Featuring high EER — up to 22.2 at full load and 29.8 in part load — SmartSource™ water-source heat pump products offer low noise operation and a wide range of features and options. The electrically commutated motor (ECM) is a standard feature across the entire product line with multiple, field-selectable airflow settings. These settings provide a wider airflow operating range for different applications and duct systems for better comfort. The heat pumps have published sound ratings as low as 46 dBa. Sound reduction packages are available for even greater sound attenuation. Three dehumidification options provide better comfort in humid climates by taking advantage of smart airflow management and capacity control. Also available is a desuperheater option that takes advantage of waste heat from the compressor to provide domestic hot water. Other options include coated air coils; dual freezestat settings; and two-way, on-off, water valve control.