The #1 Resource for Geothermal Heating and Cooling in Illinois

About Geo

Your own backyard has the potential to be an energy source for heating and cooling comfort. Outdoor air temperatures fluctuate throughout the year with the changing seasons. In contrast, ground temperatures about four to six feet below the Earth’s surface remain relatively moderate and constant all year.

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Geothermal Install/Service Training and Testing to be held on October 18, 2023 in Oakbrook.   

NOTE:  Next Webinar will be held the 3rd Tuesday of the month on October 17th

2:00 – 3:00 pm via Zoom



High-Performance Ground Loops

presented by Robert Jensen/Agreenability

Robert Jensen – Robert Jensen holds degrees in Physics and Engineering and is the president of Agreenability, the manufacturer of the TWISTER high efficiency geothermal heat exchanger. Robert spent his early career working for an HDPE pipe manufacturer giving him deep knowledge of geothermal heat exchange which later led him to invent and develop the TWISTER heat exchanger.
Once registered you will receive a link to the webinar and after the webinar, you’ll receive a link to the recorded session.  There is no charge for members of Geothermal Alliance of Illinois and Iowa Geothermal Association.  A non-member fee is $25.

“Owning a geothermal System has been great.”

I've owned a geothermal system for over 7 years now. It has kept my power bills low while keeping my family comfortable. It operates quietly and efficiently all year round. Owning a geothermal system has been a great experience.
Chris Reynolds


A single piece of equipment heats and cools your home, while providing some or all of your home’s hot water as well. Geothermal systems can save you 30 percent to 70 percent on your monthly utility bills.


 A geothermal system circulates a water-based solution through a buried loop system to take advantage of the Earth’s constant temperatures.


The federal government offers tax credits for homeowners who install a geothermal system on their property.