---
product_id: 142651909
title: "Honeywell THX9421R5021WW Redlink Prestige IAQ Color Touchscreen Thermostat"
brand: "honeywell"
price: "$846.40"
currency: USD
in_stock: true
reviews_count: 1
category: "Honeywell"
url: https://www.desertcart.us/products/142651909-honeywell-thx9421r5021ww-redlink-prestige-iaq-color-touchscreen-thermostat
store_origin: US
region: United States of America
---

# Full-color touchscreen display 7-day programmable scheduling RedLINK wireless connectivity Honeywell THX9421R5021WW Redlink Prestige IAQ Color Touchscreen Thermostat

**Brand:** honeywell
**Price:** $846.40
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate your comfort with smart, stylish control — because your space deserves the best!

## Quick Answers

- **What is this?** Honeywell THX9421R5021WW Redlink Prestige IAQ Color Touchscreen Thermostat by honeywell
- **How much does it cost?** $846.40 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/142651909-honeywell-thx9421r5021ww-redlink-prestige-iaq-color-touchscreen-thermostat)

## Best For

- honeywell enthusiasts

## Why This Product

- Trusted honeywell brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Anywhere Access:** RedLINK technology lets you manage your thermostat remotely with ease
- • **Energy-Savvy Design:** Qualifies for energy credits while optimizing your home’s HVAC performance
- • **Smart Heat Pump Support:** Handles up to 4 heating and 2 cooling stages for ultimate efficiency
- • **Tailored Weekly Comfort:** 7-day programmable settings adapt perfectly to your lifestyle
- • **Seamless Climate Command:** Intuitive full-color touchscreen puts control at your fingertips

## Overview

The Honeywell THX9421R5021WW Redlink Prestige IAQ is a modern, full-color touchscreen thermostat designed for both residential and commercial use. Featuring 7-day programmable scheduling and compatibility with advanced heat pump systems (up to 4H/2C), it leverages RedLINK wireless technology for remote control and seamless integration. Its sleek white design and energy-saving capabilities make it a top-tier choice for smart, efficient climate management.

## Description

Redesigned Prestige IAQ full-color, touchscreen thermostat with RedLINK technology. Residential or commercial use. 7-day programmable. Up to 4H/2C heat pump or up to 3H/2C conventional. Works with the THM5421R1021 Equipment Interface Module (EIM), sold separately.

Review: Excellent Quality - An excellent quality product from Honeywell - as I would expect. This replaced an already installed programmable Honeywell thermostat. The installation was a breeze and the quality of the instructions great. The device qualifies me for some energy credits with my utility. The networking feature means I can control the temperature from anywhere I can connect to the internet.

## Features

- White front/white sides
- 7-day programmable
- Up to 4H/2C heat pump or up to 3H/2C conventional

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07NZ1KVBZ |
| Additional Features | Auto Changeover, Programmable |
| Backlight | Yes |
| Best Sellers Rank | #356,658 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #408 in Home Programmable Thermostats |
| Brand | Honeywell |
| Brand Name | Honeywell |
| Color | White |
| Connectivity Protocol | RedLINK |
| Connectivity Technology | RedLink |
| Control Method | Touch |
| Control Type | Touch |
| Controller Type | Touchscreen |
| Customer Reviews | 5.0 out of 5 stars 2 Reviews |
| Display Type | color touchscreen |
| Included Components | Thermostat, Basic Prestige Kit |
| Item Weight | 1.2 Pounds |
| Manufacturer | Honeywell |
| Manufacturer Part Number | THX9421R5021WW/U |
| Model Name | Prestige |
| Model Number | THX9421R5021WW |
| Mounting Type | Wall Mount |
| Power Source | Hardwired, Battery |
| Product Style | Modern |
| Shape | Rectangular |
| Smart Home Compatibility | Smart Home Compatible |
| Special Feature | Auto Changeover , Programmable |
| Specific Uses For Product | Heat Pump |
| Specification Met | eim |
| Temperature Control Type | Programmable Heating/Cooling |
| UPC | 852676536273 |
| Voltage | 24 Volts |

## Product Details

- **Brand:** Honeywell
- **Color:** White
- **Controller Type:** Touchscreen
- **Model Name:** Prestige
- **Special Feature:** Auto Changeover, Programmable

## Images

![Honeywell THX9421R5021WW Redlink Prestige IAQ Color Touchscreen Thermostat - Image 1](https://m.media-amazon.com/images/I/517rHOXg1PL.jpg)
![Honeywell THX9421R5021WW Redlink Prestige IAQ Color Touchscreen Thermostat - Image 2](https://m.media-amazon.com/images/I/41GzQdY4fOL.jpg)
![Honeywell THX9421R5021WW Redlink Prestige IAQ Color Touchscreen Thermostat - Image 3](https://m.media-amazon.com/images/I/41JAAnO5XZL.jpg)
![Honeywell THX9421R5021WW Redlink Prestige IAQ Color Touchscreen Thermostat - Image 4](https://m.media-amazon.com/images/I/51YCT6g0FWL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent Quality
*by T***E on April 13, 2025*

An excellent quality product from Honeywell - as I would expect. This replaced an already installed programmable Honeywell thermostat. The installation was a breeze and the quality of the instructions great. The device qualifies me for some energy credits with my utility. The networking feature means I can control the temperature from anywhere I can connect to the internet.

## Frequently Bought Together

- Honeywell THX9421R5021WW Redlink Prestige IAQ Color Touchscreen Thermostat
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- LiCB CR2032 3V Lithium Battery(10-Pack)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-13*