I live in Arlington, Texas and just had a Infinity 80 furnace (Model 58CVA110) installed on December 3, 2010. I kept my old coils and outdoor condenser unit. I do have the Carrier Infinity thermostat.
Since the furnace has been installed, it's within easy earshot in the garage and it seems the only speed the thermostat chooses is high speed. I understand I can dictate the fan speed by choice, but I wondered, in some circumstances, if the variable speed should be chosen by the thermostat. Or is that only for complete systems which have the Infinity coils and condenser (which also makes the outdoor thermometer reading available)?
Also, with this setup, am I getting any value out of the two-stage heat for efficiency?
Finally, does anyone know if the Inifinity Termostat/Controller has any feature which would display how long the unit has run over a period of time which could be reset (say on the day of my meter reading each month). That seems like it would be an extremely easy thing for Carrier to provide in such an intricate Thermostat as the Infinity's. Anyone know by chance?