Patent ID: 7967218

Claim:
In a control system for forced air HVAC systems, said HVAC system having a source of conditioned airflow of certain amount, said control system controlling said source, said control system having a plurality of control zones, each said zone capable of receiving a portion of said source under control of said control system, each said zone capable of calling for conditioning, said control system sending said portion to each calling zone while said calling continues, said control system capable of selecting non-calling zones to receive excess of said conditioned airflow not sent to said calling zones such that the sum of said portions sent to said calling zones and said portions sent to said non-calling zones is equal to or greater than said certain amount, an energy efficient method for selecting said non-calling zones to receive said excess comprising: a. providing a conditioning limit for each said zone; b. determining the occupancy each said zone; c. providing a comfort method for selecting a non-calling unconditioned and occupied said zone within said conditioning limit for receiving said excess; d. providing an energy efficient method for selecting a non-calling unconditioned and unoccupied said zone within said conditioning limit for receiving said excess.