History of Company

Incorporated in 1991, Ground Loop Heating and Air Conditioning Inc. is one of the oldest and most well-established geothermal companies in the state of Maryland. Back in the 1980s, our grandfather installed geothermal systems alongside our father long before most HVAC technicians were learning about the technology. As a family-owned business benefiting from 3 generations of experience, we’ve installed more than 5,000 systems and we’ve earned the distinction of being in 2015 the largest single location dealer of residential WaterFurnace products in the country. Although we install top-of-the-line geothermal systems, we’re able to offer competitive pricing thanks to our extensive industry relationships and high volume. With our A+ rating from the BBB, you can trust that we’ll put your needs first.

Unlike many other installers of geothermal HVAC solutions, geothermal systems are our specialty. This means you can trust that we have the skills needed to professionally install the right system for your needs.

Ground Loop custom-designs loop systems of all sizes for residential, commercial, and industrial applications. Our company has IGSHPA and LEED-certified installers on staff to ensure delivery of the highest quality work. Our team of professionals are trained and certified in pipe fusion, loop installation, equipment installation, and excavation safety, and we’ve also earned certifications from WaterFurnace as a GeoPro Master Dealer, so our experience and credentials far exceed the competition.

Ground Loop is familiar with the requirements of general contractors and will coordinate with project managers, architects, designers, site managers and other sub contractors to facilitate a smooth installation process. We’ll go above and beyond to ensure that the installation process is minimally disruptive to your life and we will always be available to answer any questions you may have.

Ground Loop Staff

Having an exceptional staff at Ground Loop allows us to cater to exactly what our customers need. We help in all aspects of the decision-making process, including payment plans, referrals for out-of-area business, ongoing maintenance, and much more. Our core values as a company are to complete our work in a timely and efficient manner and ensure that our customers love the final product in their home or business. Please read on to get to know our company staff a little better.

Michael Cullum, President of Ground Loop Heating and Air Conditioning Inc

Michael Cullum Company President

Mike is one of the most knowledgeable and highly respected members of the geothermal community. His reputation of quality combined with his 30 years of experience make him one of the top installers in the country. Mike oversees all jobs performed by Ground Loop and works closely with our project and sales manager. He is a licensed contractor and IGSHPA-Certified Geothermal Installer. He designs and installs geothermal systems that have been customized to best fit the needs of your residential or commercial job. Mike has worked exclusively with geothermal for the past 30 years. He is also highly experienced with radiant floor in several different installation methods, including geothermal, boilers, Gyp-Crete, track, concrete, and more.

Jason Cullum Vice President

Living all his life in a house with geothermal heating and cooling, Jason understands all of the advantages and exactly what can be expected from installing a geothermal heating and cooling system. He is currently finishing his Engineering degree from York College of Pennsylvania, which he utilizes in his duties of running the day-to-day operations of Ground Loop, including meeting with customers, completing home evaluations, designing loop systems, and managing the installation process. He is an IGSHPA-certified geothermal inspector and has received factory training in service installation and ground heat exchangers.

Ted Evans Sales Manager

After 20 years of extensive field work in the HVAC industry, Ted assumed a sales and project management position at Ground Loop. His knowledge and understanding of all heating and cooling methods allow him to truly understand and explain the benefits of geothermal systems. His main responsibilities are to meet with prospective customers to educate them on the benefits of geothermal heating and cooling, evaluate their specific situation, and identify which system will work best for their needs. Ted is extremely knowledgeable and has a very practical and laid-back approach to the sales process.

Joe Heaps Lead Mechanic

Joe Heaps is Ground Loop’s lead mechanic for installing new geo systems. Joe has been installing geothermal systems with Ground Loop for the past 25 yrs. He is extremely knowledgeable on how to make your system perform at optimum efficiency.


Our installers may be the ones with whom you’re most familiar. These crews come to your home or job site and actually lay the loops in the ground and tie in the units. These are dedicated and professional individuals who are there to get the job done and are available to answer on-site questions as needed.

If you’re considering investing in a geothermal system, trust your project to the experts at Ground Loop. Give us a call at (410) 836-1706 to learn more about how we can make your home more comfortable and energy-efficient than ever and to schedule your free estimate.

Ground Loop provides geothermal air conditioning system installation and air conditioning system maintenance services to clients throughout Maryland, including Baltimore, Harford County, Anne Arundel County, Howard County, Baltimore County, Cecil County, Carroll County, Montgomery County, PG County, Kent County, and Queen Anne’s County.

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