I disabled the nightly setback on our thermostat. When its cold like it is, the furnace takes a long, long time to warm the house back up to daytime temperatures. It’s probably more efficient to let the heat run off and on during at night and not so much later rather than running constantly for an extend period while warming the house back up to the schedule temperature. It’s definitely more comfortable. Our home is well insulated. But, it still loses a lot of heat overnight in extremely cold weather. Looking very forward to determining the optimum schedule for the air conditioner when its burning hot this summer.