From how they work to what they cost, state-by-state incentives, and whether geothermal is right for your home — all in one place.
Learn How It Works → Comprehensive guides · Real data · Expert analysisIn-depth guides, real data, and expert analysis to help you make informed decisions about geothermal heating and cooling.
Understand geothermal heat pumps — the technology, installation process, maintenance, and how they heat and cool your home using the earth's energy.
Find incentives, rebates, tax credits, and installer information specific to your state. Comprehensive guides for all 50 states.
See how geothermal stacks up against traditional HVAC, solar, and other systems. Real cost breakdowns and ROI timelines.
Stay current with geothermal legislation, technology breakthroughs, major projects, and market trends shaping the industry.
Resources for HVAC contractors, installers, and builders — certification guides, business opportunities, and best practices.
How to find, vet, and get real quotes from geothermal contractors in your area — what to ask, what to expect, and how to compare bids.
Geothermal heat pumps use the earth's constant underground temperature to heat and cool your home — dramatically reducing energy costs and environmental impact.
Geothermal systems use 25–50% less electricity than conventional heating and cooling, saving homeowners $1,000–$2,500 annually.
No combustion, no emissions on-site. Geothermal moves heat rather than creates it, using the earth's constant underground temperature.
Indoor components last 25+ years. Ground loops last 50+ years. That's 2–3x longer than conventional HVAC with lower maintenance.
Expert analysis and practical guides — updated regularly.
Heat pump installation cost in 2026: the $12,200 national median, real ranges by system type, the R-454B price bump, and what's left of the tax credit.
Read More →A complete heat pump maintenance guide: monthly DIY tasks, a seasonal schedule, what a pro tune-up includes, real costs, and the EPA 608 DIY boundary.
Read More →Installed geothermal in 2025? Claim the 30% credit on Form 5695 by the Oct 15, 2026 deadline, and carry forward any unused credit. For 2026 installs, it's gone.
Read More →Geothermal Insider is an independent research and publishing project. We don't design systems, sell installations, or take referral fees from contractors — so the only thing we're optimizing for is whether a guide actually helps you make the decision.
Every guide is built from primary sources — federal guidance, state energy office programs, utility documents, and manufacturer specifications. Where a number is uncertain or varies by location, we say so instead of guessing.
How We Research →Claims are sourced to DOE and EPA guidance, state incentive databases, utility program pages, and manufacturer specifications — and linked so you can check them yourself.
Launched March 9, 2026 and growing since — new guides, state incentive changes, and a daily-checked industry news feed, every item linked to its source.
Start with the basics — learn how geothermal heat pumps work and whether they're a good fit for your home or building.
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