NORDIC® DXW Series - Direct Expansion - to - Water

 The DXW-Series unit is a high efficiency two stage hydronic direct expansion (DX) heat pump with R410a refrigerant. It extracts and rejects heat from the earth via direct contact with copper loops, eliminating the need for a secondary heat exchanger and associated components. Direct expansion units require less “loop” per ton and are more efficient than conventional ground loop systems. The reduced thermal resistance between the earth and the refrigerant circuit provides better heat transfer, resulting in a higher suction pressure and increased output. The unit has several key features that are described in the specifications document for the particular heat pump.