A variable volume multizone unit is disclosed for simultaneously supplying variable amounts of cool, warm or neutral air to each zone, as required. The unit is under the overall control of a computer and controls dampers located at the unit to regulate the flow of cool and neutral or warm air to each...http://www.google.com/patents/US4495986?utm_source=gb-gplus-sharePatent US4495986 - Method of operating a variable volume multizone air conditioning unit
