Ok, so I guess I don't really understand what primary secondary piping is. Can someone give me a simple explanation? How would that be different than what I have?
As for the circulator running, I switched from the SETBACK mode, where the ciruclators run constantly, to the RMSETBACK mode mentioned above, which should at least shut off the circulator during night mode when there is no call for heat. Having done that, however,will that contribute to thermal shock since the water is not constantly circulating?
As for the WWSD, at least so far I am happier having no heat kick in unless it drops below 60 outside. My house seems to stay warm for a while with no heat. It also seems to be easy enough to switch it to a higher temp if and when I want the heat to kick in. I could see wanting it to be higher in spring. There is no problem switching back and forth on an as needed basis, right?