, the bills have been quite low and the comfort factor is amazing.
-David Levin, Derwood

Heating & Air Conditioning Testimonials in Gaithersburg, MD

Matt D. did an excellent job of explaining the options available for selecting a new Heat pump system for our home since ours had died. He was very patient and thorough when discussing the options and answering our questions. The installation team (Shaun, Jason, Mike, and Brian) did a great job. Also, the duct measurement rep, Dave, did a great job as well. They even laid down a canvas runner to protect my hardwood floors. Thanks!
–Vancelle K. Jones, Gaithersburg

The new zoned system you put in is fantastic. For the first time in 26 years, our upstairs is cool. This intense heat has been a good test for the new system. Thanks so much!
–Rich Steffan, Gaithersburg

From the first appointment, through the total job with each and every technician who worked on this installation, the job was done with perfection. Extremely hard to find a company with this high amount of vigilance and this much integrity. I would highly recommend this company to everyone and feel comfortable with the end product and service you will receive. We look forward to a long relationship… Thank you to everyone at GAC Cooling & Heating.
-Nancy and Ronald Holderman, Gaithersburg

Your technicians are always polite, professional and personable. The gentlemen who performed our new system installation were a true team, and a real pleasure to have around!
-Brooke F. Read, Gaithersburg

I have known and asked for Richard Hoffacker when I first started using your service. He has always been most helpful and reliable. So when it came time for replacement I turned to you again – perfect solution. Everyone from the person answering the phone to installers were wonderful. I will/have recommend you to others in my office and neighborhood.
-Trish Travers, Gaithersburg

Your installation team was prompt and efficient – and finished in much less than the promised time. They took the time to explain how everything worked and should be maintained. We’re very happy with our new heat pump!
-C Silvey, Gaithersburg

Richard’s initial visit to troubleshoot the problem and his explanation of my options. He was knowledgeable, informative, and professional.

I was also very pleased and impressed with the installation team lead by Mike and Shaun. They arrived when they said they would. The work was performed in an orderly fashion and when completed the work area was cleared of debris. The closet where the unit is installed looks 100% better. I had WSSC inspect the installation the next day. The inspector took one look and said everything looks good. He saw the Gaithersburg Air sticker on the duct and said, “that’s a good company, I’ve never had problems with them.” That made me feel even better about my choice.
–Faye Blackwell-Smith, Gaithersburg

We have used GAC Cooling & Heating for the past 13 years. We have always been very satisfied with their service. I would highly recommend them. Everyone we have had contact with has been professional and a pleasure to work with.
-Mary Toohey, Gaithersburg

If John is any indication of the rest of your staff, you just got yourself a long term customer. I appreciate him taking the time to share both the strengths and areas to watch in the heating system. Thank you.
-Jim McIntire, Gaithersburg

I have always had positive experiences with your company. I always feel as if everyone is being truthful and not trying to sell me something I don’t need. Everyone that has serviced my unit has been professional and courteous. Because of this experience, I refer your company to others and I know for a fact that these friends are just as happy with your company as I am.
-Lynda A. Bindseil, Gaithersburg

Excellent service was provided; installation was professionally done.
-David Entin, Gaithersburg

Polite, intelligent people answering the phone and prompt service. Great service!!!
-Peter A. Gregori, Gaithersburg

Your courteous and knowledgeable employees are the best company to ever do work at my home. They did a great job on the installation of a new air conditioner several years ago and now an expert furnace installation. Your work and business is 5-Star in my book. Keep doing what you’re doing.
-Mr. & Mrs. Dickerson, Gaithersburg

It’s not easy to find a contractor that you can trust or rely upon without thinking you’re being taken advantage of. With your organization, I get the sense that I can trust you guys for being honest, reliable and competent. It’s nice to have the same technician come to service the equipment. Your office staff is friendly and helpful. Same day service is certainly appreciated as well.
-Mr. Mukesh Patel, Gaithersburg

I want to thank you for the timely response to replace one of our heater units. Your excellent service and quality of workmanship is very much appreciated.
-Robert L. Bartels, Gaithersburg

I have been a maintenance agreement customer for over 10 years and have never had a bad experience. Your staff has ALWAYS arrived on time, conducted the service efficiently and effectively, and left me a happy customer.
-Elise Heumann, Gaithersburg

