
Honeywell Home YTHX9421R5127WW/U Prestige 2-Wire IAQ Kit with RedLINK Internet Gateway, White
- Item #
- HONE-YTHX9421R5127WW/U
- Mfr. part #
- YTHX9421R5127WW/U
- UPC
- 085267136945
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Shipping details
- Shipping weight: 2.4 lb
- Box size: 10.4 × 6.6 × 4.85 in
| Brand | Honeywell Home |
| Manufacturer part # | YTHX9421R5127WW/U |
| UPC | 085267136945 |
YTHX9421R5127WW has been discontinued by the manufacturer (2026-07). Suggested replacement: YTHX1200W7 - ElitePRO S1200 Smart Thermostat EIM Kit, White.
The Prestige® IAQ Thermostat kit offers temperature and humidity control for residential or light commercial use, and comes with an Equipment Interface Module, 2 duct sensors and one outdoor sensor. This WiFi thermostat features an HD color touchscreen and is ENERGY STAR® Certified. Customers can program a 7-day schedule, with vacation mode for energy savings when they're away. Controls up to 4 stages of heat and 2 stages of cool in a heat pump system and up to 3 stages of heat and 2 stages of cool in a conventional system Equipment Interface Module has 4 assignable inputs to be used with wired outdoor, indoor, discharge or occupancy sensors Meets commercial code; is title 24 compliant Adaptive Intelligent Recovery — Over time, the Prestige® thermostat learns how long it takes to reach the desired temperature and activates the system earlier Dealer information on-screen Keypad lockout to prevent unauthorized changes Displays on/off status of all equipment controlled by the thermostat RedLINK® wireless communication English, French or Spanish display options Performance logs maintain heating and cooling history.
Specifications
- Brand: Honeywell Home
- Manufacturer Part #: YTHX9421R5127WW/U
- Application: 24 Vac systems; Gas, Oil, Electric Warm Air; Hot water Coil; Gas, Oil, Electric Hydronic; or Steam / Gravity Systems
- Backlight Options: Adjustable
- Battery Size: CR2032
- Clock Type: Year Clock
- Color: Front: White, Side: White
- Communication Type: RedLINK; WiFi
- Compatible Third Party Applications: Amazon Alexa; Microsoft Cortana; IFTTT; Google Assistant
- Demand Response: No
- Display Type: Touch Screen
- Earthing: Not Applicable
- Fan Function: On; Auto; Circulating
- For Use With: RedLINK® accessories
- Heat-Cool Changeover: Auto; Manual
- Includes: THX9421R5021WW Prestige® 2-Wire IAQ Thermostat; THM5421R1021 Equipment Interface Module; THM6000R7001 RedLINK® Internet Gateway; 2 Duct Sensors
- Number of Batteries: 1
- Occupancy Sensor: Not Applicable
- Program Modes: 7-Day Programmable; Manual / Not Programmed
- Programmable: Yes
- RedLINK: Yes
- Smart Home Integration: No
- Thermostat Type: Programmable; Digital; Low Voltage; RedLINK
- Touchscreen: Yes
- Utility Rewards: No
- Warranty: 5 Years
- Wifi: No
- Wi-Fi Specifications: Internet Gateway THM6000R7001/U Provides WiFi Capabilities
- Works With Resideo Applications: Total Connect Comfort
- Z-Wave: No
- Z-Wave Specifications: Not Applicable
- UPC: 085267136945
- Category: Programmable Thermostats
Replacement
The manufacturer has discontinued this model. Recommended replacements:
- Product Information for Prestige Touch Screen Thermostat (English, French, Spanish) (0.8MB PDF)
- Installation Guide for the THM5421R Equipment Interface Module (English, French, Spanish) (6.9MB PDF)
- Redlink Zoning Options Technical Reference Manual (English) (0.9MB PDF)
- Guide Specification for YTHX9421R, THX9421R Prestige® IAQ Programmable Commercial Thermostat (English) (0.5MB PDF)
- Product Data for THX9321 Prestige® 2.0 and THX9421 Prestige® IAQ with EIM (English) (20.3MB PDF)
- Alerts and Delta T Diagnostics with the Prestige® 2.0 IAQ Thermostat (English, French, Spanish) (1.6MB PDF)
- Installation Guide for Prestige IAQ with Equipment Interface Module (English) (3.1MB PDF)
- THX9321/9421 Prestige IAQ and RF EIM System Installation Guide (English) (1.3MB PDF)
Questions about fit or compatibility? Ask our team. We usually reply within one business day.
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