S1100 Smart Thermostat — 5" Touchscreen, WiFi, IAQ Control, 4H/2C Heat Pump / 3H/3C Conventional, Black — THX1100B4/U

The ElitePRO S1100 is a premium smart thermostat built for HVAC professionals who demand more from their installs. Centered around a crisp 5" color touchscreen with a customizable idle screen, the S1100 delivers a sleek, modern look in matte black that works in any residential or commercial setting. Beyond temperature control, it actively monitors indoor air quality — tracking humidity, VOC levels, and estimated CO2 — and can control up to 2 IAQ devices directly through configurable outputs, making it one of the most capable thermostats available at this price point. System compatibility is virtually unmatched: supports up to 4 heat/2 cool heat pump or 3 heat/3 cool conventional configurations, plus dual fuel, fan-coil, PTAC, and radiant systems, with expandable coverage available through an optional equipment interface module. The wireless ecosystem connects seamlessly with optional remote room sensors for temperature, humidity, and motion monitoring, allowing installers to prioritize comfort in any room without running additional wiring. Built-in occupancy detection with auto-away functionality helps occupants reduce energy consumption without any manual input. Whether you're upgrading a single-family home or outfitting a multi-unit commercial property, the S1100 is the one thermostat that handles it all.

• 5" customizable touchscreen — Large, premium color display with adjustable idle screen options; sleek matte black finish blends with modern interiors
• Advanced IAQ monitoring & control — Monitors indoor humidity, VOC, and estimated CO2 levels; controls up to 2 IAQ devices with configurable outputs (additional equipment may be required)
• Broad system compatibility — Supports up to 4H/2C heat pump or 3H/3C conventional systems; compatible with dual fuel, fan-coil, PTAC, and radiant systems
• Wireless ecosystem — Connects via wireless technology with compatible room sensors (temperature, humidity & motion), equipment interface modules, and outdoor sensors for whole-home awareness
• Smart energy savings — Advanced occupancy detection with auto-away feature helps reduce energy use when no one is home
• Room-priority comfort — Pair with optional remote room sensors to prioritize comfort in any specific room (sensors sold separately)