The Honeywell Prestige 2.0 programmable thermostat meets the needs of both residential and light commercial applications with a two-piece design that includes the thermostat and an equipment interface module with RedLINK wireless technology. The unit guides contractors through the system set-up process, allowing them to select “residential” or “commercial” using the installer programming feature. The thermostat works with RedLINK accessories to provide a number of features including humidity control and an indoor air sensor.