We're the Geothermal Source in Ligonier! Ligonier residents in the know look to E & D Company HVAC LLC for all their geothermal heating and cooling needs. They place their confidence in us to provide not only the correct installation and service but also the insight to help them get the most from their geothermal systems. Thinking about a geothermal system of your own? Give our nifty little Geothermal Savings Calculator a whirl. Just fill-in your data and marvel at the results. Then, contact us, the Ligonier, Pennsylvania, geothermal experts at E & D Company HVAC LLC.