A cooling system for cooling a housing of a turbo-machine comprising a feeder air line connected to the feeder air connection of the housing, a waste air line connected to the waste air connection of the housing, a recirculating air line, a fan position in the feeder air line, and means for changing feeder air temperature including a controller to control the air flow in the air lines. Thus, the source gas is supplied in the full presence of plasma particles contributing to film formation. For example, unencrypted network, WEP encrypted network requiring a WEP key, WPA encrypted network requiring a pre-shared key, an IEEE 802.