Welcome to Ground Loop Heating and Air Conditioning, a family-owned business specializing in residential and light commercial, ultra-efficient heating and cooling! Ground Loop is hiring for all field positions! $1,000 sign-on bonus.

Experienced, Dedicated, and Determined

Ground Loop Heating and Air Conditioning, Inc., is the largest and most experienced geothermal heating and cooling installer this side of the Mississippi. We install WaterFurnace geothermal systems and are proud to bring you over 30 years of WaterFurnace geothermal experience. Ground Loop specializes in all things geothermal. Whether it’s a traditional geothermal energy system using vertical, horizontal, or pond loops; geo radiant flooring; or full-time geo domestic hot water; Ground Loop has your answers.

GLH-About

The Story Behind “The First Modern Ground Source Heat Pump!”

Geothermal Heating and Cooling Systems

Traditional Heating, Ventilation, and
Air Conditioning Systems

Geothermal Heating and Cooling Systems

Traditional Heating, Ventilation, and
Air Conditioning Systems

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Let the Ground Heat and Cool Your Home!

Geothermal Heat Pump Maintenance and Ductless System Installation in Jarrettsville, MD

“We have been using Ground Loop for our yearly maintenance on our geothermal system for 6 years. They are thorough and very courteous. Last month we had a ductless a.c. unit installed above our garage in a storage room turned office. They were great to work with! We highly recommend them!”
- Judy K.

I want you to know how extremely impressed I am with the people

“Dear Mr. Cullum, I want you to know how extremely impressed I am with the people I’ve met from Ground Loop from Ted in Sales, to Emilie, Justin who came out to do the initial assessment, Joe the lead man and the two members of the crew who installed the unit. I have had many work crews at my house over the years and none were as professional, courteous, and competent as yours. You can take great pride in the culture of excellence and respect for customers that you have instilled in your team members. They are terrific and I will remain a GREAT fan of Ground Loop.

Most sincerely and gratefully
Mrs. Smith”

Air Conditioning Installation

They are awesome! They did a wonderful job for us and we would refer this company to anyone.

- Laurie M.

Geothermal Heat Pump Repair

We had our neighbor recommend your company for our geothermal repairs. We had the pleasure of Shawn arrive promptly on the morning of August 5, 2020. He was polite and informative. He fixed the problem with our geothermal system very quickly.

Your customer service was wonderful. It was refreshing to talk to an actual person so quickly when I phoned your company. I was very happy with your company from start to finish. My only regret is that I didn’t find your company sooner. However, you have our business in the future.
Regards,
– Corrine C

We Take Pride In Our Work

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Heat Pump & Zone Control System Installation

“Ground Loop Installed a new two speed HP with a zone control and an Aprilaire 5000 air filter. I love it! It’s much more comfortable and I would never go back.”

- Lonnie

Geothermal Heat Pump Installation

“From the initial estimate appointment, through the install, and both maintenance visits they were on time or early. They completely cleaned up at the end of each workday. After 18 months of use, I have no complaints and I’m saving approximately 40% per month on my BGE bill. I highly recommend using Ground Loop for your HVAC work.”

- Angie's List Reviewer

Heat Pump Maintenance

“I had Ground Loop install my system a few years back and have used their maintenance program ever since. My ground loop heating and air system runs great and I love how I save over 40% versus my standard system in my previous home. Ground Loop’s employees are always polite and super knowledgeable. I plan on using their winter & summer maintenance program to ensure my system is always working properly.”

- Matthew E.

Oil Furnace Maintenance in Clarksville, MD

“We used Ground Loop with great results to service the geothermal system in our previous home. We moved to a different place with oil heat that went through a $500 tank every 6 weeks this past winter. I contacted Ground Loop to help figure out why, as this was an open-ended task that required an experienced technician.

They identified a laundry list of items, including some big ones: A large gap in some hidden ductwork that was dumping much of the air into the crawl space, undersized returns and too many closed registers that cause the burner to overheat and cycle off to cool down, they fixed a clogged condensate drain that would likely leak water to the ceiling below, and that the previous owners made the penny-wise decision to install air conditioning instead of a heat pump, so oil is used for all heating.

These defects have been present for decades, and probably cost the previous owners a mint. A $297 investment in their thorough HVAC inspection was well worth it. We will definitely be contacting them when we go geothermal in a year or two.”

- James K.

Geothermal Heat Pump Installation

“The system is very inexpensive to run (the other day it never got above 35 and it only cost $3.89 to operate). I am very happy, and could not recommend these folks more highly. If I had to choose again, I would make the same call.”

- Ian

Geothermal Heat Pump Installation and Maintenance

“From the initial estimate appointment, through the install, and both maintenance visits they were on time or early. They completely cleaned up at the end of each workday. After 18 months of use, I have no complaints and I’m saving approximately 40% per month on my BGE bill. I highly recommend using Ground Loop for your HVAC work.”

- James P.

Geothermal Heat Pump Installation

“The installation went extremely well. Only one day of digging in the yard to install the ground loops. We had two units installed in the house, one in the basement and one in the attic, which took a bit over two weeks. The Ground Loop team members were extremely knowledgeable about their products. They were very courteous and professional. They arrived on time and cleaned up any messes they made. If you want a geothermal system, Ground Loop is the company to call.”

- Angie's List Reviewer

We Take Pride In Our Work

I want you to know how extremely impressed I am with the people

“Dear Mr. Cullum, I want you to know how extremely impressed I am with the people I’ve met from Ground Loop from Ted in Sales, to Emilie, Justin who came out to do the initial assessment, Joe the lead man and the two members of the crew who installed the unit. I have had many work crews at my house over the years and none were as professional, courteous, and competent as yours. You can take great pride in the culture of excellence and respect for customers that you have instilled in your team members. They are terrific and I will remain a GREAT fan of Ground Loop.

Most sincerely and gratefully
Mrs. Smith”

Geothermal Heat Pump Repair

We had our neighbor recommend your company for our geothermal repairs. We had the pleasure of Shawn arrive promptly on the morning of August 5, 2020. He was polite and informative. He fixed the problem with our geothermal system very quickly.

Your customer service was wonderful. It was refreshing to talk to an actual person so quickly when I phoned your company. I was very happy with your company from start to finish. My only regret is that I didn’t find your company sooner. However, you have our business in the future.
Regards,
– Corrine C

Heat Pump & Zone Control System Installation

“Ground Loop Installed a new two speed HP with a zone control and an Aprilaire 5000 air filter. I love it! It’s much more comfortable and I would never go back.”

- Lonnie
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We Install the Best...

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And Service the Rest!

We service all brands.
We service all brands.
We service all brands.

Need Service?

Contact Us Today!

 (410) 836-1706