--- product_id: 172529642 title: "THR840DEU DT2 Thermostat, White" brand: "honeywell home" price: "R$1233" currency: BRL in_stock: true reviews_count: 13 category: "Honeywell Home" url: https://www.desertcart.com.br/products/172529642-thr840deu-dt2-thermostat-white store_origin: BR region: Brazil --- # Battery powered, easy swap 5°C-35°C precise temp range Extra-large, high-contrast LCD THR840DEU DT2 Thermostat, White **Brand:** honeywell home **Price:** R$1233 **Availability:** ✅ In Stock ## Summary > 🌿 Upgrade your comfort, save energy, and stay ahead with Honeywell’s sleek smart thermostat! ## Quick Answers - **What is this?** THR840DEU DT2 Thermostat, White by honeywell home - **How much does it cost?** R$1233 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/172529642-thr840deu-dt2-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 - • **Sleek Minimalist Design:** Modern slim profile and large backlit display blend seamlessly into any professional or home environment. - • **Universal Compatibility:** Works flawlessly with boilers, heat pumps, hybrid systems, and underfloor heating—future-proof your space. - • **Plug & Play Installation:** Battery-powered with included batteries and simple front cover access for hassle-free setup and maintenance. - • **Smart Self-Learning Tech:** TPI fuzzy-logic adapts to your heating/cooling needs—no programming, just comfort and efficiency. - • **Effortless Climate Control:** Set your perfect temp from 5°C to 35°C with intuitive one-touch Eco mode for smart energy savings. ## Overview The Honeywell Home THR840DEU DT2 Thermostat is a wired, battery-powered digital thermostat featuring a wide 5°C to 35°C temperature range, intelligent self-learning TPI control, and an easy-to-use one-touch Eco mode. Its large, high-contrast LCD display and minimalist design make it a stylish, user-friendly upgrade compatible with a broad range of heating and cooling systems, including boilers, heat pumps, and hybrid setups—no WiFi or app needed. ## Description From the manufacturer The Honeywell Home DT3 Room Thermostat allows you to take charge of your comfort with simple design, user-friendly features, and energy efficient savings. Versatile and compatible with a variety of systems. Upgrade your basic or older thermostat with this intelligent range. Integration with smart devices such as Honeywell Home evohome, but requires no app, WiFi or hub to operate. GO GREEN: Compatible with hybrid and green heating systems. Use as a standalone install or part of an existing system, including conventional and combi boilers, and new heating and cooling applications. DESIGNED FOR COMPATIBILITY: The DT3 range is compatible with both heating and cooling, including heat pumps, zoning, underfloor and OpenTherm. ROOM THERMOSTAT: Frost-protection, self-learning TPI fuzzy-logic control, easy-to-read LED-based screen with on/off eco display. Eco-mode or boost-mode for optimal comfort. SLEEK DESIGN: Function meets style. The DT3’s modern design effortlessly blends into your home decor. It's a discreet addition that enhances your space while upgrading your comfort. DURABLE: Built to last with robust materials to withstand daily use for years to come. HONEYWELL HOME DT3 MODEL OPTIONS: Choose wired or wireless thermostat to suit your installation needs. Comes in black or white. Universal Compatibility Is the DT3 suitable for my property and will it fit my heating setup? The DT3 range features wired or wireless options and are suitable for most homes or businesses looking for simple, modern HVAC control. DT3 Room Thermostats are designed to work with a variety of systems, Compatible with 24-230 V On/Off appliances such as gas boilers, combi-boilers, and heat pumps. They perfectly suit a variety of homes, and a multitude of system applications. Simply choose the right fit for your installation. Do I need WiFi to operate my thermostat? Honeywell Home DT3 Thermostats require no hub, no apps, or WiFi to install or operate. They are ideal for upgrading older or inefficient systems in your living space. Supporting Greener Energy Systems DT3 Room Thermostats can be installed standalone or as part of a wider home comfort solution, with products such as the evohome multi-zone controllers. They are compatible with both hybrid and greener energy systems and energy-efficient solutions, including heat pumps, zoning and underfloor heating/cooling devices. Features Based on Feedback Made to the exact needs of contractors and customers, the Honeywell Home DT3 range incorporates customer feedback. Bringing precision and intelligence into your home, this thermostat is tailor-made for users. Smart Integration Made for ultimate flexibility, the DT3 range is ideal for linking older and newer systems for flawless efficiency. A smart choice for your future and for your wallet. DT3 Room Thermostats can be installed standalone or as part of a wider home comfort solution, with products such as the evohome multi-zone controllers. Eco-Mode & Boost Mode Also features a built in eco-mode to reduce room temperature for set times to help save money and the environment. Stylish Design Honeywell Home offers a modern design with plenty of features for both convenience and energy saving. The DT3 range is designed for