Mannix Heating & Cooling of Gaithersburg, MD

Located in Gaithersburg, Maryland

Address: 7824 Beechcraft Ave, Gaithersburg, MD 20879, United States

Phone: +1 301-260-6000

Rating: 4.9

Services

Wheelchair-accessible car park
Repair services
Credit cards

Photos

Latest Fire Recovery & Restoration Services

Comments

Review 1 (2024-12-04 - Rating: 5)
I have been working with Mannix Heating & Cooling for 4 years since they installed my heating and cooling systems and I have no complaints. In fact, only good things to say about them which motivated this review.Today was a great example. Technician Erick Aviles visited me today to check my heating system. He did a great job because he carefully evaluated the issue, found the root cause, made the necessary repair and explained everything in a way that is easy to understand. Erick is a great example of the professionalism and high quality service offered by this company.Highly recommend working with them.

Review 2 (2024-10-05 - Rating: 5)
My A/C blower motor was flooded during Hurricane Helene here in Florida. The technician (Than?) was amazing! Prompt, excellent communications, and knowledgeable. His diagnosis (wiring harness connections failed due to water damage) was 100% correct.

Review 3 (2025-01-03 - Rating: 5)
Just had KP complete my semi annual maintenance review of my heating system. He was courteous, efficient, thorough, gave me additional recommendations to keep my system running at top efficiency, and was very nice. Highly recommend Mannix and KP.

Review 4 (2024-10-04 - Rating: 5)
Weve used Mannix for years and they are always great - work and prices. Today Keith help us solve a major airflow issue in our house. He took extra time to work the problem and to show us how we can make adjustments ourselves in the future. We highly recommend Mannix.

Review 5 (2024-12-14 - Rating: 5)
Many thanks to Erick Aviles and Rem Ber from Mannix for their professional work on my HVAC system. They were prompt and super friendly even as I checked in a number of times and they patiently explained the work progress to replace a faulty gas heat exchanger. Also they emailed details to me via email, including before and after pics. Great job gentlemen and thanks to the rest of Mannix for working on my system, especially for catching the carbon monoxide issue early.

Review 6 (2024-11-12 - Rating: 5)
We appreciate the excellent work everyone at Mannix did for us when needed a new unit. Roop was spot on with his recommendations as he listened to our needs. Courtney was kind and informative with helping to schedule the installation. Mark and Marcello (?sp?) was awesome with the instillation. They finished faster than expected and cleaned up very well. Also Thanks to the owner Jerry who listened and answered all our questions and concerns. This a a quality job and team from top to bottom.

Review 7 (2024-10-14 - Rating: 5)
I was able to get a new Rheem compressor, furnace and thermostat for a very competitive price. The installation was professionally done, and the installers double-checked each others work.The only potential problem is if you have any additional requirements that go into the work agreement, they can get buried in the fine print. This can get overlooked by the install crew, so:1) You must be vigilant, and....2) Mannix needs to correct the formatting of their work agreements. A minor issue, and a simple fix.

Review 8 (2024-10-20 - Rating: 5)
Mannix adjusted their arrival time to my schedule which I did appreciate. The service man arrived within the time window and I was impressed by his professionalism and skill. He performed the service and explained to me what needed to be done. I would recommend this company to anyone needing thorough service carried

Review 9 (2024-09-28 - Rating: 5)
I had a problem with my air conditioner and Mannix came out the same day. The technician Jaime easily diagnosed and fixed the problem. I also had him check my system humidifier and he diagnosed that issue which another tech had been unsure about. Mannix always gives prompt and excellent service

Review 10 (2024-10-07 - Rating: 5)
I recently had a Zone system installed by Jose and his helper and it was done with no problems. Jose was very good at explaining the system and answering my questions. He and his helper were efficient, thorough, and left the work areas clean. In following up on the job, Sonya was able to answer my questions and provide me with an invoice. The system seems to be working well at this time!

