Expedited Rulemaking for Submerged Closed Loop Heat Exchangers

Revisor’s ID: R-4953 

Minnesota Statutes, chapter 103I authorized the commissioner to adopt rules “to implement requirements for the permitting and installation of Submerged Closed Loop Heat Exchangers…” The Minnesota Department of Health was also authorized to amend these adopted rules using an expedited process. During this expedited process, MDH is required to consider possible revisions to screen configurations and isolation distances for water-supply wells used in Submerged Closed Loop Heat Exchanger (SCLHE) systems. 

A submerged closed loop heat exchanger must not be installed without a permit granted by the commissioner.

On this page:
Comment period
Procedural documents
Proposed draft rule language
Advisory Committee
Rulemaking contacts

Comment period

The comment period opened on December 22, 2025, to January 30, 2026, when the Notice of Intent to Adopt the expedited rules was published in the State Register. No comments related to SCLHE were received during the comment period. 

Procedural documents

• Order on Review of Rules, Court of Administrative Hearings 22-9000-41378 (PDF)
• Notice of Intent to Adopt without a Hearing, published in State Register on December 22, 2025:
  Minnesota State Register, Volume 50, Number 25, Page 601 (PDF)
   
• Notice of Intent to Adopt Expedited Rules without a Public Hearing: 
  Proposed Amendments to Submerged Closed Loop Heat Exchangers, Minnesota Rules, chapter 4725 (PDF)

Proposed draft rule language

• Adopted Expedited Permanent Rules Governing Submerged Closed Loop Heat Exchange System, with modifications 03/18/2026 (PDF) | MN Revisor's Office
• Proposed Expedited Permanent Rules Governing Submerged Closed Loop Heat Exchange System, 12/15/2025 (PDF) | MN Revisor's Office

Advisory Committee

Meeting agendas and minutes

• Advisory Committee Minutes 11/12/2025 (PDF)
• Advisory Committee Minutes 10/22/2025 (PDF)
• Advisory Committee Agenda 09/23/2025 (PDF)
• Advisory Committee Minutes 09/23/2025 (PDF)
• Advisory Committee Agenda 06/02/2025 (PDF)
• Advisory Committee Minutes 06/02/2025 (PDF)
• Advisory Committee Agenda 05/12/2025 (PDF)
• Advisory Committee Minutes 05/12/2025 (PDF)
• Advisory Committee Agenda 04/14/2025 (PDF)
• Advisory Committee Minutes 04/14/2025 (PDF)
• Advisory Committee Agenda 04/03/2025 (PDF)
• Advisory Committee Minutes 04/03/2025 (PDF)
• Advisory Committee Agenda 03/20/2025 (PDF)
• Advisory Committee Minutes 03/20/2025 (PDF)

Rulemaking contacts

Questions regarding the rulemaking process or the revised rules may be directed to:

Avery Guertin or Jon Olson
wellrules.mdh@state.mn.us
651-201-4600 or 800-393-9808