Geothermal.contractors

Thein Well Company has been drilling water wells and installing geothermal ground loops since its founding in 1893 — more than 130 years of continuous operation across the North Central United States. Operating from multiple locations and serving a six-state region that includes South Dakota, the company specializes in vertical closed-loop geothermal installations for residential and commercial buildings, drawing on over 25 years of specific geothermal loop experience alongside its water well heritage. The geothermal loop process involves drilling a series of vertical borings, inserting U-bend pipe filled with a potable antifreeze solution, and connecting the loop to an indoor heat pump for efficient year-round heating and cooling. Thein Well is a South Dakota Rural Water Association member and holds memberships in the National Groundwater Association, combining deep drilling expertise with groundwater-industry standards on every project. Verified active operator per http://www.theinwell.com + http://www.theinwell.com/geothermal (SD bundle audit 2026-06-02 — Opus QC)