I was very happy with the options presented and the very fair resolution to my problem, the install was done great and I have always been happy with your services and prices.
-Katie Gurcan, Gaithersburg

I had used them previously for an AC repair last summer and they were wonderful. Once again, they were on time and did a great job.
-Karen Stoos, Gaithersburg

Your team just installed a new unit in my basement. They were here at 8am and out by 10am. They were very professional and did excellent work.
-Jeffrey J. Behnke, Gaithersburg

GAC Cooling & Heating has been servicing my home for quite a number of years. I trust your service to do a good job and be competitive.
-Frank Cardile, Gaithersburg

Thank you so much for the wonderful service! When the a/c compressor died, I thought we might have to wait quite sometime before anyone would be able to come out to look at it. I called at 6:30pm Thursday evening and left a somewhat frantic message for someone to call in the morning–I received a callback at 7am, and Dave was here promptly at 9am.

 By 10am he had already scheduled us for a new a/c unit and coil installation at 1:00pm! Your staff was here early, worked very efficiently, and our unit was up and running by 2:30pm! Being eight months pregnant, I am especially appreciative of the speed at which our problem was resolved. I have only good things to say about your work, and would recommend you to anyone! Thanks again! Your courtesy and timeliness was excellent, making our decision to use you again very easy!
-Brad and Jennifer Ehlers, Gaithersburg

Heating & Air Conditioning Testimonials in Germantown, MD

John was awesome! Right on time, SUPER courteous, and very informative. 
-Shyam Nathan, Germantown

We are most pleased. Everyone was professional, efficient, knowledgeable, polite. 
-Jan Tommila & Edward Scheiderer, Germantown

I felt like you sent the A Team out to do our installation. They did a great job. The WSSC inspector was quite complimentary about the installation work of my new AC/Heating system. Thanks much!
-Ed Kelley, Germantown

We appreciate how quickly you responded. You were very prompt. We always were treated courteously, in person and on the phone. We are very pleased with your service! 
-Mike Grossman, Germantown

From the moment I contacted GAC Cooling & Heating about replacing our old oil-based and converting to natural gas, I felt comfortable and at ease. Tony and every member of his team we had the pleasure of meeting and working with were knowledgeable, professional and pleasant. I really don’t think we could have found anyone better. I wouldn’t hesitate to use them or recommend them to my friends. Thanks again, guys! 
-Jason and Rebecca Kuper, Germantown

I am highly impressed by your company and currently am totally satisfied with my new system. If there were higher marks than excellent, I would give them.
-Charles Davis, Germantown

I was very impressed today by your team. I really appreciated…your willingness to come out and install my heat pump so quickly after hearing about my heart condition and how important it is for me to have air conditioning in humid weather! I also appreciated how paper sheeting was put down so mud wasn’t tracked through my house and how your entire team took great care to take off their shoes when they went to different areas of the house. I felt you showed a great deal of respect for my home and professionalism in your work. Thank you so much!
-Katrina Ivatts, Germantown

I was very pleased with the service. They were honest, courteous and professional. They did the job in a quick, timely manner. Thank you for all your help.
-Mr. Hernandez, Germantown

Your men were extremely well organized, knowledgeable, productive and obviously had a very good work ethic. They were also very comfortable to have around. Once in a while, some make me apprehensive. Your men are excellent and Chris really inspires trust.
-Ms. Raser, Germantown

The staff was extremely professional and helpful. Chris even walked me through the functions of my thermostat, he was patient and courteous. I would highly recommend your services to any of my friends. Thank you very much.
-Mr. Joseph, Germantown

Heating & Air Conditioning Testimonials in Laytonsville, MD

Excellent reputation and personal contact. We will recommend you to anyone we know in need of A/C Heating specialists. Thank you! 
-Rich and Denise Kayser, Laytonsville

Installation team was very thorough and professional and completed the job expeditiously. A great job by all. 
-Nicholas J. Riccio, Laytonsville

Great job installing our new system. I will be referring your business for heating and a.c. service. Thank you. 
-Kirk Bender, Laytonsville

