Your guide to going geothermal — answers, tools, and listed contractors.
Whether you're researching your first geothermal install or comparing quotes from contractors, the Geothermal Advisor centralizes the tools and information you need to make confident decisions.
What stage are you in?
Sizing a System
Estimate how many tons of geothermal capacity your home needs and what loop length to drill.
Estimating Cost
Get an installed-cost range for your home and state, including drilling, equipment, and labor.
Checking ROI
See your payback period and lifetime savings compared to gas, oil, propane, or electric heat.
Federal & State Incentives
See which state rebates and utility incentives you may still qualify for — the federal §25D residential credit ended December 31, 2025.
Drilling Permits
Check your state's permitting rules for vertical and horizontal loop installs before you commit.
Ready to Get Quotes
Browse IGSHPA-certified installers in your state, or request multiple quotes at once.
Common Questions
- How does a geothermal heat pump actually work?
- Vertical vs horizontal loops — which fits my lot?
- What does IGSHPA certification mean for a contractor?
- How long does a typical geothermal install take?
Ready to talk to a verified installer?
Browse IGSHPA-certified contractors in your state, or request multiple quotes at once.