Can I install two thermostats on one furnace/act unit? I will be using one in living room, the other in a hallway
I'd suggest looking for a thermostat that supports remote sensors. I personally own ecobees which support up to 64 wireless sensors per unit. You can decide which of the sensors participate in measuring the average temperature for each time slot of the day. I believe Honeywell offers thermostats that support sensors as well in both the wired and wireless variety.