Washington Looks to Us for Geothermal Heating & Cooling! We're E & D Company HVAC LLC. And we're recognized throughout Washington, Pennsylvania, for our geothermal heating and cooling knowledge. Homeowners look to us for ... first-class geothermal system installation and service experienced, highly trained personnel who understand every aspect of geothermal heating and cooling - and know how to help you understand geothermal systems from one of the industry's most established names - WaterFurnace advice on how to get the most from their geothermal heating and cooling installation Obviously, a big reason people look to us to begin with is for the savings they can realize on their energy bills with a geothermal system. Want a snap shot? Give our Geothermal Savings Calculator a go. Then take the next step and contact E & D Company HVAC LLC. We'll walk you through more of what makes geothermal systems the optimum choice for year-round heating and cooling comfort in Washington.