Multi Stage Digital Programmable Thermostats

A multi stage system can provide more than one stage of heatingor cooling. For example, it may run on low speed during mild outdoortemperatures and on high speed win extreme outdoortemperatures. Moreover, a multi stage system may also provide emergency or auxiliary heat. 

Multi stage digital programmable thermostats basically work the same way as the digital nonprogrammable models but are much more convenient.  Simply program the thermostat to fit your lifestyle and schedule, and you're done!