--- product_id: 546646620 title: "Lite Smart Thermostat, Data Privacy, Programmable, Wi-Fi, Mobile App, Easy DIY, Compatible with Alexa, Energy Star Certified, ST25, C-Wire Not Required **New 2023!**" brand: "emerson" price: "7601920₫" currency: VND in_stock: true reviews_count: 5 category: "Emerson" url: https://www.desertcart.vn/products/546646620-lite-smart-thermostat-data-privacy-programmable-wi-fi-mobile-app store_origin: VN region: Vietnam --- # Save 23% HVAC energy Control from anywhere Privacy-first design Lite Smart Thermostat, Data Privacy, Programmable, Wi-Fi, Mobile App, Easy DIY, Compatible with Alexa, Energy Star Certified, ST25, C-Wire Not Required **New 2023!** **Brand:** emerson **Price:** 7601920₫ **Availability:** ✅ In Stock ## Summary > 🔥 Stay smart, save energy, and keep your data private! ## Quick Answers - **What is this?** Lite Smart Thermostat, Data Privacy, Programmable, Wi-Fi, Mobile App, Easy DIY, Compatible with Alexa, Energy Star Certified, ST25, C-Wire Not Required **New 2023!** by emerson - **How much does it cost?** 7601920₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/546646620-lite-smart-thermostat-data-privacy-programmable-wi-fi-mobile-app) ## Best For - emerson enthusiasts ## Why This Product - Trusted emerson brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless DIY Setup:** Built-in level & step-by-step guide for fast, no-fuss installation. - • **Privacy You Can Trust:** No data selling or ad targeting—your comfort, your data. - • **Seamless Mobile Control:** Top-rated app lets you adjust temps anytime, anywhere. - • **Energy Star Certified Savings:** Slash your HVAC bills by 23% with smart scheduling & geofencing. - • **Alexa Compatible & C-Wire Optional:** Works with Alexa and most systems without a common wire. ## Overview The Emerson Sensi Lite Smart Thermostat ST25 offers easy DIY installation with no common wire needed for most systems, Energy Star-certified efficiency saving up to 23% on HVAC energy, and robust privacy protections that ensure your data stays yours. Control your home comfort remotely via a top-rated mobile app compatible with Alexa, all packed in a sleek, compact design made in the USA. ## Description Give your family's comfort a smart upgrade. With the Sensi Lite smart thermostat, it's never been easier. It all starts with a quick and simple installation(2.4GHz WiFi connection)-no common wire required with most systems. Our top-rated mobile app lets you manage your home's HVAC from anywhere, anytime. Plus, your usage activity and personal data stays private. That's the power of putting Sensi's over 100 years of HVAC experience on your wall. Review: Works very well - Works great. Love the Wi-Fi connectivity and being able to adjust remotely. Great for referring the temperature when coming home from a trip Review: Fantastic deal for $$, EASY to DIY install w/ great video & app instructions. - I am impressed. First of all, watch the installation video in the item listing in desertcart. It is the first video for this Sensi Lite Smart Thermostat and it could not be anymore thorough than it is. If you want step by step it is that and logical. Then the app itself does the same thing, step by step as well. These folks actually cover all the bases. I know a lot about a lot of this but not AC and heating. It went off without a hitch, I have an old 4 wire system with no C wire and what is really cool is BEFORE YOU EVEN BUY you can d/l the app, go to the step as if you are installing a new one, go where you identify the wires on your old thermostat and it will tell you if it will work for you if you are not sure. I had this thing on, up, and connected to wifi and running in about 10-15 minutes, no issues. The only thing that concerned me was I was reading reviews before buying it and some people complained about it losing connectivity frequently. Only 3 minutes after installing that happened one time, and as I was reading the re-connect instructions it prompts you to, then it reconnected on its own before I could do it. For all I know that could have been my wifi burping, it does sometimes. >>IF<< I have that as a recurring issue I will be returning it because my router has plenty of reach and several devices further from it than this thermostat never lose connection. We shall see. I am just trying to give a full picture, I have no complaints but that was the primary reasonable one I saw in