A compressor installation with drying device for compressed gas, with the drying device containing a housing with a drying zone and a regeneration zone; where in the housing a drying agent is provided; and where the pressure line includes a heat-exchanger for cooling the compressed gas before it enters the drying zone. A tap-off pipe is connected to the discharge line that is connected to a cooling inlet of the heat-exchanger, while the heat-exchanger further includes a cooling outlet that is connected to the inlet of the regeneration zone, while the outlet of the regeneration zone is connected to the pressure line.