Heating & Air Conditioning Testimonials in Montgomery Village, MD

I’ve been a customer for years. I like the friendliness, quick response, and knowledge of the techs who have service my units. I decide why leave a good thing when I needed my furnace/air changed. I don’t regret my decision. Anyone I have talked to or met from your company has been professional and friendly. Thanks for being old fashioned and really caring for your customers. 
-Aileen Murphy, Montgomery Village

All of the crew who worked at my home were courteous, professional and knowledgeable. The demeanor and appearance and obvious concern for my satisfaction have created a true sense of trust and I will gladly recommend your company whenever possible. Thank you. 
-Elizabeth Ryan, Montgomery Village

Your people are very courteous and very efficient. It is a pleasure to do business with you. 
-Joseph McPhillips, Montgomery Village

We have been living in this house since 1977 and your company serviced our A/C and furnace every time we called. This is the second A/C and furnace your company installed for us. We wouldn’t think of using anyone else. We have always been very satisfied with your service and your wonderful staff. ****** rating! 
-Shelton & Lily Jackson, Montgomery Village

All of your technicians (including Jason) that were involved with our installation were outstanding. Their knowledge, professionalism, expertise and efficiency were superb. They met and exceeded our expectations. It is a pleasure dealing with people and a company like this. 
-James R. and Candace M. Frame, Montgomery Village

We are long-term customers for over 32 years. Mike, Matt and Richard did a very professional job from problem identification to installation. We will recommend you to any of our neighbors. Thank you! 
-Dennis J. Clark, Montgomery Village

I was so impressed with the professionalism demonstrated by all of your team members who helped with the installation. The team operated in unison and were very knowledgeable. They completed the job efficiently and timely. They were very respectful of our home and possessions.
-Ralph and Arrietta Wagner, Montgomery Village

We have always been pleased with your performance in the past as well as the professionalism of your employees.
-Mary-Beth Heald-Myers, Montgomery Village

Have been a customer since 1979! Delighted!
-Susan Frampton, Montgomery Village

You provided excellent service over the past 25 years. You provide service to most of my neighbors. I always recommend you when I hear of someone needing heat or a/c service.
-W. Kevin Hainsworth, Montgomery Village

Richard initially came out to examine my heat pump and he spent a good deal of time assessing the problem, explaining it to me and was overall an excellent representative of the company. The guys that came out today to install my new heat pump and air handler were wonderful, friendly, courteous, respectful and very patient with my questions…they were a great team!
-Sue L. Thompson, Montgomery Village

We have been satisfied with the service every time we have used your company. The technicians are pleasant, clean and patient explaining the problem/resolution.
-Janet Soressi, Montgomery Village

Your staff is great from the office staff who handled the call to the technicians who serviced and installed my new equipment.
-Elaine Brady, Montgomery Village

Heating & Air Conditioning Testimonials in North Potomac, MD

All service businesses should be run as well as yours. 
-Lee Menningen, North Potomac

Thanks for a job well done! It was nice to meet the owner. He and his technicians provided prompt, professional and courteous service. 
-Mary Abbott, North Potomac

The entire experience was excellent and will refer your company without reservation. 
-Mr. Selwood, North Potomac

Matt did an excellent job of explaining the options available for selecting a new heat pump system for our home since ours had died. He was very patient and thorough when discussing the options and answering our questions. The installation team did a great job. Thanks! 
-Vancelle K. Jones, North Potomac

I want to thank Mike, Brian, Jason and Shaun for the excellent installation and the care they took in the procedure. Also want to thank Jason for his thorough assessment and explanation of our options. 
-Larry Wahl, North Potomac

Chris, the installer, was great. And I want to thank the supervisor who was able to juggle the schedule around so that you were able to do a same-day emergency AC installation so we could leave town the next morning for a previously arranged vacation.
-John Weld, North Potomac

Your office personnel, technicians and install team are all very professional. I would not hesitate to recommend your company.
-Ralph Frisbee, North Potomac

Three years ago you installed a new AC unit. Since then I have relied on you for service.
-Richard Swerlow, North Potomac

I would like to take this opportunity to thank you all for taking such good care of my home. Truly appreciate it.
-James Tsou, North Potomac

Service has always been excellent and service personnel courteous and professional. They wipe their feet before coming into the house!
-Gil and Diane Wright, Jr. , North Potomac

