... , Free cooling box, free air, free cooling unit FUNCTIONFCB-03D is a compact free air cooler, specifically designed to control ... optimum performance and to maximize component life..STANDARD FEATURES CabinetFCB-03D is a compact free air cooler complete with filter, ... in clear text.Self test function.TECHNICAL DATA VersionUnitFCB-03D-01FCB-03D-02Maximum air flowm³/h27902450Cooling capacity at t=4°CkW3 ...