Clarify which geothermal technology is proposed
A building ground-source heat pump is not the same as a utility-scale geothermal generating plant. Define whether the project provides space conditioning, hot water or another service. Ask a qualified designer to assess the building’s loads and available site conditions. Avoid assuming an existing heating system can be replaced on a one-for-one basis without distribution or service changes.
Request a design with testable assumptions
Review heating and cooling loads, loop design, equipment performance, backup requirements and maintenance access. Ask how the proposal addresses local design conditions and seasonal performance. A single advertised efficiency value is not a complete annual operating model. For a business, incorporate actual occupancy and process requirements rather than a household example.
Compare total costs and utility effects
Include installation, site work, distribution changes, maintenance and any electrical upgrade. Evaluate changes in electric demand as well as energy consumption. If gas service remains for other uses, its fixed charges may continue. Model prices and useful output consistently. Keep an equipment estimate separate from a supplier quote so a procurement saving is not counted twice.
Verify assistance and measure operation
Check current tax and program requirements with authoritative sources and qualified advisers. Do not assume a historical credit remains available for the proposed timing. After installation, retain commissioning information and monitor energy use over suitable periods. Any claim of actual savings should account for weather, occupancy and operating changes rather than repeat an installer’s estimate as a measured result.
A practical example
Illustrative explanation, not a customer outcome.
A hypothetical project that reduces gas use but increases electricity use needs both changes in the operating model. Comparing only the lower gas bill omits a potentially material cost, including any new electric demand charge.
Put the review into practice
| Review step | What to record |
|---|---|
| Establish the baseline | Measure quantities and record operating conditions before the change. |
| Confirm suitability | Use qualified technical advice and compatible equipment. |
| Verify assistance | Check current program rules and approval before budgeting a benefit. |
| Measure carefully | Separate estimates from observed results and account for other changes. |
Questions worth asking
Is geothermal always economical?
No. Site conditions, design and full installed and operating costs determine suitability.
Can the fuel converter size a heat pump?
No. Unit conversion does not replace an engineering load calculation.
Continue the comparison
Sources and scope
Reviewed October 15, 2026. Follow the source’s own data period, effective dates and current terms. Examples are hypothetical unless expressly identified as a dated published result. A source is context, not a guarantee of eligibility or a product endorsement.