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 thirtieth anniversary of the Warsaw Pact and its renewal make a review of its origins and evolution particularly appropriate. The Warsaw Pact alliance of the East European socialist states is the nominal counterweight to the North Atlantic Treaty Organization (NATO) on the European continent (see fig. A, this Appendix).