the negative reviews. So far I love the thing, the display is very cool, most of the time I will be bumping it manually walking by and that is a piece of cake. I have old eyes and appreciate the large numbers on the display too. I also like I can adjust it remotely from 4 states over as well. Honestly if you just want a remote app and basic functions with a schedule (I won't use) I don't know about all these others that cost way more why you would buy one of those. It is also nice looking. Oh yeah, it works on Alexa and other voice control things I also do not use. I think you get a lot of bang for the buck on this. ## Features - EASY DIY INSTALLATION: Do it yourself fast with a built-in level and simple step-by-step instructions. Works with the HVAC equipment found in most homes - COMMON WIRE REQUIREMENTS: Common wire(C-Wire) required for heat pump and heat/cool only systems. C-wire not required on most systems - SAVE ABOUT 23% ON HVAC ENERGY*: ENERGY STAR-certified and packed with features that help you save money, including flexible scheduling, geofencing, remote access and usage reports - PRIVACY PROTECTION*: Sensi won’t sell your personal information to third parties or leverage your thermostat activity data for targeting or advertising purposes - CONTROL FROM ANYWHERE: The top-rated mobile app for Android and iOS devices makes it easy to control your comfort from a smartphone or tablet ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BXZ6KXGG | | Backlight | Yes | | Brand | Emerson | | Colour | Black | | Connectivity Protocol | Wi-Fi | | Connectivity Technology | Wi-Fi | | Control Method | App | | Controller Type | Mobile App, Amazon Alexa | | Customer Reviews | 4.1 out of 5 stars 1,800 Reviews | | Display Type | graphical lcd | | Finish Types | Simple | | Item Dimensions D x W x H | 2.2D x 12.9W x 8H Centimeters | | Item Weight | 0.3 Pounds | | Manufacturer | Emerson | | Manufacturer Part Number | ST25 | | Model number | ST25 | | Mounting Type | Wall Mount | | Number of Batteries | 2 AAA batteries required. (included) | | Power Source | Corded Electric | | Product Dimensions | 2.2D x 12.9W x 8H Centimeters | | Product Features | Auto Changeover, Daylight Savings Time Ready, Filter Indicator, Low Voltage, Programmable | | Special Feature | Auto Changeover, Daylight Savings Time Ready, Filter Indicator, Low Voltage, Programmable | | Specification Met | Energy Star | | Temperature Control Type | Automatic or Programmable | | UPC | 786710568732 | | Unit Count | 1 Count | | Voltage | 24 Volts | ## Product Details - **Brand:** Emerson - **Product Dimensions:** 2.2D x 12.9W x 8H Centimeters - **Controller Type:** Mobile App, Amazon Alexa - **Special Feature:** Auto Changeover, Daylight Savings Time Ready, Filter Indicator, Low Voltage, Programmable - **Colour:** Black - **Temperature Control Type:** Automatic or Programmable - **Connectivity Technology:** Wi-Fi - **Power Source:** Corded Electric - **Item Weight:** 136 g - **Voltage:** 24 Volts ## Images ![Lite Smart Thermostat, Data Privacy, Programmable, Wi-Fi, Mobile App, Easy DIY, Compatible with Alexa, Energy Star Certified, ST25, C-Wire Not Required **New 2023!** - Image 1](https://m.media-amazon.com/images/I/61baXEIXz8L.jpg) ![Lite Smart Thermostat, Data Privacy, Programmable, Wi-Fi, Mobile App, Easy DIY, Compatible with Alexa, Energy Star Certified, ST25, C-Wire Not Required **New 2023!** - Image 2](https://m.media-amazon.com/images/I/61I37fSlM5L.jpg) ![Lite Smart Thermostat, Data Privacy, Programmable, Wi-Fi, Mobile App, Easy DIY, Compatible with Alexa, Energy Star Certified, ST25, C-Wire Not Required **New 2023!** - Image 3](https://m.media-amazon.com/images/I/61qFsIXPcuL.jpg) ![Lite Smart Thermostat, Data Privacy, Programmable, Wi-Fi, Mobile App, Easy DIY, Compatible with Alexa, Energy Star Certified, ST25, C-Wire Not Required **New 2023!** - Image 4](https://m.media-amazon.com/images/I/51GaaYzcbML.jpg) ![Lite Smart Thermostat, Data Privacy, Programmable, Wi-Fi, Mobile App, Easy DIY, Compatible with Alexa, Energy Star Certified, ST25, C-Wire Not Required **New 2023!** - Image 5](https://m.media-amazon.com/images/I/71oW2hSiPiL.jpg) ## Questions & Answers **Q: How does the auto changeover work? can i set it to keep the temp between 65 and 74 degrees and it turns a/c and heat on as necessary?