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!

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.

Air Conditioner Repair in Forest Hill, MD 21050

“Ground Loop to the rescue! We called on a Sunday because our AC unit had locked up. Jason came to our home the next morning at 8am to take a look at our unit and he had us back up and running within 30 minutes! He was professional, knowledgeable and very responsive to our need for AC, with the summer heat and with a severe asthmatic child in the home. We also knew we needed to upgrade our unit, as our home is older and we have baseboard heating units that are quite costly, to run, in the winter months. After speaking with Jason about our concerns and hearing the pros/cons of replacing just the a/c unit or getting a combo unit (A/C & central heat), we decided to purchase a combo unit and are looking forward to more cost-effective electric bills. We are awaiting the delivery/installation of our new combo unit, but the original unit that Jason came to fix has kept us cool since it was fixed! We cannot recommend Ground Loop enough and will make sure we tell all of our family and friends that this company cannot be beat!”

- Linnea A.

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”

We Take Pride In Our Work

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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

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

“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

Geothermal Heat Pump Installation

We have been customers with Ground Loop since we built our house in 2001. When it was as time to replace the old system, there was no doubt that we would use Groundloop again. Now we have the Water Furnace system, more energy-efficient and trouble-free. We have the semi-annual maintenance service and we are always satisfied with the quality of the technicians’ work and professionalism.

- Dawn V.

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.

We Take Pride In Our Work

Air Conditioner Repair in Forest Hill, MD 21050

“Ground Loop to the rescue! We called on a Sunday because our AC unit had locked up. Jason came to our home the next morning at 8am to take a look at our unit and he had us back up and running within 30 minutes! He was professional, knowledgeable and very responsive to our need for AC, with the summer heat and with a severe asthmatic child in the home. We also knew we needed to upgrade our unit, as our home is older and we have baseboard heating units that are quite costly, to run, in the winter months. After speaking with Jason about our concerns and hearing the pros/cons of replacing just the a/c unit or getting a combo unit (A/C & central heat), we decided to purchase a combo unit and are looking forward to more cost-effective electric bills. We are awaiting the delivery/installation of our new combo unit, but the original unit that Jason came to fix has kept us cool since it was fixed! We cannot recommend Ground Loop enough and will make sure we tell all of our family and friends that this company cannot be beat!”

- Linnea A.

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
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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