user-friendly functionality with modern efficiency. We understand the importance of aesthetics in your home and the need for durable, long-lasting components. Honeywell Home DT3 Room Thermostats bring together slim, modern design with simple functionality. Easy to use, with features that are easy to love, they offer everything you want and need, including slim design and easy installation. Key Functions & Features Icons give a clear indication of device status. Slim design to blend with decor Display dimming when not in use Easy-to-read, backlit display with intuitive buttons Built-in frost protection Self-learning TPI fuzzy-logic control Eco modes to save on energy costs Honeywell Home is a Trusted Brand Resideo brings over 130 years of heritage in engineering together with the latest smart technology. We’re a global provider of home comfort and security solutions, committed to keeping your customers’ homes safe, comfortable and efficient, in the simplest way possible. Honeywell Home brand is more than a name on innovations; it’s part of a promise to keep the heritage of home at the heart of everything. Review: Great - Easy to install, item as described. Easy to use, excellent value for money. Good quality for the price. Basic but does the job great and looks better than my previous thermostat. Would recommend Review: Good Honeywell thermostat - Accurate and consistent performance. This thermostat comes with a good range of adjustable parameters for those who want to personalise their heating controls. Easy to install and attractive piece of kit. ## Features - Digital wired on/off thermostat - 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 - 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 | |---------------|-------| | ASIN | B07YPQRC4L | | Backlight | Yes | | Best Sellers Rank | 79,817 in DIY & Tools ( See Top 100 in DIY & Tools ) 7,840 in Heating & Cooling | | Brand | Honeywell Home | | Brand Name | Honeywell Home | | Colour | Wired White | | Connectivity Protocol | BACnet MS/TP | | Connectivity Technology | Wi-Fi | | Control Method | Touch | | Control Type | Button Control | | Controller Type | Push Button | | Controller type | Push Button | | Customer Reviews | 4.2 out of 5 stars 1,161 Reviews | | Display Type | LCD | | Included Components | Inhalt: 1 Stück | | Item Dimensions D x W x H | 2.9D x 9W x 9.2H centimetres | | Item Shape | Rectangular | | Item Weight | 299 Grams | | Manufacturer | Honeywell Home | | Manufacturer Part Number | THR840DEU | | Material Type | Plastic, Electronic Components | | Model Name | THR840DEU | | Model Number | THR840DEU | | Model name | THR840DEU | | Mounting Type | Wall Mount | | Power Source | Battery Powered | | Product Style | Wired | Basic | | Product dimensions | 2.9D x 9W x 9.2H centimetres | | Special Features | Heiz- oder Kühlsteuerleistung mit Sollwertbereich | | Special feature | Heiz- oder Kühlsteuerleistung mit Sollwertbereich | | Specific Uses For Product | Boiler | | Specification Met | energy | | Temperature Control Type | Learning | | Unit Count | 1.0 count | | Voltage | 230 Volts | ## Product Details - **Brand:** Honeywell Home - **Colour:** Wired White - **Connectivity technology:** Wi-Fi - **Controller type:** Push Button - **Included components:** Inhalt: 1 Stück - **Model name:** THR840DEU - **Product dimensions:** 2.9D x 9W x 9.2H centimetres - **Special feature:** Heiz- oder Kühlsteuerleistung mit Sollwertbereich - **Specific uses for product:** Boiler - **Temperature Control Type:** Learning ## Images ![THR840DEU DT2 Thermostat, White - Image 1](https://m.media-amazon.com/images/I/51xY-MDtdXL.jpg) ![THR840DEU DT2 Thermostat, White - Image 2](https://m.media-amazon.com/images/I/61jCisjfcGL.jpg) ![THR840DEU DT2 Thermostat, White - Image 3](https://m.media-amazon.com/images/I/61jrXARr0jL.jpg) ![THR840DEU DT2 Thermostat, White - Image 4](https://m.media-amazon.com/images/I/51LToVatsXL.jpg) ## Available Options This product comes in different **Color, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great *by L***W on 11 February 2026* Easy to install, item as described. Easy to use, excellent value for money. Good quality for the price. Basic but does the job great and looks better than my previous thermostat. Would recommend ### ⭐⭐⭐⭐⭐ Good Honeywell thermostat *by C***0 on 14 November 2025* Accurate and consistent performance. This thermostat comes with a good range of adjustable parameters for those who want to personalise their heating controls. Easy to install and attractive piece of kit. ### ⭐⭐⭐⭐ A replacement fitted in less than five minutes. *by D***B on 24 December 2025* A direct swap for a failed unit, much cheaper than Screwfix plus next day delivery. Fitted in less than five minutes and working as it should. There is an updated version so probably in short supply ## Frequently Bought Together - Honeywell Home THR840DEU DT2 Thermostat, White - HONEYWELL ST9400C Thermostat Programmer. 7, 2-Channel, 3 on/Off per Day, 24 V, White, 1 --- ## 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.com.br/products/172529642-thr840deu-dt2-thermostat-white](https://www.desertcart.com.br/products/172529642-thr840deu-dt2-thermostat-white) --- *Product available on Desertcart Brazil* *Store origin: BR* *Last updated: 2026-07-17*