Energy StarEcobee – The Ecobee Smart Thermostat actually pays attention to how you consume energy and figures out how you can save the most energy and money over time.Alliance to Save EnergyGreenhouse Gas Equivalencies CalculatorSolar Panels PlusElectric & Gas Industry AssociationWinslow Pump & Well, Inc – Geothermal Loop Field SpecialistsCarterWorx – Improving Homes since 1985 – professional installation of energy efficient windows, doors, insulation, etc.