The goal of optimal stop is to set the zone to the unoccupied mode prior to actual zone vacancy. The OST must do this while the zone is still occupied, without causing comfort level alarms. The Optimal Start object calculates the number of minutes before the zone is scheduled to change from occupied to unoccupied. The OST then uses the same equation (Optimal Start Equation) for deriving the optimal start time to determine the earliest stop time, except for two differences:
To ensure occupancy comfort, the OST sets the Temperature Difference factor to the Temp Differential attribute.
The Deadtime is set to 0.
(Heating or Cooling Constant/100) x (Temperature Difference)2 + Heating or Cooling Deadtime (always = 0) = Optimal Stop Time