WaterFurnace’s 5 Series 500W11 single hydronic heat pump is an upgrade to the Envision NSW unit. It features Aurora base-communicating controls with optional advanced controls, performance monitoring, and performance and refrigeration monitoring. All fault conditions are monitored by the controller. Scroll compressors, R-410A refrigerant and oversized heat exchangers combine to provide the hydronic heat pump with an energy efficiency ratio of 14.0 to 17.5 and a 2.9 to 3.1 coefficient of performance, depending on the model. The unit features a wide range of operating temperatures, compact size, and reversible control box and piping.