WaterFurnace’s 5 Series 504W11 hydronic geothermal heat pump features patent-pending OptiHeat vapor injection technology that creates exiting water temperatures up to 150° F. The units can operate in heating-only or heating/cooling modes. Copeland scroll compressors — double-isolation-mounted for quiet operation — combine with R410-A refrigerant and an extra heat exchanger to provide efficiency, reliability and energy savings. Its cabinet is fabricated from heavy-gauge steel and features a professional-grade textured finish. Control panels can be placed on either end, which allows piping to be located on the front or back.