---
product_id: 15267684
title: "Honeywell Home THM5421R1021 IAQ Equipment Interface Module, Multicolor"
brand: "honeywell"
price: "₨78286"
currency: LKR
in_stock: true
url: https://www.desertcart.lk/products/15267684-honeywell-home-thm5421r1021-iaq-equipment-interface-module-multicolor
store_origin: LK
region: Sri Lanka
---

# Multicolor design Compact dimensions Wired connectivity Honeywell Home THM5421R1021 IAQ Equipment Interface Module, Multicolor

**Brand:** honeywell
**Price:** ₨78286
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate Your Air Quality Game!

## Quick Answers

- **What is this?** Honeywell Home THM5421R1021 IAQ Equipment Interface Module, Multicolor by honeywell
- **How much does it cost?** ₨78286 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/15267684-honeywell-home-thm5421r1021-iaq-equipment-interface-module-multicolor)

## 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

- • **Energy Efficient:** Hardwired power source ensures reliable performance without the need for batteries.
- • **User-Friendly Design:** Push button control for effortless operation, making it perfect for any tech-savvy homeowner.
- • **Compatibility Champion:** Works flawlessly with all Prestige IAQ and new RedLINK VisionPRO Thermostats.
- • **Smart Sensor Integration:** Seamlessly connect up to four wired sensors for optimal indoor air quality.
- • **Versatile Control Options:** Three sets of IAQ contacts for precise control over humidification, dehumidification, and ventilation.

## Overview

The HoneywellHome THM5421R1021 IAQ Equipment Interface Module is a cutting-edge solution designed to enhance indoor air quality management. With four sensor inputs and three IAQ contacts, it provides comprehensive control over humidification, dehumidification, and ventilation. Compatible with all Prestige IAQ Thermostats and the new RedLINK VisionPRO Thermostats, this module is perfect for modern homes seeking efficiency and comfort.

## Description

Honeywell Home THM5421R1021 IAQ Equipment Interface Module, Multicolor

## Features

- Four sensor inputs for wired sensors or dry contact devices
- Three sets of IAQ contacts to control humidification, dehumidification, and ventilation
- Used with all versions of Prestige IAQ Thermostats and the New RedLINK VisionPRO Thermostats
- Four sensor inputs for wired sensors or dry contact devices
- Three sets of IAQ contacts to control humidification, dehumidification and ventilation
- Used with all versions of Prestige IAQ Thermostats and the New Relink VisionPRO Thermostats
- Four sensor inputs for wired sensors or dry contact devices
- Three sets of IAQ contacts to control humidification, dehumidification and ventilation
- Used with all versions of Prestige IAQ Thermostats and the New Relink VisionPRO Thermostats

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Honeywell |
| Model Name | THM5421R1021 |
| Controller Type | Push Button |
| Special Feature | Programmable |
| Color | Multicolor |
| Specific Uses For Product | Heat Pump |
| Temperature Control Type | digital |
| Connectivity Technology | Wired |
| Included Components | Interface Module |
| Power Source | Hardwired |
| Voltage | 230 Volts |
| Material | Plastic |
| Display Type | No Display |
| Control Type | Button Control |
| Control Method | Touch |
| Connectivity Protocol | Wi-Fi |
| Mounting Type | Wall Mount |
| Style | Functional |
| Backlight | No |
| UPC | 799198616062 085267328180 |
| Global Trade Identification Number | 00085267328180 |
| Manufacturer | Honeywell |
| Part Number | THM5421R1021/U |
| Item Weight | 0.317 ounces |
| Product Dimensions | 10 x 5.9 x 2.3 inches |
| Item model number | THM5421R1021 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Special Features | Programmable |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** Honeywell
- **Model Name:** THM5421R1021
- **Controller Type:** Push Button
- **Special Feature:** Programmable
- **Color:** Multicolor

## Images

![Honeywell Home THM5421R1021 IAQ Equipment Interface Module, Multicolor - Image 1](https://m.media-amazon.com/images/I/81l3C9Es33L.jpg)

## Frequently Bought Together

- Honeywell Home THM5421R1021 IAQ Equipment Interface Module, Multicolor
- Honeywell TH8320R1003 VisionPro 8000 with RedLINK Digital Thermostat, White
- Honeywell Home RedLINK to Internet Gateway and Ethernet Cable and Power Cord (THM6000R7001), White

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**Shop now:** [https://www.desertcart.lk/products/15267684-honeywell-home-thm5421r1021-iaq-equipment-interface-module-multicolor](https://www.desertcart.lk/products/15267684-honeywell-home-thm5421r1021-iaq-equipment-interface-module-multicolor)

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-05*