We've recently been running a lot of our sites using Siemens "start stop optimisation" which in residential terms is the same as adaptive recovery. SSTO is supposed to look at the paremeters you tell it to look at in order to start the units after night setback and bring the space temps to normal day mode settings by the time they are scheduled to be occupied. I have found that the system does not seem to be "learning" as it should and the units never seem to change their start times to compensate for weather changes. It currently takes an average time of 15 minutes to raise the space temp one degree. Anyone out there have any expierience with SSTO? Is 15 minutes per degree rise a resonable recovery rate? Night setback is about 5 degrees.