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Emerson Sensi Wi-Fi Thermostat ST55U

by Emerson
Original price $129.00 - Original price $129.00
Original price
$129.00 - $129.00
Current price $129.00
in stock

From across the room or across the country, your Sensi™ Wi-Fi thermostat makes it easy to remotely control and schedule your home comfort. Designed to work with the wires you already have, Sensi thermostat does not require a common wire (c-wire) for most installations, so it is compatible with the HVAC equipment in many homes. A c-wire is required for heat-only, cool-only, and heat pump (without aux) systems.

  • The Energy Star certified Sensi thermostat helps you save on your HVAC energy costs, with features like geofencing, 7-day flexible scheduling, remote access, and in-app system usage
  • Most install in 30 minutes or less
  • Extensive compatibility
  • Smart home compatible: works with Amazon Alexa, Google Assistant, Apple HomeKit (c-wire required), and Samsung SmartThings
  • Monitor current day and historical heating, cooling, and fan runtime right in the app
  • Remotely control your home comfort from your smartphone or tablet using the Sensi mobile app for Android and iOS devices
  • Sensi features smart alerts to help detect extreme temperature and humidity levels in your home

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    Product Specifications

    Display5 inch LCD screen
    Dimensions and weight

    Width: 5.9 in

    Height: 3.8 in

    Depth: 1 in

    Weight: 8.5 oz

    Wire terminals

     RC               Y2

    Rh               W/E (AUX 1)

    G                 W2 (AUX 2)

    C                 O/B

    Y                  L

    Wi-Fi & security

    Wi-Fi 802.11b/g/n @ 2.4 GHz

    WPA and WPA 2 encryption methods

    Smart home integrations

    Apple HomeKit

    Google Assistant

    Amazon Alexa

    Samsung SmartThings


    Energy Star certifiedYes
    Mobile app

    Free app for iOS 10 or later and Andriod.

    Can control multiple thermostats from one account.

    Temperature range

    Setpoint range: 50° to 99°F

    Display: 32° to 99°F

    Operating: 32° to 150°F

    Humidity rangeDisplay: 0% to 100% RH
    Powering methods

    Battery: 2 AA batteries

    Wired: 20 to 30 VAC through terminals C and Rc or Rh

    NEC class II, 50/60 Hz


     -20° to 150°F

    0% to 90% RH (non condensing)

    Languages English
    Warranty3 year warranty
    In the box

    Sensi (Wi-Fi) Smart Thermostat

    Thermostat base

    Mounting hardware

    Quick-start guide

    Wire labels

    Security code card

    2- AA batteries

    Carbon-neutral shipping with Shopify Planet
    Carbon-neutral shipping on all orders
    shipping emissions removed
    That's like...
    miles driven by an average gasoline-powered car
    We fund innovations in...
    Direct Air Capture
    Bio Oil

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