Would you pay a geothermal price for an A/C unit or boiler? Obviously not, but others have. Too often, efficiency claims on heat pump brochures go unrealized because of poor well field design. EWT or "Entering Water Temperature" is what dictates the efficiency and performance of a geothermal system. EWT is the temperature of the water returning from the well field and it is what makes or breaks performance. Simply put, EWT is the lifeblood of a heat pump. An EWT that's too high or low, and your system will perform no better than a conventional system. Or worse - experience total system failure. An EWT that puts you in the "Green Zone" is a function of geological analysis, long term heat load calculation, intelligent design and real time system monitoring of key performance indicators. Geothermal should never make you blue - or red. We have the tools and expertise to put both you and your EWT in the green. Green Zone performance. Isn't it why we do geothermal in the first place?