The ACU-401-CAP is a self-contained, trailer mounted, Air Conditioning and Ventilating Unit designed for the Air Force to satisfy the requirements of many military fighter aircraft, such as F-15, F-16, F-18 and F-35 (JSF) as well as other applications requiring pre-conditioned air from 3 to 5.5 psig. The 33-ton ACU-401-CAP can be powered by either its own diesel engine generator set or can be connected to utility power for operation. A vertical screw compressor that features a sliding valve for step-less linear capacity control provides the cooling. The ACU-401-CAP has many features providing extreme flexibility in operation and satisfying aircraft requirements throughout a wide range of ambient extremes. The ACU-401-CAP is a high performance machine.