The Lennox 27U61 – Resideo YTHM1004R3000 T10+ Pro Smart Thermostat is a professional-grade, Wi-Fi enabled programmable thermostat designed for advanced residential HVAC systems. Built for precision comfort and energy efficiency, this digital low-voltage thermostat supports up to 3 Heat / 2 Cool heat pump systems and up to 2 Heat / 2 Cool conventional systems.

Part of the T10+ family, this smart thermostat uses Room, Return, and Supply Sensors to prioritize occupied areas and maintain consistent temperatures throughout the home. With built-in Wi-Fi connectivity and geofencing capability, users can remotely monitor and adjust settings from virtually anywhere, helping reduce energy waste while improving comfort.

Paired with an Equipment Interface Module (EIM), the YTHM1004R3000 provides broad HVAC compatibility and simplified installation. Flexible programming options include 7-day scheduling, 5-2, 5-1-1, 1-week programmable, or manual operation, making it adaptable for both homeowners and HVAC professionals.

Key Features:

• Brand: Resideo
• Catalog Number: 27U61
• Model: YTHM1004R3000
• Family: T10+ Pro
• Type: Programmable, Digital, Low Voltage, Wi-Fi Thermostat
• Wi-Fi Enabled: Yes
• Staging: Up to 3 Heat / 2 Cool Heat Pump Systems; Up to 2 Heat / 2 Cool Conventional Systems
• Programmability: 7-Day, 5-2, 5-1-1, 1-Week, Manual, Geofencing, Sensor Priority Scheduling
• Warranty: 5 Years
• Gross Weight: 2.05 lbs

The Resideo T10+ Pro Smart Thermostat is an ideal OEM replacement or upgrade solution for homeowners seeking advanced zoning control, smart connectivity, and reliable HVAC performance. Designed for accuracy, efficiency, and long-term durability, it delivers professional-level climate control for modern heat pump and conventional systems.