Licensed or Registered Well Contractor Directory
Ground source heat pumps that use vertical wells must be installed by a contractor who is licensed and bonded by the Minnesota Department of Health (MDH). You must also obtain a permit from MDH before starting the work.
North American Technical Excellence
Search by zip code for heating, ventilation, and air conditioning (HVAC) contractors in your area who employ technicians who have been certified by North American Technician Excellence (NATE).
Pros and Cons of Geothermal Heating and Cooling Systems
This Minnesota Department of Health site gives an overview of the different types of ground source heat pump designs including those with the potential for adverse environmental impacts. Descriptions and references to state requirements for vertical bore ground source heat pump systems are also included.