** A: Yes I wasn't sure how it would work. I have my account set to 78. AC came on when it go too hot. Hope this helps. **Q: Hi. My old thermostat has the red wire connect to RH which then jumps to RC. With the Sensi lite, do I just attached the red wire to R? Thank you.** A: Sensi claims there is an internal jumper which means you only have to connect the red wire which now goes to RH. However, I had to pigtail the red wire and connect to both RH and RC **Q: Will this thermostat work on a split unit meaning natural gas heat** A: It works on my natural gas central unit (if you need emergency heat then no this touch lite will not work for you) **Q: Does this have a child lock?** A: Yes, it’s called Lock Thermostat Display. It’s located in the system settings. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works very well *by G***S on 20 February 2026* Works great. Love the Wi-Fi connectivity and being able to adjust remotely. Great for referring the temperature when coming home from a trip ### ⭐⭐⭐⭐⭐ Fantastic deal for $$, EASY to DIY install w/ great video & app instructions. *by B***. on 30 December 2025* I am impressed. First of all, watch the installation video in the item listing in Amazon. It is the first video for this Sensi Lite Smart Thermostat and it could not be anymore thorough than it is. If you want step by step it is that and logical. Then the app itself does the same thing, step by step as well. These folks actually cover all the bases. I know a lot about a lot of this but not AC and heating. It went off without a hitch, I have an old 4 wire system with no C wire and what is really cool is BEFORE YOU EVEN BUY you can d/l the app, go to the step as if you are installing a new one, go where you identify the wires on your old thermostat and it will tell you if it will work for you if you are not sure. I had this thing on, up, and connected to wifi and running in about 10-15 minutes, no issues. The only thing that concerned me was I was reading reviews before buying it and some people complained about it losing connectivity frequently. Only 3 minutes after installing that happened one time, and as I was reading the re-connect instructions it prompts you to, then it reconnected on its own before I could do it. For all I know that could have been my wifi burping, it does sometimes. >>IF<< I have that as a recurring issue I will be returning it because my router has plenty of reach and several devices further from it than this thermostat never lose connection. We shall see. I am just trying to give a full picture, I have no complaints but that was the primary reasonable one I saw in the negative reviews. So far I love the thing, the display is very cool, most of the time I will be bumping it manually walking by and that is a piece of cake. I have old eyes and appreciate the large numbers on the display too. I also like I can adjust it remotely from 4 states over as well. Honestly if you just want a remote app and basic functions with a schedule (I won't use) I don't know about all these others that cost way more why you would buy one of those. It is also nice looking. Oh yeah, it works on Alexa and other voice control things I also do not use. I think you get a lot of bang for the buck on this. ### ⭐⭐⭐⭐⭐ Replaces my brivis network thermostat with this unit *by A***R on 13 May 2024* I managed to get this working with my old brivis gas heating unit. This thermostat need C wire for gas heating. Old thermostat had only two wires. But the heater unit had C wire built-in which I rewired to connect to this thermostat to make it work. Setup is very straightforward. It's being one month since I installed and working perfectly. Happy with thr product so far. Note that this is a US product and it has US units and location/ weather information is only related to US or Canada. But I use Alexa and Google Home to align with my location in AU. ## Frequently Bought Together - Sensi Lite Smart Thermostat, Data Privacy, Programmable, Wi-Fi, Easy DIY, Works With Alexa, Energy Star Certified, ST25, Most Systems C-Wire Not Required, Except On Heat/Cool Only and Heat Pump System - CAMGJORT SA5B Wall Plate for Sen si Touch Wi-Fi Thermostat ST75,Black(1 PACK) --- ## 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.vn/products/546646620-lite-smart-thermostat-data-privacy-programmable-wi-fi-mobile-app](https://www.desertcart.vn/products/546646620-lite-smart-thermostat-data-privacy-programmable-wi-fi-mobile-app) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-06-02*