Northern GroundSource Inc

Northern GroundSource Inc has operated from Brimson since 2001, making it the longest-established geothermal contractor serving Northern Minnesota and Wisconsin. The company holds NATE certification for both residential and commercial GHEX GSHP system design, and maintains a perfect 5.0-star rating from three verified client reviews. Their coverage area includes Brimson, Duluth, and Superior, with specialized expertise in cold-climate geothermal installations that perform reliably in harsh Northland winters.

What differentiates Northern GroundSource is their exclusive focus on geothermal design consulting rather than general HVAC work. They pair ColdClimate technology from TETCO ENERTECH with equipment options from BOSCH and Hydron Module, giving clients multiple manufacturer choices backed by 96-100% geothermal comfort guarantees. Their free consumer flier, endorsed by the Minnesota Geothermal Heat Pump Association, helps homeowners verify contractor credentials before signing.

Client testimonials highlight specific outcomes: Diana Lieffring's 3600-square-foot home runs on just 670 dollars annually for both heating and cooling. Andrew Ross personally recommends Garret, describing him as the most knowledgeable geothermal professional in the northland. Brent Larson's review confirms the company's reputation as the region's most trusted geothermal specialist. These real results demonstrate why Northern GroundSource has completed several hundred successful installations since 2001.