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Honeywell THX9421R5013
Prestige 2.0 IAQ 2 Wire High Definition Touchscreen, 4 Stage Heat / 2 Stage Cool, Digital Thermostat

Product has been discontinued.
Please call us for a suitable alternate product.

Mon - Fri 8:30am - 5:00pm Central

The Prestige™ 2.0 IAQ HD (High Definition) Touchscreen Thermostat is a full color, high definition, touchscreen thermostat that provides control of 24Vac of heating and cooling systems.  This thermostat requires only two wires and is RedLINK™ enabled to work with compatible wireless accessories.


  • Controls multistage equipment, humidification, dehumidification and ventilation all with only 2 wires at the thermostat location 
  • Large, easy-to-read backlit full color display shows current indoor temperature and humidity, temperature setting, date and time on the home screen. Also displays outdoor temperature and humidity on home screen (if wireless outdoor sensor is installed)
  • Adjustable backlight level allows thermostat to be on full brightness at all times or dim to the brightness level of choice when the thermostat is not being used
  • Interview-Based Programming wizard to easily and confidently schedule thermostat temperatures and times
  • USB Port allows downloading of installer settings to quickly and consistently perform setup of thermostats in similar applications
  • USB Port also allows easy setup of dealer logo and contact information on thermostat screen
  • Real-Time Clock keeps time during power failure; automatically updates for daylight saving time
  • Precise Temperature Control (±1 F) for reliable and consistent temperature.
  • Multiple HOLD options allows modification of schedule as needed
  • Change Reminders to inform it is time to replace Air Filter, humidifier pad, ultraviolet bulb or batteries in connected devices
  • RedLINK™ Enabled to communicate with compatible wireless devices


Note:  To function properly, this product must be used with the THM5421R1013 EIM or the THM4000R1000 TrueZONE Wireless Adapter.



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1901 N. Clybourn Avenue
Suite 200
Chicago, IL 60614
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