The Variable-Speed Water–to–Water (WV) system is the first geothermal heat pump to provide in-floor radiant heating, forced air heating and cooling, and 100% of the home’s domestic hot water in one compact, efficient package. The variable-speed water–to–water can cut your heating and cooling bill by over 30 percent when compared to a standard geothermal system, which means up to 80 percent savings over a traditional HVAC unit. Our EPIC connected controls come standard on all new units.