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Proudly Serving Frederick, MD

Founded in 2016, Markool Heating & Cooling is the name to trust when it comes to heating and air conditioning in Frederick, MD, and the surrounding areas.

A Message from Markool:

2023 Carrier President's Award
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Heating & Air Conditioning

We hold more than 20 years of experience in the industry, and our team is extensively trained. We're big enough to meet your needs, but small enough to bring that personal touch to our services. Whether it's heating and cooling for your home or business, indoor air quality, or another one of our top-rated services, you can always expect the best from Markool Heating & Cooling.

Comfort With A Personal Touch

From our professional team and great Carrier products to free estimates and competitive pricing, we design our full suite of services to earn your complete satisfaction. We have extensive experience with a wide range of both residential and commercial heating, air conditioning, and air quality services. If you're interested in maintaining or improving the comfort and efficiency you enjoy indoors, we're the right team for the job.

Heating & Cooling

Indoor Air Quality

  • Air Purifiers
  • Air Scrubbers
  • Humidifiers & Dehumidifers
  • UV Lights
  • VRF/ERV Systems

Commercial Services

  • Property Management
  • Remodels
  • Refrigeration
  • Maintenance

Unrivaled Heating And Cooling In Frederick

Our highly skilled technicians are NATE-certified and more than capable of addressing any of your heating and cooling needs. We are available 24/7 for emergency services, and will always show up quickly to assist you. As a Carrier Factory Authorized Dealer, we have access to some of the best training and products available to ensure you get the most value from our team. From routine maintenance to repairs and complete system installations, you're always in good hands with Markool Heating & Cooling. Count on our team for all of your heating and air conditioning needs.

The Best in Local Heating & Air Conditioning

At Markool Heating & Cooling, we believe it is a privilege to assist you in making your Frederick homes and businesses as comfortable as possible. We always strive to provide you with the best possible service and products and will do whatever it takes to earn your trust and satisfaction. Our team also believes in giving back and proudly donates to Ducks Unlimited. We are an ACCA member in good standing and routinely undergo training to stay current with the industry and offer you the latest in comfort technologies. Throughout the Maryland seasons, we have what it takes to ensure your indoor environment is perfectly tailored to your needs.

What Our Customers Say

Luke was super friendly and helpful. He replaced our capacitor in 10 minutes and had our AC working in no time. I would highly recommend using this company and their employees.
Benjamin E.
The Markool Heating & Cooling team did an excellent job with my system check up. Highly recommend the maintenance plan to make sure your system is always running at peak efficiency!
K & D
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