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Contact Mannix Heating and Cooling for HVAC and Pool Heat Pump Service Today!

We are more than just a HVAC contractor; we are a team of trained and experienced professionals committed to delivering high-quality heating, ventilation, and air conditioning services to our valued clients in Rockville and surrounding areas.

At Mannix Heating and Cooling, we strive to exceed your expectations with our wide-ranging HVAC services. We specialize in installing high-efficiency HVAC systems designed to save you energy and money. Our skilled technicians have serviced various makes and models, making them adept at swiftly identifying and addressing any HVAC issue you may encounter. Services also include routine maintenance checks, where our team inspects your heating and cooling systems to ensure they are operating at peak efficiency, even during the most demanding seasons.

Mannix Heating and Cooling, Your Reliable HVAC Contractor

As a trusted HVAC contractor in Rockville, Mannix Heating and Cooling takes pride in our team’s consistent professionalism and exceptional craftsmanship. With our dedication to customer satisfaction and service excellence, we promise nothing short of expert and reliable HVAC services. Our knowledgeable technicians stay updated on the latest equipment, technology, and techniques in the industry, ensuring they provide the best service possible for your heating and cooling requirements.

We understand that HVAC issues can arise unexpectedly, which is why our lines are open for emergency services 24/7. Whether it’s a freezing winter night or a sweltering summer afternoon, our team is ready to deliver prompt and efficient service when you need it most. Mannix Heating and Cooling also offers a range of HVAC solutions, including energy-efficient air conditioners, heat pumps, and furnaces that adhere to the highest standards of quality and durability. Our commitment is to help our clients in Rockville maximize their indoor comfort while minimizing their energy costs.

Your Satisfaction, Our Priority

At Mannix Heating and Cooling, our clients’ satisfaction is our utmost priority. Rest assured that our team will take the time to understand your specific needs, discuss your options, and recommend the most suitable HVAC solutions. We believe in transparent and fair pricing, providing detailed estimates without hidden costs or fees. When you choose Mannix Heating and Cooling for your HVAC needs in Rockville, you’re choosing a reliable contractor dedicated to maintaining your comfort and peace of mind.

In conclusion, Mannix Heating and Cooling is your one-stop-shop for all your heating and cooling needs in Rockville, MD. We offer exceptional HVAC services, dependable solutions, and a team that puts you, the client, at the heart of everything we do. Choose Mannix Heating and Cooling for a warmer winter, a cooler summer, and year-round comfort assurance.

We’re in Your Neighborhood

Whether you’re in Gaithersburg, MD, Chantilly, VA, or Treasure Island, FL, our local teams are ready with 24-hour answering service and experienced technicians who keep your systems running when you need them most.

Gaithersburg, MD

7824 Beechcraft Ave
Gaithersburg, MD, 20879
(301) 260-6000

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Chantilly, VA

26955 Gum Spring Road
Chantilly, VA, 20152
(703) 777-9211

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Treasure Island, FL

10625 1st Street E. Suite 200
Treasure Island, FL, 33706
(727) 999-7002

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HVAC Maintenance

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Comprehensive Climate Control Solutions

Our comprehensive approach encompasses everything from routine maintenance to complete system overhauls, ensuring optimal performance throughout every season. We specialize in both residential and commercial applications, understanding that each environment presents unique challenges requiring customized solutions.

Mannix Rewards

Receive up to $100 Mannix Heating & Cooling Visa® Prepaid Card

Customer Referral Program

Customer Reviews
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...
Gary Hendricks Leave a Review
Customer Reviews
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...
Customer Reviews
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...
Rachel Craft Leave a Review
Customer Reviews
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...
Shondra J ones Leave a Review
Customer Reviews
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,...
Patricia Ryan Leave a Review
Customer Reviews
Mannix has always been professional from service calls to repairs and replacements. The technicians are always polite and knowledgeable. They consistently exceed our expectations.
Wendy Collins Leave a Review
Customer Reviews
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...
Philip Slingerland Leave a Review
Customer Reviews
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!
Customer Reviews
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...
Lynne Wilson Leave a Review
Customer Reviews
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...
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