Honeywell Home THX9421R5021WW/U Basic Prestige 2-Wire Thermostat with RedLINK Technology

Deliver consistent comfort and streamlined equipment control across residential or light-commercial sites with the Honeywell Home Prestige 2-Wire Thermostat. This thermostat kit combines IAQ (indoor air quality) monitoring and energy-saving control into one installer-friendly package — ideal for retrofit projects where minimizing rewiring is critical. The HD color touchscreen and patented interview-based programming speed setup, while the included Equipment Interface Module allows heating, cooling and IAQ sensors to be wired at the module instead of the wall unit. ENERGY STAR certification plus Adaptive Intelligent Recovery and Smart Schedule reduce runtime and operating costs across a 7-day programmable calendar. RedLINK wireless communication provides secure remote status, environmental monitoring and compatibility with building security or automation platforms. Supports conventional and heat pump systems and integrates with voice assistants (Alexa, Google) and IFTTT for modern building management. Designed for professional installation, the Prestige series maintains performance logs and meets Title 24 requirements for commercial code. Upgrade to a thermostat that improves occupant comfort, simplifies service, and enhances energy and IAQ monitoring—perfect for property managers and contractors looking to modernize controls.

• Simplifies retrofits: 2-wire thermostat operation with an Equipment Interface Module lets you control heating, cooling and IAQ equipment without rewiring the thermostat location.
• Reliable wireless monitoring: RedLINK wireless communication delivers remote equipment status and IAQ sensor data for proactive building monitoring and integration with security or automation systems.
• Energy-first performance: ENERGY STAR certified with Adaptive Intelligent Recovery and Smart Schedule to reduce run time and lower utility costs across 7-day programmable schedules.
• Intuitive user experience: HD color touchscreen and patented interview-based programming get systems online quickly and reduce service calls for installers.
• Flexible integration: Works with THM5421R1021 interface module and supports Amazon Alexa, Google Assistant and IFTTT for smart-building control and remote access.
• Professional-ready features: Title 24 compliance, installer setup options, keypad lockout and performance logs help maintain system integrity and meet commercial requirements.