---
product_id: 159837858
title: "THR842DEU DT2R Thermostat, White"
brand: "honeywell home"
price: "2285 kr"
currency: DKK
in_stock: true
url: https://www.desertcart.dk/products/159837858-thr842deu-dt2r-thermostat-white
store_origin: DK
region: Denmark
---

# Reliable 2-way wireless comms Battery powered with included batteries 5°C-35°C precise temp range THR842DEU DT2R Thermostat, White

**Brand:** honeywell home
**Price:** 2285 kr
**Availability:** ✅ In Stock

## Summary

> 🌡️ Stay cool, save energy, and control your comfort effortlessly!

## Quick Answers

- **What is this?** THR842DEU DT2R Thermostat, White by honeywell home
- **How much does it cost?** 2285 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/159837858-thr842deu-dt2r-thermostat-white)

## Best For

- honeywell home enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Control:** Intelligent self-learning TPI tech adapts heating/cooling for ultimate comfort without programming.
- • **Sleek & Minimalist:** Modern slim styling in clean white fits any home décor, blending tech with elegance.
- • **Smart Energy Saver:** One-touch ECO mode lets you cut energy use on your schedule, from 1 to 24 hours.
- • **User-Friendly Design:** Extra-large, high-contrast LCD display with simple interface—no learning curve, just instant control.
- • **Seamless Wireless Setup:** Two-way wireless communication with signal strength test ensures flawless installation and operation.

## Overview

The Honeywell Home THR842DEU DT2R Thermostat offers precise temperature control from 5°C to 35°C with intelligent self-learning technology and a convenient one-touch ECO mode for energy savings. Featuring reliable two-way wireless communication and an extra-large, easy-to-read LCD display, this battery-powered thermostat combines sleek minimalist design with effortless installation and use, making it the perfect smart upgrade for any modern home.

## Description

THR842DEU DT2R Thermostat, White

## Features

- For wireless thermostat installations
- Heating or cooling control capacity with 5°C to 35°C set point range, intelligent self-learning (TPI), and one-touch ECO button allows user to change to a lower, energy-saving set point for a timed period. When the ECO button is pressed, the user is given the chance to set the time required at this new temperature, from 1 hour to 24 hours in 1-hour increments
- Installer mode allows the thermostat to be customised for the application and the needs of the user, and reliable, two-way wireless communication with signal strength test
- Extra-large display and simple user interface, easy mounting and use (battery powered with batteries included) and simple battery change by unclipping front cover
- Efficient control, easy to use, no learning curve/programming, large high contrast display with easy-to-read characters, and modern minimalistic design with slim styling, suitable for any home décor

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Honeywell Home |
| Part number | THR842DEU |
| Item Weight | 480 g |
| Product Dimensions | 9 x 2.9 x 9.2 cm; 480 g |
| Item model number | THR842DEU |
| Colour | Wireless White |
| Style | Wireless | Basic |
| Finish | shiny |
| Material | Plastic |
| Shape | Rectangular |
| Power source type | Battery Powered |
| Voltage | 230 Volts |
| Item Package Quantity | 1 |
| Display style | LCD |
| Plug profile | Wall Mount |
| Special Features | Einfache Montage und Bedienung (batteriebetrieben. |
| Specific uses | heaters |
| Included components | Inhalt: 1 Stück |
| Batteries included? | Yes |
| Batteries Required? | Yes |

## Product Details

- **Brand:** Honeywell Home
- **Model name:** THR842DEU
- **Product dimensions:** 2.9D x 9W x 9.2H centimetres
- **Controller type:** Push Button
- **Special feature:** Einfache Montage und Bedienung (batteriebetrieben.
- **Colour:** Wireless White
- **Specific uses for product:** heaters
- **Temperature Control Type:** learning
- **Connectivity technology:** Wi-Fi
- **Included components:** Inhalt: 1 Stück

## Images

![THR842DEU DT2R Thermostat, White - Image 1](https://m.media-amazon.com/images/I/51j18+rLjtL.jpg)
![THR842DEU DT2R Thermostat, White - Image 2](https://m.media-amazon.com/images/I/61jCisjfcGL.jpg)
![THR842DEU DT2R Thermostat, White - Image 3](https://m.media-amazon.com/images/I/61WM56EcZJL.jpg)
![THR842DEU DT2R Thermostat, White - Image 4](https://m.media-amazon.com/images/I/61jrXARr0jL.jpg)
![THR842DEU DT2R Thermostat, White - Image 5](https://m.media-amazon.com/images/I/51LToVatsXL.jpg)

## Available Options

This product comes in different **Colour Name, Style Name** options.

## Questions & Answers

**Q: Can this replace an old siemens raa20 analouge**
A: I'm afraid that's an almost impossible question to answer properly since the features the Siemens unit and the Honeywell thermostat are very different, and don't overlap in many details.
It is 'similar' in that it will 'request' heat when the temperature falls below the (adjustable) setting. [This feature simply relies on a small relay closure within the Honeywell thermostat, but the wiring for this appears to be slightly different from that of the Siemens.] It does not offer any facility to request cooling.
Also, be aware that this Honeywell thermostat uses 2 x AA batteries to maintain its time/temperature settings: this may not be 'appropriate' in certain circumstances where a public building is involved. This Honeywell thermostat is really only intended for domestic purposes.
I would honestly recommend you approach a qualified heating engineer if you really need to replace the Siemens unit for any reason.

**Q: why does it need batteries if it is wired?**
A: The thermostat works like a light switch where it makes and breaks a live wire.So unless you had a 3 core cable going from the boiler to the thermostat you would need batteries to power it.
The Thermostat requires a neutral wire and a live wire to power the display like a plug does.

**Q: Hi my honeywell cm921 needs replacing. is this compatible?**
A: Hi there, in short no. The CM921 is programmable, which means you can us it to set times for your heating to go on and off. The 842 is just a thermostat. This will only control the temperature of your heating.

hope this helps.

**Q: can i use this with a three wire system**
A: Yes there are 3 terminals to wire into

## Frequently Bought Together

- Honeywell Home THR842DEU DT2R Thermostat, White
- HONEYWELL ST9400C Thermostat Programmer. 7, 2-Channel, 3 on/Off per Day, 24 V, White, 1
- “New Model” GRUNDFOS UPS3 15-50/65 Pump - Replaces UPS2 15-50/60

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.dk/products/159837858-thr842deu-dt2r-thermostat-white](https://www.desertcart.dk/products/159837858-thr842deu-dt2r-thermostat-white)

---

*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-02-02*