Emerson Sensi ST55U Smart Wi-Fi Thermostat White Programmable Alexa Google NIB

Stay connected and in control with the Emerson Sensi ST55U Smart Wi-Fi Thermostat in white. Designed to work seamlessly with your phone, this smart thermostat makes it easy to adjust your home’s comfort from anywhere while keeping the familiar look of a traditional thermostat. Its standard footprint helps avoid extra wall patching or painting, and for most systems, no c-wire is required, making installation much easier. With features like smart alerts, humidity monitoring, energy usage tracking, and compatibility with popular smart home platforms, this is a great upgrade for homeowners looking for convenience, efficiency, and reliable comfort control.

Item Details:
Brand: Emerson / Sensi
Model: ST55U
Type: Smart Wi-Fi Thermostat
Color: White
Programmable: Yes
Connectivity: 2.4 GHz Wi-Fi, Bluetooth Low Energy
Smart Home Compatibility: Amazon Alexa, Google Assistant, Apple HomeKit (c-wire required), Samsung SmartThings
System Compatibility: Most conventional heating and cooling systems, including single-stage and multi-stage systems, plus many heat pumps
Power Requirements: 20 to 30 VAC, 50/60 Hz
Dimensions: 5.1"W x 3.1"H x 0.88"D
Key Features: No c-wire required for most systems, smart alerts, humidity monitoring, energy reports, circulating fan, keypad lockout, temperature limits, app control
Installation: Easy DIY installation with guided app setup
Condition: Pre-owned / see photos for exact cosmetic condition and included contents

Treasure Hunter’s Note:
A smart and practical home upgrade from Emerson, the Sensi ST55U is a popular choice for easy installation, strong compatibility, and app-based comfort control without overcomplicating your setup.