Lennox 27U63 Honeywell THX321WF2003W T10+ Pro Smart Thermostat is a professional-grade programmable Wi-Fi thermostat designed for advanced heat pump and conventional HVAC systems. Built with RedLINK 3.0 technology, this ENERGY STAR certified thermostat delivers precise temperature control, energy savings, and flexible scheduling for residential and light commercial applications.
The THX321WF2003W supports up to 3 Heat / 2 Cool heat pump systems and up to 2 Heat / 2 Cool conventional systems, making it an ideal OEM replacement or upgrade for multi-stage HVAC equipment. Integrated Wi-Fi allows remote access, monitoring, and control through compatible mobile devices, while advanced programmability options provide full customization of your comfort schedule.
The T10+ Pro also supports optional RedLINK Smart Room Sensors (sold separately) for priority room scheduling and enhanced comfort management across multiple zones. Features like geofencing and 7-day programmable scheduling help optimize system performance and reduce energy consumption without sacrificing comfort.
Key Specifications:
Brand: Honeywell
Lennox Catalog Number: 27U63
Model Number: THX321WF2003W
Family: T10+ Pro
Type: Programmable, Low Voltage, Digital, Wi-Fi
Programmability: 7-Day, 5-1-1, 5-2, 1 Week, Manual, Geofencing, Sensor Priority Scheduling
Wi-Fi Enabled: Yes
Stages:
• Up to 3 Heat / 2 Cool Heat Pump Systems
• Up to 2 Heat / 2 Cool Conventional Systems
Warranty: 5 Years
Gross Weight: 2.05 lbs
The Lennox 27U63 Honeywell T10+ Wi-Fi thermostat is a smart HVAC control solution for contractors and homeowners seeking advanced system compatibility, room-by-room comfort control, and energy-efficient performance. Ideal for upgrading existing multi-stage heat pump systems with reliable OEM quality and modern smart technology.