Exhaust-Only Ventilation Exhaust-only ventilation is the reverse of supply-only ventilation; stale air leaves the building from a known location (through exhaust fans ducted to the outdoors) and outdoor air enters the building from an unknown location.
In the 1960s, the Soviet Union began to prepare the Warsaw Pact for its internal function of keeping the NSWP member states within the alliance. The Soviet Union took a series of steps to transform the Warsaw Pact into its intra-alliance intervention force.
The treaty called on the member states to come to the defense of any member attacked by an outside force and it set up a unified military command under Marshal Ivan S. Konev of the Soviet Union. The introduction to the treaty establishing the Warsaw Pact indicated the reason for its existence.