Excellent customer service. Extremely satisfied with previous service concerning conversion from oil to gas heat.
-Larry Nadel, North Potomac

Heating & Air Conditioning Testimonials in Olney/Brookeville, MD

From start to finish, Jon, Joe and the entire installation crew we very impressive with their service and follow through! I will be referring you to more colleagues, clients and friends! 
-Ron & Deborah Marcus, Olney/Brookeville

Your representative and company have provided the best level of service of any service company I have used. There is no point in looking at any other provider!
-Douglas Conley, Olney/Brookeville

We were very pleased with everything and will recommend you to our friends.
-Mr. Shankman, Olney/Brookeville, MD

We appreciated the time Chris spent explaining the technical aspects of selecting and operating the furnace.
-Mr. Price, Olney/Brookeville

Your team was neat courteous, very professional, good communicators and demonstrated excellent teamwork. We were exceptionally happy with your service.
-Mr. Connors, Olney/Brookeville

I was so impressed by both the professional appearance of the technicians, but also with the bid, initial consultation, and explanation of our new system. Thank you so much – You should be very proud of the image you present and the quality of your work.
-Jennifer Johnson, Olney/Brookeville

Very pleased with overall experience. Office staff, as well as HVAC techs, were efficient and professional. Would highly recommend to friends.
-Mrs. Little, Olney/Brookeville

Heating & Air Conditioning Testimonials in Potomac, MD

Mike, Shawn, Jason & Brian were terrific and professional. Overall excellent customer service. Thank you!!!
-Elina Khurgel, Potomac

You are a true gem in today’s pool of service providers. Honest, frank and service oriented. Thanks.
-Kathy Korda, Potomac

We are extremely pleased with your service. Today’s installation crew was outstanding in terms of workmanship, timeliness, courtesy, etc. Also, Jason did an excellent job helping us to decide on the unit to purchase.
-August Spector, Potomac

The workmen were extremely courteous and professional. I highly recommend them.
-Jerry Joseph, Potomac

Consistently good work and friendly and thoughtful service.
-Allan Kukalow, Potomac

I have been a satisfied customer for over 25 years. I am impressed that over that time, your colleagues have always been punctual, problems are fixed the first time, services are reasonably priced, you only try to sell me what I need and my home always looks as neat after a service call as it did before. I look forward to our continuing long term relationship.
-Howard Wilchins, Potomac

You had installed a new A/C about 20 years ago; we found you were still highly rated by (a leading consumer ratings guide). Highly impressed with Chris Leonard’s ability to address our problem and concerns (and his detailed, clearly laid out proposal) –and that he would be part of the installation team, an important factor to us because of complications involved with bringing the existing system up to code.

We have a service contract with another company, but they wouldn’t do the grille work or cut an access to the flue pipe. Although another contractor, also double-check-rated in (leading consumer ratings guide), gave us a much lower estimate, Chris was able to modify the cost enough so that we felt okay with not going with the lower estimate.

Chris and the team inspired trust — from the initial proposal stage through completion of the work. They even called to let me know they were held up in traffic but would be here soon. No one ever got annoyed if I asked a question, as many contractors do. I especially appreciate Chris’s and Bill’s patience at the very end. They didn’t rush off. They explained everything. It is always stressful for me to have people working in my home for half a day, and I was not well today to boot — but they did indeed make it as comfortable an experience as it could be. Thank you!
-Bob & Laurie Sunshine, Potomac

We have been extremely pleased with the service and the techs who do the work. They are always on time and arrive looking neat and clean. If we call with a problem, we have been serviced that same day. We are very happy we switched to your company a year or so ago. Thank you.
-Joanne Lewis, Potomac

I’m always amazed (and thankful) that the level of service in this company has remained so superior over the years. You are easy to communicate with, efficient, jobs are done right the first time (that’s unheard of in this business), and provide a pleasant experience overall. Also, your website is excellent. Keep it up!
-Mr. & Mrs. Crater, Potomac

Heating & Air Conditioning Testimonials in Rockville, MD

Your group was very professional and one of the best contractor experiences I have had since I purchased my home 10 years ago.
-Beth Sturgess, Rockville

Jason did a great job – factual presentation of options without any sales pressure. The installation crew did a really professional job. If anyone ever asks for a recommendation for this type of work, you are on the top of my list. 
-Robert Clarke, Rockville

