---
product_id: 533393824
title: "Sensi 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: "HK$2284"
currency: HKD
in_stock: true
url: https://www.desertcart.hk/products/533393824-sensi-lite-smart-thermostat-data-privacy-programmable-wi-fi-mobile
store_origin: HK
region: Hong Kong
---

# Energy Star Certified Mobile App Control Data Privacy Protection Sensi 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:** HK$2284
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate Your Comfort, Empower Your Savings!

## Quick Answers

- **What is this?** Sensi 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?** HK$2284 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/533393824-sensi-lite-smart-thermostat-data-privacy-programmable-wi-fi-mobile)

## 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

- • **Privacy First:** Your data stays yours—no selling or targeting from Sensi.
- • **Compatible with Alexa:** Seamless integration for voice control and smart home convenience.
- • **Save Big on Energy Bills:** Cut HVAC costs by approximately 23% with smart scheduling and geofencing.
- • **Control at Your Fingertips:** Manage your home's comfort from anywhere with a top-rated mobile app.
- • **DIY Installation Made Easy:** Fast setup with built-in level and step-by-step instructions.

## Overview

The Sensi Lite Smart Thermostat (Model ST25) is a cutting-edge, Energy Star certified device designed for easy DIY installation and optimal energy savings. With features like mobile app control, geofencing, and robust data privacy, it ensures you stay comfortable while protecting your personal information. Compatible with Alexa, this thermostat is perfect for the modern home.

## Description

Sensi 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!**

## 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 |
|---------------|-------|
| Brand | Emerson |
| Model Number | ST25 |
| Colour | Black |
| Product Dimensions | 2.24 x 12.88 x 7.95 cm; 136.08 g |
| Voltage | 24 Volts |
| Special Features | Filter Indicator, Low Voltage, Auto Changeover, Daylight Savings Time Ready, Programmable |
| Item Weight | 136 g |

## Product Details

- **Brand:** Emerson
- **Model name:** Sensi Lite
- **Product dimensions:** 2.2D x 12.9W x 8H centimetres
- **Controller type:** App Control
- **Special feature:** Filter Indicator, Low Voltage, Auto Changeover, Daylight Savings Time Ready, Programmable
- **Colour:** Black
- **Specific uses for product:** Boiler, Air Conditioner, Heat Pump, Furnace
- **Temperature Control Type:** Programmable
- **Connectivity technology:** Wi-Fi
- **Included components:** Installation Guide, Sensi Lite Smart Thermostat, Mounting Hardware, Wire Labels, (2) AAA Batteries

## Images

![Sensi 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/41hms-xFcSL.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.

## 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)

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**Shop now:** [https://www.desertcart.hk/products/533393824-sensi-lite-smart-thermostat-data-privacy-programmable-wi-fi-mobile](https://www.desertcart.hk/products/533393824-sensi-lite-smart-thermostat-data-privacy-programmable-wi-fi-mobile)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-02-27*