ELFOEnergy Duct Medium water chillers and heat pumps are indoor units with ducted condensation. Thanks to his special design ELFOEnergy Duct Medium main features are: Versatility: different combinations of inlet and outlet plug fans enable to connect easily the unit to the air ducts and to have high available head; High energy efficiency: ELFOEnergy Duct Medium besides being in Eurovent efficiency class A at full load grants high seasonal power efficiency thanks to the innovative cooling circuit optimized for partial load operation and the DST (Dynamic Supply Temperature) return control logic; Easy installation: the units are very compact and are supplied on request with high efficiency pumps on board; therefore the available space for other purposes is increased and the installations costs are reduced.