New England's Trusted Geothermal Experts
Professional Geothermal Drilling Since 1997
A division of T.J. Ogden Co. — Over 42 years of collective borehole technology experience. Licensed drillers, HDPE Fusion certified, IGSHPA accredited.
Why Geothermal?
The Smart Choice for New England Homes & Businesses
Up to 70% Energy Savings
Dramatically reduce heating and cooling costs by harnessing the earth's constant underground temperature.
Zero Direct Emissions
No combustion, no fossil fuels burned on-site. The cleanest HVAC technology available today.
Perfect for New England
Uses the constant 55°F underground temperature — performs efficiently even in the harshest winters.
50+ Year Lifespan
Ground loops last 50+ years, indoor units last 25+ years — far outlasting conventional HVAC systems.
Our Process
From Assessment to Commissioning
Our streamlined five-step process ensures your geothermal project is completed on time and to the highest standards.
Site Assessment
Evaluate geology and heating/cooling requirements
System Design
Custom borefield layout and specification
Drilling & Installation
Licensed crews drill and install ground loops
Connection & Grouting
Connect heat pump, grout boreholes
Testing & Commissioning
Pressure test, flow balance, verification
Our Work
Trusted by Leading Institutions
From Harvard University to private residences, GDNE delivers reliable geothermal solutions.
Harvard University
Nichols College
Regional Medical Center
Ready to Switch to Geothermal?
Get a free, no-obligation site assessment and estimate from New England's trusted geothermal drilling experts.