--- product_id: 522936134 title: "Sensi Lite Smart Thermostat, WiFi, Alexa, DIY, Energy Star Certified, ST25" brand: "sensi" price: "€ 128.26" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.hr/products/522936134-sensi-lite-smart-thermostat-wifi-alexa-diy-energy-star-certified store_origin: HR region: Croatia --- # Save 23% HVAC energy Control from anywhere DIY install with built-in level Sensi Lite Smart Thermostat, WiFi, Alexa, DIY, Energy Star Certified, ST25 **Brand:** sensi **Price:** € 128.26 **Availability:** ✅ In Stock ## Summary > 🔥 Upgrade your comfort, save energy, and stay connected—smart living starts here! ## Quick Answers - **What is this?** Sensi Lite Smart Thermostat, WiFi, Alexa, DIY, Energy Star Certified, ST25 by sensi - **How much does it cost?** € 128.26 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/522936134-sensi-lite-smart-thermostat-wifi-alexa-diy-energy-star-certified) ## Best For - sensi enthusiasts ## Why This Product - Trusted sensi brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless DIY Setup:** Built-in level and step-by-step guide make installation a breeze—no pro needed. - • **Privacy First, Always:** Your data stays yours—no selling or ad targeting, guaranteed. - • **Seamless Remote Control:** Top-rated app lets you adjust your home's comfort anytime, anywhere. - • **Voice-Activated Comfort:** Works flawlessly with Alexa, Google Assistant, and SmartThings for hands-free control. - • **Smart Savings, Smarter Home:** ENERGY STAR certified to cut your HVAC energy bills by up to 23%. ## Overview The Sensi Lite Smart Thermostat (ST25) offers easy DIY installation with a built-in level, works with most HVAC systems without a common wire, and is ENERGY STAR certified to save about 23% on energy costs. Control your home's temperature remotely via a top-rated mobile app compatible with Alexa and Google Assistant, all while ensuring your personal data remains private. ## 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. ## 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 | |---------------|-------| | Additional Features | Data Privacy, Easy DIY Install, Energy Savings, Programmable | | Asin | B0BXZ6KXGG | | Best Sellers Rank | #1,793 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #6 in Home Programmable Thermostats | | Brand Name | Sensi | | Color | Black | | Connectivity Protocol | Wi-Fi | | Connectivity Technology | Wi-Fi | | Control Method | App, Touch, Voice | | Control Type | App Control | | Controller Type | Amazon Alexa, Google Assistant, Hand Control, SmartThings | | Customer Reviews | 4.0 4.0 out of 5 stars (2,259) 4.0 out of 5 stars | | Display Type | LCD | | Finish Types | Simple | | Included Components | (2) AAA Batteries, Installation Guide, Mounting Hardware, Sensi Lite Smart Thermostat, Wire Labels | | Item Dimensions D X W X H | 0.88"D x 5.07"W x 3.13"H | | Item Type Name | Smart Programmable Thermostat | | Item Weight | 4.8 ounces | | Manufacturer | Copeland | | Manufacturer Part Number | ST25 | | Manufacturer Warranty Description | 3 years. | | Model Name | Sensi Lite | | Model Number | ST25 | | Mounting Type | Wall Mount | | Number Of Batteries | 2 AAA batteries required. (included) | | Number Of Items | 1 | | Power Source | Battery or C-wire | | Product Style | Simple | | Shape | Rectangular | | Specific Uses For Product | Air Conditioner, Boiler, Furnace, Heat Pump | | Specification Met | Energy Star | | Temperature Control Type | Automatic or Programmable | | Unit Count | 1 Count | | Upc | 786710568732 | | Voltage | 24 volts | ## Product Details - **Brand:** Sensi - **Controller Type:** Amazon Alexa, Google Assistant, Hand Control, SmartThings - **Model Name:** Sensi Lite - **Product Dimensions:** 0.88"D x 5.07"W x 3.13"H - **Special Feature:** Data Privacy, Easy DIY Install, Energy Savings, Programmable ## Images ![Sensi Lite Smart Thermostat, WiFi, Alexa, DIY, Energy Star Certified, ST25 - Image 1](https://m.media-amazon.com/images/I/61baXEIXz8L.jpg) ## Available Options This product comes in different **Color** options. ## 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 ### ⭐⭐⭐⭐⭐ Great Smart Device for the Price. *by on Reviewed in the United States July 6, 2026* I have 3 zones and so 3 of these. Easy to use, works great when coupled with Sensi's room sensors. Eligible for a cashback gift card via PSEG in NY/NJ as of Winter 2026.Pros: Easy to use, accurate temp measurements, works with Alexa seamlessly, blends in with the wall wellCons: 2.4 ghz wifi only - new routers have to be tricked into that mode to get it to initially connect.Note: Some product descriptions of this unit say a common wire is not needed, it most definitely does need one. ### ⭐⭐⭐⭐⭐ No issues yet! See below for tips *by on Reviewed in the United States April 16, 2026* Ordered this "used like new" for under 40 bucks yesterday and and installed it today. Installation and wifi connection took less than15 minutes. However, I did install the app in my phone before I even bought the thing to look at the installation instructions, so I knew what I was getting into. Highly recommend doing that- it