Review 11 (2024-12-24 - Rating: 5)
We had to call in an emergency call into Mannix when our brand new furnace stopped heating in advance of a night in the teens. Rember Bonilla came out in short notice and was able to quickly and correctly diagnose the root cause of our non-functional furnace. While he was unable to fix the installation problem on the spot, Rember set us up for a next-day visit by the install team who were able to fix the original problem. We are very appreciative of Rember’s efforts, as well as those of Matt and Marcelino who came out the next day to conduct the repairs.Edited to add our appreciation for Erick Aviles’ efforts who came out on equally short notice on Xmas eve, and who quickly and efficiently resolved a separate installation issue that only became apparent after the previous day’s repairs. A great team effort by the folks at Mannix.

Review 12 (2024-09-27 - Rating: 5)
We have been using Mannix for over a decade. They are reliable and knowledgeable and frequently go above and beyond the call of duty. Our tech this week, Jaime, in addition to carrying out the repair he came for, fixed an issue we did not know we had, at no cost, and also gave advice on a hot water heater issue.

Review 13 (2024-09-27 - Rating: 5)
Erick Aviles serviced my air conditioner this afternoon and was prompt, courteous and thorough. He quickly identified the problem and immediately went to work and fixed. He explained what happened and prepared me for the fall service. Hes incredible! Thank you.

Review 14 (2024-10-28 - Rating: 5)
Professional throughout. The salesperson, Roop, recommended a lower-cost unit with similar quality to the higher-priced units, but with fewer features that we didnt care about. No other company did that. The field supervisor, Silvio, arrived early and explained everything clearly. Overall a great experience. Highly recommended.

Review 15 (2024-08-06 - Rating: 5)
Outstanding service from Mannix Heating & Cooling. They installed my HVAC system and water heater almost 5 years ago and have maintained all ever since. My A/C went out last Friday -- another of our 2024 heat waves and the technician came that night and quickly repaired the A/C. Thank you Mannix!

Review 16 (2024-10-13 - Rating: 5)
Excellent at all levels! Tech (Eric) arrived on time, was courteous and helpful, answering all my questions. We are very pleased with the experience and will recommend Mannix to anyone who asks.

Review 17 (2024-10-08 - Rating: 5)
Always more than happy to depend on, and recommend Mannix HVAC. Ive used Mannix since they installed my unit about 10 years ago, and gladly shared my great experiences with friends and family, who have hired them as well. Added shoutout to Keith who is the technician who usually comes to my house for routine maintenance! He is super friendly, kind, and very knowledgeable about my system, and gives me great tips for continued success for my HVAC needs.

Review 18 (2024-10-03 - Rating: 5)
I have been using Mannix for almost 10 years now. Rember visited my home yesterday to complete the fall maintenance. I have requested Rember since the first time he came. He is polite, explains everything in terms I can understand, and never gets frustrated if I ask questions. If Ive needed work, he explained why. Hes a great asset to the company, and I hope hes there for years to come.

Review 19 (2024-09-13 - Rating: 5)
I have Stage IV lung melanoma and, while this presentation is not meant to secure any sympathy, you just have to imagine what it was like to enter your condo after an arduous day to 90 degree heat. That is basically how I started with Mannix two nights ago and I can honestly write that their efforts were a God send. The service representative got me back working that very night and additionally helped me with a part of my outgoing water that needed to be fixed. I can not say enough to express the relief I felt after the immediate impact of the discomfort of walking into the intensely uncomfortable heat two nights ago. I highly recommend this company, Mannix, to any interested party. God bless, Andy Larson

Review 20 (2024-11-04 - Rating: 4)
Keith Hellin came to fix an issue with our heater. He was very courteous, professional and kind. He took the time to explain what was wrong and how he went about fixing the problem. Thank you, Keith!

Review 21 (2024-10-17 - Rating: 5)
We has our HVAC installed by Mannix about 10 years ago and continue to have is serviced 2x year by them. Jaime, who did our recent service, has been here several times and is always pleasant and professional :)

Review 22 (2024-09-09 - Rating: 5)
Mannix Heating and Cooling have been my HVAC company for many years. Their technicians are knowledgeable, experienced, polite snd prompt. Others advertise five stars but Mannix IS 5 Star, in every respect.

Review 23 (2024-11-01 - Rating: 5)
We scheduled our annual heating maintenance. Keith and Jaime performed thorough work and were great communicators. Thank you, Mannix for the excellent service!

Review 24 (2024-10-24 - Rating: 5)
Mannix has been my choice for years to take care of hvac needs at my own home, and as a Realtor, I refer them to my clients. I recommend a service contract to keep everything running smoothly and prevent issues.

