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Black rectangular smart thermostat with touchscreen display and built-in level

Sensi Lite Smart Thermostat WiFi Alexa ST25 Black

SKU CH-70G9-6KC88

A Wi-Fi thermostat with Alexa voice control that saves about 23% on HVAC energy through flexible scheduling, geofencing and usage reports

  • ColorBlack
  • Save about 23% on HVAC energy with ENERGY STAR certification and smart scheduling
  • Easy DIY installation using built-in level and step-by-step guidance for most HVAC systems
  • Control from anywhere via top-rated Android and iOS mobile app
  • Privacy protection — personal data never sold or used for advertising
  • Proven performance backed by over 100 years of HVAC experience

Sensi Lite Smart Thermostat ST25

The Sensi Lite ST25 is a new Wi-Fi thermostat that connects to home HVAC systems. It supports Alexa voice control and is managed through a top-rated mobile app for Android and iOS. Installation is designed for DIY with a built-in level and step-by-step instructions. The unit carries ENERGY STAR certification and a black finish.

Suits most residential systems.

This thermostat works with the HVAC equipment found in most homes, including heat pumps. A common wire is required for heat pump, heat-only and cool-only systems, so buyers whose wiring lacks a C-wire on those configurations should look elsewhere. The platform pledges not to sell personal data or use activity data for advertising. Remote access, geofencing and usage reports are included.

ENERGY STAR certification drives the 23 % saving

The single specification that decides fit is ENERGY STAR certification, which underpins the claimed 23 % reduction in HVAC energy use. Features such as flexible scheduling, geofencing and maintenance alerts all feed that efficiency target. If the project does not require a certified device with those savings features, another thermostat may be simpler.

Highlights

  • Save about 23% on HVAC energy with ENERGY STAR certification and smart scheduling
  • Easy DIY installation using built-in level and step-by-step guidance for most HVAC systems
  • Control from anywhere via top-rated Android and iOS mobile app
  • Privacy protection — personal data never sold or used for advertising
  • Proven performance backed by over 100 years of HVAC experience

Specifications

BrandSensi
ColorBlack

Questions about this item

Which Sensi Lite model should I choose if I want WiFi and Alexa control?

The ST25 is the only model listed; it includes WiFi connectivity and Alexa voice control out of the box.

What does the 23% energy saving figure mean once the thermostat is running?

The 23% reflects average HVAC energy reduction from features like flexible scheduling, geofencing and usage reports in real homes.

What interface does the ST25 use and what does it cap in practice?

It connects via WiFi, so remote control and app features are limited by your home network's reach and stability.

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