Honeywell THX1100W3 ElitePRO S1100 Smart Thermostat, 5” Touchscreen In White

Upgrade comfort, efficiency, and control with the ElitePRO S1100 Smart Thermostat — a modern, customizable thermostat engineered for homeowners and HVAC professionals. Featuring a large 5" touchscreen, advanced IAQ capabilities, and seamless RedLINK™, Wi-Fi, Bluetooth®, and Matter connectivity, the S1100 delivers an elevated smart-home experience while simplifying installations and service. Designed for both residential and light commercial applications, the ElitePRO S1100 replaces popular TH8321WF models while adding powerful new features like occupancy sensing, customizable display themes, and compatibility with remote room sensors and EIM modules. With ENERGY STAR® certification and support for Pro-IQ™ services, it delivers long-term value through energy savings, remote setup, and system insights. Features: Premium Design & Display Large 5" touchscreen for clear visibility and intuitive control. Modern aesthetic with sleek profile; available in white or black. Customizable display themes – adjust idle screen layouts, colors, clocks, and weather. Advanced Comfort & IAQ Control Supports up to 4H 2C heat pump or 3H 3C conventional systems. IAQ management including humidity, ventilation, VOC, and estimated CO₂ control. Configurable outputs (x2) for IAQ devices or additional heating/cooling stages. Occupancy detection adjusts temperature to save energy automatically. Works with optional remote room sensors to eliminate hot/cold spots. Smart Connectivity & Integration Integrated RedLINK™, Wi-Fi, Bluetooth®, and Matter for flexible smart-home compatibility. Compatible with Equipment Interface Module (EIM) for simplified wiring on complex jobs. Supports dual fuel, fan-coil, PTAC, and radiant systems. Seamless integration with connected accessories for system expansion.* Pro-IQ™ Services (For HVAC Pros) Faster installations with on-app ISU configuration and saved templates. Customer loyalty tools including branded on-device and in-app contact info. Real-time system insights to identify maintenance needs and upsell IAQ upgrades. Managed easily through the Resideo Pro app. Energy Efficiency & Reliability ENERGY STAR® Certified for energy savings and rebate eligibility. UWP® wall mounting plate for quick installs and upgrades. Designed for residential and light commercial use.