asks which wires you have and will tell you if the thing is compatible with your system. I have A/C, and gas heat, and no C-wire.Common issues I see in the bad reviews seem avoidable. You may need to put your Wi-Fi router into temporary 2.4GHz mode to connect, just like you have to do with other smart devices. Once it's connected the app will say it's offline for a minute or 2 but the wifi icon on the thermostat is still visible- I think it's just a lag while your info is uploading to their server. I closed out of the app and reopened it a minute later and was good to go.Easily connected to Google home assistant and Alexa. Alexa doesn't have control features in the Alexa app like Google does I the Home app. But you can say "set the A/C to 72" and it works instantly on both.In the app it shows current indoor temp, and basic current weather condition outdoors as well as indoor humidity which was a nice surprise- I don't have a hygrometer so that's great. There are settings for the stuff people complained about here — a setting to set a temp differential since the unit does seem to be warmer than the air, a setting to slow down or (speed up) cycling if the room temp isn't stable. There's a setting to turn off the backlight so it isn't bright at night.The thermostat interface is very basic for better or for worse. There are just 3 spots to touch on the thermostat itself, right of the display. Up and down, to set the temp, and the third, between the arrows, is the "mode" (unlabeled) signified by with three dots. Touch once to see what temp it's currently set to. Touch again and the mode will switch from heat to a/c or back. I'd just prefer to be able to touch again to go back to the current temp but instead you have to wait a moment for it to go back to default display to see that touching it again will switch modes. Minor annoyance is that you can't turn the fan on from there, which is also an inconvenience for people in the home without the app. And of course any scheduling needs to be done in the app, which is fine with me.Anyway this is long but I hope that helps someone. I'll update if it all goes to schitt lol ### ⭐ Poor connectivity *by on Reviewed in the United States July 22, 2023* I have a home that was built in 2006 and I work in a technical field (engineer) so I am familiar with troubleshooting hardware/software problems. Anyway, my problems with this unit started immediately. During installation, one is supposed to note the letter codes that the existing thermostat is connected to so that the new thermostat can be notified (via wifi and on app on your phone) how to program its terminals to match the original thermostat's functionality. Unfortunately, my existing wire connection was not recognized as being valid by the app (even though my home is relatively new, has a C wire and works properly with the original controller). I didn't let the this deter to me as I was sure I could fine a setup that would work through a little trial/error and voltage measurement. I was able to program my thermostat the first time without any issues; however, the setup I entered didn't work (system produced heat when it should have been cold), so I tried to reprogram the thermostat for a 2nd try. When I searched for my wifi network on the app, I was informed that no networks could be found, which was strange since all my other devices (computers, tablets, TVs, etc) had no issues connecting to my wifi. No problem I thought because I was given the option of entering the name of a network manually, which I did. After entering the name I was asked to enter the network's password twice, which is also strange since double entry is typically required for setting up online accounts, but not for connecting to your own wifi. Anyway, I entered the password twice and things seemed to be okay for a short time, but then the app kept informing me that it was losing its connection to the thermostat. I put the thermostat in "setup" mode by pressing the mode button for 4 seconds, but the thermostat would only stay in setup mode for a few seconds, and whenever it popped out of setup mode, the app would lose its connection again. What was really frustrating is that every time I tried to change the setup, I had to enter the network name and the password twice, which is pretty dumb for a "smart" device! I fought the system for about 2 hours and I was finally able to get another setup programmed, but that one didn't work either. At this point I decided I was done fighting the thing and I returned it. Again, I'm a competent technical person and my heat pump is relatively new and in good working condition. If I can't get it working smoothly, I don't think many others will be able to either. Perhaps I just had a lemon, but my advice is to steer clear of this finicky little monster. ## 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.hr/products/522936134-sensi-lite-smart-thermostat-wifi-alexa-diy-energy-star-certified](https://www.desertcart.hr/products/522936134-sensi-lite-smart-thermostat-wifi-alexa-diy-energy-star-certified) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-08-25*