I have been a customer of yours for a long time, based on my experience, I have full confidence in your team. You have always met or exceeded expectation. Thank you again for a job well done. 
-Ralph DeStefano, Rockville

I have used your company for heating/ac needs for 23 years. I have always been extremely pleased with the service and quality. 
-Patricia Goldman, Rockville

Prompt response, professionalism, kind and courteous employees, willingness to help, seemed to really care about my family. 
-Michele Walsh, Rockville

Fair, reliable, dependable, honest, knowledgeable. We have talked to all of our neighbors about your outstanding service. 
-Ralph and Cat Kahn, Rockville

I have dealt exclusively with GAC Cooling & Heating for 25 years. Richard is an excellent technician and truly trustworthy. I recommend him to all my friends. 
-Joyce Maguire, Rockville

Initially when we called to ask for help we were treated respectfully and kindly. A prompt rerun call was made to confirm the initial visit also with courtesy and efficiency…Our house now feels like a home and not a meat locker, as it did before. Thank you. 
-Barbara Bryden, Rockville

Prompt service to evaluate our problem and subsequent time that the air conditioner and furnace could be replaced – less than 24 hours!!! I would highly recommend your professional crew to anyone that needed a replacement air conditioner and furnace. 
-Alice and Robert Sobsey, Rockville

You sent a real professional team.
-Sherman Francisco, Rockville

We needed emergency service 5 years ago on Christmas day and our neighbor recommended you. We were impressed with the response and the service.
-George Brew, Rockville

I have kicked myself every day that I have not returned this survey, BUT I am glad that I waited, because I received on Monday night (the coldest day of the year) a strange message on my thermostat requiring attention. I cannot think of another business where at 10:30pm the owner of the company would make a house call and be absolutely lovely about it. Thank you to your company! I couldn’t be happier with your service.
-Abigail Betts, Rockville

We have used your services for years and have been pleased with the results.
-Susan & George Spangler/Jennifer Lyons, Rockville

Great job, very happy with your service.
-Robert & Susan Harrison, Rockville

Tony gave a lot of attention to our needs, provided brochures and answered questions completely; seemed very professional; excellent price.
-Martine Palmiter, Rockville

Overall – one of the few pleasurable experiences we’ve had in this area with a contractor (i.e. on time, professional installation, no mess left in work area, all new equipment/wiring installed, etc.). Installation was performed AS PROMISED – no surprises. We will recommend your company to others. My wife was happy and that means everything 🙂
-Brian Jablon, Rockville

We have been dealing with you for close to ten years and have been satisfied from the start.
-Aaron Kinberg, Rockville

Schedule Heating & Air Conditioning Service in Maryland

At GAC Cooling & Heating, we want you to experience whole home comfort. We pride ourselves on looking at the “whole picture” when it comes to your comfort – not solely the heating and air conditioning equipment. If you’ve read what our customers have to say about us and you’re interested in heating and air conditioning service in Maryland, contact us today for a free estimate.  

"Your technicians are always polite, professional and personable. The gentlemen who performed our new system installation were a true team, and a real pleasure to have around! "

We proudly serve the following locations in Maryland:

Montgomery County: Ashton, Barnesville, Beallsville, Bethesda, Boyds, Brinklow, Brookeville, Burtonsville, Cabin John, Chevy Chase, Clarksburg, Damascus, Derwood, Dickerson, Gaithersburg, Garrett Park, Germantown, Glen Echo, Kensington, Laytonsville, Montgomery Village, Olney, Takoma Park, Poolesville, Potomac, Rockville, Silver Spring, Spencerville, Urbana, Washington Grove

Howard County: Clarksville, Columbia, Cooksville, Dayton, Ellicott City, Fulton, Glenelg, Highland, Woodbine

Frederick County: Adamstown, Braddock Heights, Buckeystown, Frederick, Ijamsville, Middletown, Monrovia, Mt. Airy, New Market

Request An Estimate
© Copyright 2020 Gaithersburg Air Conditioning & Heating. All rights reserved.
The information on this website is for informational purposes only; it is deemed accurate but not guaranteed. It does not constitute professional advice. All information is subject to change at any time without notice. Contact us for complete details.