​Utilities in several states now own and operate ground heat exchangers as regulated infrastructure. A geothermal thermal network utility business model places the buried heat exchanger on the utility side of the meter. The customer connects to a shared thermal source instead of installing and maintaining the ground heat exchanger (GHX) alone.

Pilot programs in New York, Massachusetts, Colorado, Minnesota, and Illinois have moved past the concept stage. Several are in the ground. Others are in design or regulatory review. Together they have surfaced practical lessons that matter to engineers, contractors, regulators, developers, and educators. Some of those lessons are technical. Many are about process, coordination, and workforce readiness.

Geothermal Thermal Network Utility Business Model: What Early State Pilots Are Actually Testing

Most pilots share a common structure. The utility designs, finances, builds, and maintains the shared GHX. Building owners keep responsibility for the heat pumps and interior distribution. That split sounds simple on a slide. In practice, it creates a new interface that needs definition.

Pilot teams have spent significant effort answering questions like these. Where does utility responsibility end and customer responsibility begin? Who holds the design of record? Who owns the thermal performance data after commissioning? Which personnel respond when a building underperforms, and the GHX is not the cause?

Projects that defined this boundary early moved faster. Projects that left it vague spent months renegotiating scope midstream. The lesson is not complicated. Write the interface down before the drill rig arrives.

Regulatory Clarity Decides the Pace

Enabling legislation gets headlines. Implementation rules decide schedules. Several pilots stalled not because of engineering problems but because regulatory categories had never been written for shared thermal assets.

Recurring regulatory friction points include:

• Asset classification. Regulators had to decide whether a ground heat exchanger qualifies as utility infrastructure under existing statute.
• Service territory rules. Thermal service does not always map cleanly onto electric or gas territory boundaries.
• Permitting jurisdiction. Drilling permits, right-of-way access, and interconnection reviews often sit with different agencies.
• Standards references. Commissions asked which design and installation standards a utility must follow. Pilots that named recognized standards in their filings faced fewer challenges.
• Workforce qualification language. Some dockets required proof that installers held recognized certification.

That last point deserves attention. Regulators increasingly want documented competency, not just contractor references. Licensing and continuing education rules vary widely by state, and the current state licensing and CEU requirements are worth reviewing before any filing. Utilities discovered that credential language shapes bid pools. Contractors discovered that credentials shape access to this work.

Design and Data Discipline Under Utility Ownership

Utility ownership changes the engineering conversation. A single building owner may accept a GHX sized for a 20 year horizon. A utility plans around multi-decade asset life and future connections. That difference shows up in design assumptions.

Pilot experience points to several habits worth adopting. Thermal conductivity testing became non-negotiable rather than optional. Load diversity across connected buildings received far more scrutiny. Teams modeled future customer additions instead of designing only for day one demand. Monitoring hardware went in during construction, not after complaints.

Shared ground heat exchangers also raise the stakes on installation quality. A single fusion joint failure in a district-scale system affects many customers. Documentation, inspection, and installer certification carried more weight than on single-building jobs. Several pilots adopted stricter observation requirements after early field issues. CSA/IGSHPA GSVI (GSHP System Verification & Inspection) certification ensures that the right resources are on site.

Ownership economics also shift when a third party holds the loop. The reasoning behind that shift is explored well in this piece on the value of the ground loop heat exchanger for third-party owners. Long asset life and low maintenance burden make the GHX attractive to entities that plan in decades. Teams working on district-scale configurations will also find useful background in this overview of district systems and thermal energy networks.

Workforce Capacity Is the Real Constraint

Ask pilot managers what nearly derailed their schedule. Few say technology. Most say people.

Qualified drillers, GHX installers, and design engineers are in short supply in many pilot regions. Utilities found limited bidder pools. Some pilots waited on rig availability. Others delayed commissioning while searching for certified technicians who could verify flow, purge, and pressure test results.

Trade schools and technical colleges have started responding, but curriculum development takes time. Utilities that partnered with local training providers early built a pipeline they could actually draw from. Those that assumed a market would appear on demand were disappointed.

The pattern is clear across every pilot state. Policy can authorize a project. Only trained professionals can build it correctly.

Geothermal Thermal Network Utility Business Model: Ready for the Next Wave of Pilots?

If you work in this space, the trend is already at your door. More states are drafting thermal network legislation. More utilities are preparing filings. You will be asked to design, install, inspect, or approve these systems soon. Your credentials and your team's field competence will determine whether you are in the bid pool.

IGSHPA training gives you the standards-based grounding that regulators and utilities now expect. Our certification tracks cover GHX design, installation, and inspection at the precision these shared assets demand. IGSHPA membership connects you with the utilities, manufacturers, engineers, and educators shaping these programs right now. Our annual conference is where pilot teams share what worked and what did not, before those lessons reach print.

Explore IGSHPA training and certification today and get your team qualified before the next round of utility pilots opens for bid. Send us a message to get started.