A variety of threads here have said that the CPH for both a HP and the auxiliary fossil fuel backup should not be set too high with 3 and 4 CPH being bandied about as good places to be.
I have a few questions about CPH:
- One of the reasons stated is efficiency, that the system is more efficient when it runs continuously. If that is the case, why have multiple cycles in the first place? In the old days, a thermostat was essentially a switch that turned the heat on until the T-stat was satisfied.....it didn't cycle at all, right?
- How long is an "off" cycle? Does the system just cycle down very briefly, or are the off cycles as lengthy as the on cycles?
- With the IAQ, one can set a different CPH for each heat/cooling stage; are there advantages to having a different setting for different heating stages? (I have 2 stages of HP, 2 of aux. head [fossil])