Contractors, home and building owners choose Honeywell for many reasons. For you, reliability, application flexibility and install ease stand out. For your customers, easy use, accuracy and design make Honeywell the most trusted thermostat name.

Features & Benefits

• Control Heating, Cooling and IAQ Equipment with Only 2-Wires at the Thermostat
• Heating, Cooling and IAQ Equipment Wires to the Equipment Interface Module
• Smart Schedule - Programs in Seconds for any Lifestyle
• 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, Wireless Entry/Exit Remote, Wireless Vent and Filter Boost Remote, TrueSteam™ Humidifier with Wireless Adapter and TrueZone® Zoning Panel with Wireless Adapter
• Selectable for Residential and Light Commercial Applications
• Light Commercial - Commercial Language (Occupied and Unoccupied), Schedule Holidays and Custom Events, Remote Setback, Economizer and Time of Day
• Delta T Alerts and Diagnostics Informs Customers When their System is Not Performing as Expected with Instructions to Contact the Deale
• Provides a Sense of Security and Greater Comfort While Generating Repeat Business
• All Prestige® IAQ Kits Come Standard with a Return and Discharge Air Temperature Sensor to Measure Delta T 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
• Performance Logs - Keeps a History of Heating and Cooling Performance
• The Performance Log Includes Minimum and Maximum Delta T, Minimum and Maximum Discharge Temperature, Minimum and Maximum Return Temperature, Minimum and Maximum Indoor Temperature/Humidity, Minimum and Maximum Outdoor Temperature/Humidity and Run Time
• Quickly Determine If the System is Performing as Expected and Reduces Service Time on the Job
• 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
• USB Port for Adding the Dealer's Full Color Business Logo on the Screen
• 3 Assignable Outputs to Control Humidification, Dehumidification, Ventilation and a Stage of Heating/Cooling
• 4 Assignable Inputs on the Equipment Interface Module Can be Used with Wired Outdoor, Indoor or Discharge Sensors, Occupancy Sensor for Remote Setback and Dry Contact Devices to Trip Pre-Packaged or Custom Alerts Such as a Full Drain Pan or Water Leak
• Extend Wireless Range of the Equipment Interface Module by Connecting a THM4000R1000 Wireless Adapter to the ABCD Terminals
• Tri-Lingual - English, French and Spanish Display Options
• Precise Temperature Control (+/-1 Deg F) for Reliable and Consistent Temperature
• Multiple Staging Options to Provide Comfort or Energy Savings
• Meets Commercial Code and is Title 24 Compliant
• Energy Star® Rated

Specifications

• Type: 7 Day Programmable, 4-Heat/2-Cool Heat Pump, 3-Heat/2-Cool Conventional, Auto/Manual Changeover
• Color: White (Front/Side)
• Voltage Rating: 18 to 30 Volt AC 50/60 Hertz
• Temperature Rating: 32 to 120 Deg F
• Size: 4-1/2 Inch Width x 7/8 Inch Depth x 3-1/2 Inch Height
• Display Type 8.06 Square Inch Color Touchscreen
• Switch Position Heat-Off-Cool-Auto-EM.Heat (System), Auto-On-Circ-Follow Schedule (Fan)
• Power Method Hardwired
• Humidity Rating 5 to 90 Percent RH (Non-Condensing)
• Setting Temperature Rating 40 to 90 Deg F (Heat), 50 to 99 Deg F (Cool)
• Includes 2-Wire IAQ Thermostat, Equipment Interface Module, Wireless Outdoor Sensor and (2) Duct Sensor, RedLINK Technology
• Technology RedLINK

• YTHX9321R5012 - Honeywell 7 Day, 2 Heat/2 Cool Thermostat With Built in Wi-Fi
• YTHX9321R5079 - PRESTIGE 24V HARDWIRED KIT W/WIRELESS OAS