Category
Geothermal Calculators
Geothermal heat pump sizing and savings calculators.
Geothermal calculators help estimate heat pump size, heating and cooling savings, and payback assumptions for ground-source systems. They are useful before requesting quotes because loop design, load calculation, and incentives can dominate project economics.
Which geothermal calculator should you use first?
Use Geothermal Heat Pump Sizing when you know current heating fuel, annual energy use, or load assumptions. Compare results with contractor Manual J or equivalent load calculations before making equipment decisions.
Common geothermal decisions
- - Estimate heat pump capacity from heating and cooling load assumptions.
- - Compare operating cost against gas, propane, oil, or electric resistance heat.
- - Review federal incentive and project-year caveats.
- - Check whether payback depends more on fuel savings or upfront loop cost.
Assumptions to review
Geothermal estimates depend on building load, climate, ground loop design, equipment COP/EER, current fuel price, electricity rate, ductwork, incentives, and installation cost. Contractor load calculations remain essential.
Data sources and limits
RenewableCalc labels geothermal assumptions around fuel price, electricity rate, efficiency, and incentive status so users can replace defaults with quote-specific and utility-specific data.
Geothermal calculator FAQ
Can a geothermal calculator replace a load calculation?
No. It can screen savings and sizing assumptions, but a contractor load calculation is needed for equipment and loop design.
What drives geothermal payback?
Payback depends on installed cost, loop design, incentives, current fuel cost, electricity rate, and heat pump efficiency.
Is geothermal only for heating?
No. Ground-source heat pumps can provide heating and cooling, and some systems can support domestic hot-water savings.