Some utilities offer rebates for "commercial" thermostats. Their idea of commercial depends on what they want the thermostat to do. You would have to check with them to find out their criteria and see if the stat meets it. If it is just your definition it only matters as far as the equipment is concerned.
Honeywell does classify the T7300 series as a commercial stat with sub bases and accessories as needed.
Proud supporter of Springfield Millers and Oregon Ducks.
we use them for both residential and commercial, put it in a com building its commercial, put it in someones house it is residential. as long as it properly controls the unit you are good to go...good luck...