• Patented interview based programming and installer setup.
• RedLINK™ wireless communication.
• Increase profit per job by including RedLINK™ accessories that provide comfort and convenience. RedLINK™ accessories include the RedLINK™ Internet Gateway, Portable Comfort Control (PCC), Wireless Outdoor Sensor, Wireless Indoor Sensor, TrueSTEAM™ humidifier with Wireless Adapter and TrueZONE® zoning panel with Wireless Adapter.
• Configurable for residential and light commercial applications. Meets commercial code and is title 24 compliant.
• Light commercial - commercial language (occupied and unoccupied), schedule holidays and custom events, remote setback, economizer and time of day.
• Alerts and User Interactions Log - Keeps a searchable history of alerts and setting changes to the thermostat to determine if there is a system malfunction or if the issue was caused by user error. Saves time in troubleshooting and points the technician in the right direction.
• Customizable Service Reminders allow dealers to remind their customers when its time to call for service, when their warranty is expiring and to provide customized alerts.
• USB port for transferring Installer Setup, Customizable Reminders, Custom Events and Holidays to multiple thermostats.
• 2 assignable outputs to control humidification, dehumidification, ventilation and a stage of heating or cooling. (3 outputs for THX9421)
• Precise Temperature Control (± 1°F) for reliable and consistent temperature.
• Multiple staging options to provide comfort or energy savings.

Additional features for THX9421:

• Control heating, cooling and IAQ equipment. Heating, cooling and IAQ equipment wires to the Equipment Interface Module.
• Delta T Alerts and Diagnostics informs customers when their system is not operating as expected with instructions to contact the dealer.