Best setup for cape cod
I am trying to figure out the best thermostat settings to get the best results from heating units, I have a cape cod 3 levels each 1800 sq ft. the basement and 1st floor run on a Trane 14 seer 3 ton heat pump with gas back up and the 2nd floor runs on a 12 seer 3 ton heat pump located in ceiling. My question to you is what would be the best settings to get the most efficient and economical use of units, when is there a time when I should set the main floor to run straight off of gas at night it gets down to 20s to 30s now. What should the upstairs be set to work right should thermostats be set alike or should one be higher than the other. Please advise me the best way to go to get the best results.