About Us

Installing systems since 2005

G.O. Loop LLC was started in 2005 and has been growing steadily ever since. We specialize in closed loop installations and have installed over 2,000 such systems. We will install any loop system from small residential installations up to large scale commercial applications. Our projects involve vertical drilling, directional drilling, trench excavation or pond installation.  We have design software and experience for residential/light commercial loop fields as well as for large commercial projects. For large scale projects, we also have the equipment and knowledge to conduct soil conductivity tests. For a list of commercial projects completed and projects in progress, please see our Commercial page.

Certified and Dependable

Gordy Oosterhouse is the founder of G.O. Loop and has been working with geothermal systems ever since his first installation as an HVAC contractor in 1994. We have been adding staff and equipment and have several employees who have IGSHPA training and certification. IGSHPA stands for International Ground Source Heat Pump Association. This is an association which promotes, educates, and regulates the geothermal industry. We also are members of the Wisconsin Geothermal Association and Wisconsin Builders Association and are accredited with the Better Business Bureau of Wisconsin. We are located in south-central Wisconsin and service the entire state as well as parts of the surrounding area.