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Honeywell Home THX9421R5021WW Prestige IAQ 2-Wire HD Color Touchscreen Thermostat
- Regular price
- $699.00
- Sale price
- $699.00
- Regular price
-
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Product Description P/N: THX9421R5021WW
Description
The Honeywell Home (Resideo) THX9421R5021WW is a premium Prestige IAQ two-wire programmable thermostat designed for sophisticated residential and light commercial climate control. Featuring a vivid high-definition color touchscreen and RedLINK wireless technology, this wall-mounted unit actively manages up to 4 stages of heating and 2 stages of cooling while utilizing only two wires. By coordinating with a remote Equipment Interface Module (EIM), the thermostat eliminates complex in-wall wiring and delivers precise temperature, humidity, and ventilation regulation directly to the user's fingertips.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Honeywell Home / Resideo |
| Category | HVAC Parts |
| Part Number | THX9421R5021WW |
| Subcategory | Thermostats |
| Product Line | Prestige IAQ |
| System Compatibility | Up to 4 Heat / 2 Cool (Heat Pump) |
| Power Source | 24 VAC (18-30 VAC) via 2-Wire EIM connection |
| Display Type | HD Color Touchscreen |
| Wireless Protocol | RedLINK |
| Programmability | 7-Day Programmable |
| Color | White Front / White Side |
| Mounting Style | Horizontal Wall Mount |
| Weight | 0.9 lbs |
Information About THX9421R5021WWBCM-MS/TP
The THX9421R5021WW is the flagship interface of the Honeywell Home Prestige IAQ series. To achieve its streamlined two-wire design, the thermostat communicates digitally with a dedicated EIM (such as the THM5421R1021) located at the HVAC equipment panel, where all the complex mechanical relays are physically terminated. Heating and cooling technicians highly favor this unit for its patented interview-based programming, which drastically simplifies setup, and its built-in USB port, which allows installers to upload custom business logos and clone configuration settings across multiple thermostats. Furthermore, the system is fully equipped to monitor Delta T diagnostics, actively logging discharge and return air temperatures to alert users immediately if the mechanical system underperforms.
Key Features:
● Two-Wire Installation: Eliminates the need to pull new multi-conductor cable through finished walls by routing all complex equipment connections through the remote EIM.
● High-Definition Touchscreen: Features a bright, customizable color display that clearly presents indoor conditions, outdoor weather, and highly intuitive 7-day schedules.
● RedLINK Wireless Communication: Integrates seamlessly with Honeywell's secure RedLINK accessories, including remote indoor/outdoor sensors and wireless network gateways.
● Advanced IAQ Control: Manages complex indoor air quality equipment, utilizing three sets of universal contacts to regulate dedicated humidifiers, dehumidifiers, and ventilators.
● Delta T Diagnostics: Constantly evaluates the temperature split between return and discharge air, instantly flagging mechanical inefficiencies to prevent costly breakdowns.
● USB Configuration: Features a built-in USB port that allows technicians to transfer custom installer settings, service reminders, and full-color dealer logos directly to the screen.
The THX9421R5021WW delivers the visual elegance and advanced diagnostic intelligence required to optimize modern HVAC systems securely and efficiently.
Description
The Honeywell Home (Resideo) THX9421R5021WW is a premium Prestige IAQ two-wire programmable thermostat designed for sophisticated residential and light commercial climate control. Featuring a vivid high-definition color touchscreen and RedLINK wireless technology, this wall-mounted unit actively manages up to 4 stages of heating and 2 stages of cooling while utilizing only two wires. By coordinating with a remote Equipment Interface Module (EIM), the thermostat eliminates complex in-wall wiring and delivers precise temperature, humidity, and ventilation regulation directly to the user's fingertips.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Honeywell Home / Resideo |
| Category | HVAC Parts |
| Part Number | THX9421R5021WW |
| Subcategory | Thermostats |
| Product Line | Prestige IAQ |
| System Compatibility | Up to 4 Heat / 2 Cool (Heat Pump) |
| Power Source | 24 VAC (18-30 VAC) via 2-Wire EIM connection |
| Display Type | HD Color Touchscreen |
| Wireless Protocol | RedLINK |
| Programmability | 7-Day Programmable |
| Color | White Front / White Side |
| Mounting Style | Horizontal Wall Mount |
| Weight | 0.9 lbs |
Information About THX9421R5021WWBCM-MS/TP
The THX9421R5021WW is the flagship interface of the Honeywell Home Prestige IAQ series. To achieve its streamlined two-wire design, the thermostat communicates digitally with a dedicated EIM (such as the THM5421R1021) located at the HVAC equipment panel, where all the complex mechanical relays are physically terminated. Heating and cooling technicians highly favor this unit for its patented interview-based programming, which drastically simplifies setup, and its built-in USB port, which allows installers to upload custom business logos and clone configuration settings across multiple thermostats. Furthermore, the system is fully equipped to monitor Delta T diagnostics, actively logging discharge and return air temperatures to alert users immediately if the mechanical system underperforms.
Key Features:
● Two-Wire Installation: Eliminates the need to pull new multi-conductor cable through finished walls by routing all complex equipment connections through the remote EIM.
● High-Definition Touchscreen: Features a bright, customizable color display that clearly presents indoor conditions, outdoor weather, and highly intuitive 7-day schedules.
● RedLINK Wireless Communication: Integrates seamlessly with Honeywell's secure RedLINK accessories, including remote indoor/outdoor sensors and wireless network gateways.
● Advanced IAQ Control: Manages complex indoor air quality equipment, utilizing three sets of universal contacts to regulate dedicated humidifiers, dehumidifiers, and ventilators.
● Delta T Diagnostics: Constantly evaluates the temperature split between return and discharge air, instantly flagging mechanical inefficiencies to prevent costly breakdowns.
● USB Configuration: Features a built-in USB port that allows technicians to transfer custom installer settings, service reminders, and full-color dealer logos directly to the screen.
The THX9421R5021WW delivers the visual elegance and advanced diagnostic intelligence required to optimize modern HVAC systems securely and efficiently.
