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MD (301) 260-6000 VA (703) 777-9211

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Full Service HVAC Contractor in Bethesda, MD

When it comes to maintaining a comfortable environment within your home or place of business, there’s no room for compromises. At Mannix Heating & Cooling, we bring you reliable HVAC services right here in Bethesda, Maryland. We’re a locally-owned company that prides itself on top-quality HVAC services. Our team is certified, insured, and experienced, poised to handle all your heating and cooling needs.

With a reputation built on trust and reliable service, Mannix Heating & Cooling offers an array of HVAC services. These include air conditioner repair, furnace repair, and heat pump installation services. We also provide HVAC analysis and risk assessments aimed at ensuring your current system operates efficiently, reducing energy costs and minimizing any potential hazards. Our comprehensive maintenance services can help you preemptively address any potential breakdowns, further saving you from costly repairs and system downtimes.

When you require new equipment installations, we work with some of the best brands in the industry, providing you with durable and high-performance HVAC systems. Whether it’s a full-scale commercial installation or a residential HVAC replacement, our team commits to providing you with a system that suits your unique needs and preferences.

Choose Mannix Heating & Cooling for Your HVAC Services

Hiring the right HVAC contractor is critical to the upkeep and longevity of your system. As an established HVAC contractor in Bethesda, MD, you can confidently turn to Mannix Heating & Cooling for all your heating and cooling requirements. We leverage our extensive industry knowledge, state-of-the-art technology, and a customer-focused approach to deliver uncompromised service quality.

With our 24/7 emergency services, you can count on us to attend to your HVAC issues whenever you need it. Our technicians will quickly diagnose and rectify your problems, ensuring minimal disruption to your routine. At Mannix Heating & Cooling, we understand that every problem is unique – we offer customized solutions designed to address your specific situation effectively.

Customer Satisfaction is our Top Priority at Mannix Heating & Cooling

Quality isn’t just in the services we provide – we believe in maintaining a quality relationship with our clients. Your comfort and satisfaction are our top priorities at Mannix Heating & Cooling. Our team promptly responds to your calls, and we ensure transparent communication throughout the service process.

We’re skilled at managing both small and big HVAC tasks, ensuring impeccable execution and an impressive turnaround time. Customer testimonials and repeat business bear testament to the quality and reliability of our services. To ensure peace of mind, all our services come with a guarantee.

In conclusion, Mannix Heating & Cooling sets the bar high for HVAC services in Bethesda, MD. As your trusted HVAC contractor, allow us to help you create and maintain the perfect indoor environment. Remember, a professional touch can make all the difference – and that’s exactly what we provide at Mannix Heating & Cooling.

Furnace Repair, AC Service, Heating Installation & HVAC Near Me in Bethesda, MD

Furnace Repair in Bethesda, MD | HVAC Near Me

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Customer Reviews

Shondra J ones

They were lifesavers!!! My furnace went out and after three days of dealing with the home warranty company and the unscrupulous vendor they sent to my home, I called Mannix. The service technician was friendly, efficient but most of all honest. He found the problem after twenty minutes, saving me thousands in unnecessary replacement costs. It is refreshing to know that honest people still exist.

Lynne Wilson

I contacted Mannix from a referral of a friend who has benefitted from the excellent service this company provides. I found out a couple I know in Vienna had their heat pump stop working a few months ago and needed to be replaced. I called up the Mannix office later in the day on Monday 11/30/20 and provided information needed. I had a proposal in my email the next morning 12-01-20. This will enable me to discuss with my friends how they wish to proceed with fair financing options available too. This is EXCELLENT customer service and I would like Mr. Mannix to know that Sarah is an amazing professional face for his company. I plan to become a customer of theirs by signing up for the annual maintenance plan which is very reasonable priced. Sincerely, Lynne Wilson

Philip Slingerland

Been a happy Mannix customer for a few years now, but recently had them replace our aging HVAC system. The whole process was very painless, from Eric helping us decide which system was right for our home, to the efficient and professional installation by Billy and Matt. I am very pleased with the new system and very impressed with the level of service, communication, and detailed information I received from everyone involved. Highly recommend!


Before dealing with Mannix I used two very well-known and “reputable” HVAC companies who did nothing but rip us off over the years. I was frustrated and found Mannix Heating & Cooling about 10 years ago. They installed a new HVAC system in my old home, and installed a water heater and various other items in my new home. They also have been doing yearly maintenance for years. Their employees are the most honest, reliable, and knowledgeable individuals in this industry. We recently had an issue with our HVAC system and they came out within a few hours on an emergency call. The technician was prompt, kind, professional, and very fair. He figured out what was wrong with our system quickly and remedied it immediately. Do not hesitate to call them if you need anything–you won’t regret it!

Wendy Collins

Mannix has always been professional from service calls to repairs and replacements. The technicians are always polite and knowledgeable. They consistently exceed our expectations.

Gary Hendricks

Mannix proved very responsive in fixing my A/C system. The tech, Erick, was very professional by taking the time showing and explaining to me the system problem prior to taking action replacing the coil. Ashleigh, customer service, was excellent in addressing and following through on concerns in order to achieve total customer satisfaction.

M. Reyzer

My 24-year-old heat pump finally decided to stop working. I sent a request for a replacement estimate late one night through the Mannix website and received a phone call early the very next morning to set up an appointment. Eric Holzworth stopped by my house the next day to go over my options. He was wonderful and so easy to work with and answered every question I had. He definitely listened to me and my concerns did not push me into purchasing a high-end system which I didn’t need. The technicians arrived at 8am and were finished with the entire installation by 1pm. They were very courteous and left my house in pristine condition. I HIGHLY recommend Mannix! They always returned my calls and emails right away, and Eric made sure I received all of my equipment on time–even with Carrier factory delays/limited supplies due to COVID. So glad I chose Mannix. I love my brand new Carrier system and my cold house during these hot and humid days.


We were in desperate need of a fix on our AC system during the July heatwave. The issue arose on a Saturday. Mannix came to the rescue in short order, fixed it, and at a reasonable price.

Silvio G was the technician, and he was GREAT.

We would definitely use Mannix again!

Patricia Ryan

I have been using Mannix for years. They have replaced my HVAC system and I have them do maintenance twice a year. The past couple of visits have been done by Ramiro. He is professional, polite, knowledgeable, and very helpful in assisting me with tips on the best ways to operate my system. Today, he installed a water safety device and taught me exactly how it works and how to reset it. I’m so impressed with him! I will continue with Mannix for years to come as I find them to be very reputable and reliable. Thank you!

Rachel Craft

I’ve been using Mannix for years and have never been disappointed. They’ve replaced my HVAC, hot water heater and installed a humidifier on my furnace. Whenever I need them, they can get me on the schedule in a timely manner. All the personnel are great and I trust Jerry and his team with their recommendations and the work they do. Would highly recommend.

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