"Comfort" Thermostat vs Standard

[TWG1572]

I was reading an older post in this forum about someone mentioning that their heating bill went up after they installed a new thermostat. IIRC it was a Honeywell 8000 series.

Anyway... someone responded that it was a "comfort thermostat" so utility bills might go up... everyone else responding pretty much nodded their head in agreement, but I never got a sense for why that was.

Why the difference? Do these thermostats run the HVAC more frequently, or what drives the costs? How would one tell the difference between the different thermostat types?

Thanks!

[second opinion]

I was reading an older post in this forum about someone mentioning that their heating bill went up after they installed a new thermostat. IIRC it was a Honeywell 8000 series.

Anyway... someone responded that it was a "comfort thermostat" so utility bills might go up... everyone else responding pretty much nodded their head in agreement, but I never got a sense for why that was.

Why the difference? Do these thermostats run the HVAC more frequently, or what drives the costs? How would one tell the difference between the different thermostat types?

Thanks!

What type of system do you have?

[TWG1572]

I have a single stage heat/cool system with your basic programmable honeywell thermostats circa 2000. Two zones controlled by an Aprilaire board.

Just bought the house, plan on getting a contractor out at some point to do a review. I'm more curious than anything at this point though, just trying to inform myself on different features that may be available.

[udarrell]

If it is a Honeywell Prestige HD YTHX9321R5003 Deluxe Comfort Thermostat System Kit, a drop of only one degree below the setpoint cycles the heating system.

If there is no other temp differential settings that could lead to inefficient short & frequent runtime cycles.

I want a t-stat that allows me to set the on/off temp-differential up to a 4-F swing, so I can adjust it to get the on/off frequencies & the length of runtime within my preferable prescribed perimeters.

To be sure of what you have, look-up & Check the precise specifications of the room t-stat you have...