Review 25 (2024-12-26 - Rating: 5)
Just had a visit by Mr. Erick Aviles to work on my thermostats. Extremely professional and courteous. Would ask for him next time I need HVAC service.

Review 26 (2024-11-01 - Rating: 5)
Ive used Mannix for years. Erick performed the winter inspection recently. He was on time, professional and everything looks good with my system. Thanks!

Review 27 (2024-12-19 - Rating: 5)
Very good Fall maintenance service provided by Kevin from Mannix on our Carrier Heat Pump. Thanks

Review 28 (2024-10-29 - Rating: 5)
The technicians are polite and arrive on time. They always give a summary and answer any questions we may have. Always impressed with the professionalism.

Review 29 (2024-10-15 - Rating: 5)
Erick was the absolute best! He was honest and very knowledgeable. I wish I could request him every time.

Review 30 (2024-10-14 - Rating: 5)
Keith is a great professional: extremely knowledgeable and honest regarding what was necessary and what wasnt. Highly recommend.

Review 31 (2025-01-03 - Rating: 5)
Emanuel came to my home today to service the heating unit and was great! Personable and professional - qualities that are hard to find in the service industries these days. Well done! Thank you, Emanuel.

Review 32 (2024-08-02 - Rating: 5)
Highly Recommend. Always a great experience with Mannix Heating & Cooling. They are honest, responsive, and really care about their customers.

Review 33 (2024-11-01 - Rating: 5)
Jaime, the technician, provided excellent service. He was very professional, knowledgeable, efficient, and personable.

Review 34 (2024-10-16 - Rating: 5)
The technicians are all courteous and professional. They always thoroughly explain the preventive maintenance work performed.

Review 35 (2024-12-11 - Rating: 5)
Excellent service! The technician was courteous and took the time to explain everything.

Review 36 (2024-12-18 - Rating: 5)
The Mannix service person was great, Erick Avila was prompt, explained everything and fixed the problem

Review 37 (2024-08-02 - Rating: 5)
Fair, prompt, reasonably priced and great overall service.

Review 38 (2024-11-04 - Rating: 5)
Excellent service that was not overpriced. The technician, Thanh Le, was professional, personable and very efficient.

Review 39 (2024-12-08 - Rating: 5)
Rember was fantastic - great company and super helpful!

Review 40 (2025-01-03 - Rating: 5)
Erick Aviles was very knowledgeable, curteous and dealt with the issue competently. He is an asset to the company.

Review 41 (2024-08-04 - Rating: 5)
Considering our AC is fairly old, the mechanic did the best he could. We are thinking of exchanging the system soon enough.

Review 42 (2024-09-22 - Rating: 5)
Attentive - excellent service- knowledgeable technicians. Have used them for years on multiple properties.

Review 43 (2024-10-30 - Rating: 5)
Mannix did a great job for us. Our technician, Keith, arrived on time and was very knowledgeable and helpful during the service call. We’ve used Mannix on two houses now and we’ll continue to recommend them.

Review 44 (2024-09-05 - Rating: 5)
Technician was extremely thorough and kept me informed of what he was doing.

Review 45 (2024-11-10 - Rating: 5)
Great service from our technician, Justin. He was very knowledgeable and took the time to go over any questions we had and completed the service to our satisfaction.

Review 46 (2021-04-04 - Rating: 5)
I dont write many reviews, but in this case I believed one was well deserved. Mannix Heating and Cooling was hired to remove and replace the gas furnace in our condominium a few months ago. They did a great job with the furnace, but what impressed me even more was the customer service I received. I dealt directly with the owner, Jerry Mannix, and I had a lot of questions since this was a pretty major purchase. Its rare that I ever feel completely comfortable with most contractors these days, but I was pleasantly surprised to find that there are still some who do truly care about their customers satisfaction and the quality of their work. I really cant say enough about how pleased I was with the overall experience I had with Mannix Heating and Cooling. Thank you Jerry!

Review 47 (2019-06-13 - Rating: 5)
Mannix technician Oscar came out last week to do a yearly check on our air conditioning systems. He was so knowledgeable and helpful about explaining things to us, and he went above and beyond to get the system working properly. We were very impressed the Mannix service.

