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

With a firm footing in the HVAC industry, our concentrates lie in creating comforting spaces with our state-of-the-art heating systems. And beyond installation, our relationship with our clients extends to the ongoing maintenance and replacements whenever necessary, ensuring you remain shielded from the Virginia chills.

We understand that a proper heating system is more than a mere amenity. It is a necessity, particularly during the frosty winters here in Leesburg. As such, our team of highly trained and certified technicians takes a great deal of pride in offering comprehensive heating installation services. We get it right the first time, installing reliable and energy-efficient systems tailored to individual client specifications. Our installation services are detailed and thorough, covering an extensive range of heating systems, including furnaces, boilers, heat pumps, and radiant heating systems.

Heating System Replacement Experts, Mannix Heating and Cooling

Like any other household installations, your heating system will eventually lapse into its twilight years. When this happens, system malfunctions become frequent, the energy consumption shoots up, and in worse cases, inevitable breakdowns transpire. Instead of allowing this to disrupt the comfort and serenity of your home, our technicians at Mannix Heating and Cooling step in to replace your heating system.

We not only replace your outdated or ineffective system but we also guide you in selecting a new system that is most suitable to your home and lifestyle. In Leesburg, VA, we take the time to apprehend your needs and priorities, your budget, the size of your living quarters, and even factors such as noise levels before presenting you with the best replacement options. We modernize your home heating with a focus on efficiency and convenience.

Our unrivaled expertise and dedication set us apart. Our technicians are continuously learning and adapting to the industry’s new technologies and methodologies, which enables them to provide impeccable services every time. As we navigate the complexities of HVAC installations and replacements, our goal remains to ensure our clients’ ultimate satisfaction. We believe that heating and cooling services should not cause a dent in your bank account; hence, we always work towards providing the most affordable solutions.

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
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
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
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
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
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
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
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 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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