Review 48 (2024-12-05 - Rating: 5)
Mannix has been handling my HVAC installation and maintenance for the last 11 years, Erick Aviles was the technician that did my most recent maintenance, courteous and answered all my questions and addressed all concerns

Review 49 (2024-10-11 - Rating: 5)
Ive always gotten good service from Mannix.

Review 50 (2023-11-28 - Rating: 5)
Erick Aviles did an outstanding job checking our heating system and preparing it for winter. Please send him out the next time I call for service. Thanks.

Review 51 (2024-12-05 - Rating: 5)
Erick is always very thorough and helpful!

Review 52 (2024-05-10 - Rating: 5)
Erick Vega arrived on time as scheduled and did services very concientiously. He was also very communicative.

Review 53 (2024-08-16 - Rating: 5)
Been using Mannix for years and highly recommend!

Review 54 (2018-04-14 - Rating: 5)
Exceptional experience from Mannix in Gaithersburg!! We just put in a new system after working with Steve who did a fabulous job of educating us and helping us choose just the right HVAC for our home.Billy and Matt did the installation. They arrived precisely when promised, were efficient, friendly and respectfully put on shoe covers the moment they entered our home. We couldnt have asked for a better value (we did our homework on pricing and best equipment) or a smoother process. They turned a potentially daunting task and investment into one of our best home maintenance projects ever!

Review 55 (2024-10-31 - Rating: 5)
Great service and expertise at a fair price.

Review 56 (2024-07-31 - Rating: 5)
Very honest and reliable. Great customer service.

Review 57 (2018-05-14 - Rating: 5)
Cant say enough about Mannix and the entire team in Gaithersburg....Steve, Richard & Charles are top notch, professional and experts in what they do! They replaced my AC & Furnace in my attic almost two years ago and just finished installing the AC & Furnace in my basement. Will happily refer them to my friends and family! Thanks!

Review 58 (2024-10-07 - Rating: 5)
Caught a problem that could have caused me to lose heat when it gets colder. Jaime is a wonderful technician—friendly and professional.

Review 59 (2024-07-29 - Rating: 5)
A great experience. Will continue to support this company.

Review 60 (2018-05-10 - Rating: 5)
Richard and Charles from the Gaithersburg office just installed a mini split system in my personal training studio. Both men went above and beyond to complete my job. In fact, they encountered a technical difficulty and remained on the job until it was completed. I would highly recommend you request Richard and Charles from the Gaithersburg office for your upcoming HVAC job.Overall, my wife and I have been customers of Mannix for five years. We have only used Steve Brimsfield, Mannix’s sales rep, for three jobs. Most importantly, purchase the service contract that entitles you to a spring and fall maintanence. Mannix’s customer service is over the top. Give them a call today.

Review 61 (2024-10-05 - Rating: 5)
They were thorough and very efficient.

Review 62 (2024-08-29 - Rating: 5)
Eric was absolutely great very professional and knowledgeable. Thanks for your quick response and solution to my problem.

Review 63 (2024-10-09 - Rating: 5)
Arrived on time. Excellent service.

Review 64 (2024-10-24 - Rating: 5)
The only HVAC company I trust!

Review 65 (2024-11-06 - Rating: 5)
Great service, awesome technicians!!

Review 66 (2024-10-13 - Rating: 5)
Was a great experience. Thanks

Review 67 (2024-07-30 - Rating: 5)
Very good company to work with

Review 68 (2024-10-05 - Rating: 5)
Thank you Erick!

Review 69 (2024-09-08 - Rating: 5)
Thorough, and well executed

Review 70 (2023-07-30 - Rating: 4)
Tech Erick Aviles was very responsive to emergency call after our a/c unit failed unexpectedly. Mannix fees were somewhat on the high/exorbitant side. I was charged $500 for a capacitor that costs $20 and took 15 minutes to install.

Review 71 (2024-10-13 - Rating: 5)
Great experience

Review 72 (2024-10-20 - Rating: 5)
Answered previously.

Review 73 (2025-01-10 - Rating: 5)
Emanuel was fabulous when he came to do our winter service. He spent time checking our two furnaces, including the outside parts buried in snow, and took the time to check the ductwork in our attic at my husband’s request. We have always had excellent service from Mannix Heating and Cooling.