Emerson Sensi Wi-Fi Thermostat Model #ST55C

$219.00 $199.00


From across the room or across the country, your Sensi Wi-Fi thermostat makes it easy to remotely control and schedule your home comfort – Anytime. Anywhere. Sensi thermostat does not require a common wire (c-wire) for most installations, so it is compatible with the HVAC equipment in many homes*** in U.S. & Canada. A c-wire is required for heat-only, cool-only and heat pump (without aux) systems, and for use with Apple HomeKit. Check to make sure it will work for you at Put your comfort on your terms with geofencing or 7-day scheduling option with the ENERGY STAR certified Sensi thermostat. Both energy saving features you save about 23% on your HVAC energy usage* so you can save money without compromising your comfort. *Energy savings calculated by comparing operation time for a nationwide sample of Sensi users with temperature adjustments averaging 4 degree F vs users with no adjustments. Savings vary based on equipment type/condition, insulation, climate & temperature adjustment size/frequency. **Based on survey results of 2120 respondents that purchased and installed a Sensi thermostat in 2018, approximately 70% reported installing in 30 minutes or less. Adding a common wire may impact installation time. ***Does not work with electric baseboard heat and some other systems. System requirements for mobile app: iOS – 10.0 or above Android – 4.2 or above (5.0 or greater to use the Geofencing feature)

  1. Named the ‘Best Value’ smart thermostat of 2018 by USA Today’s
  1. SAVE ABOUT 23% ON HVAC ENERGY *: 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 energy usage reports
  1. GET REBATES: Find utility rebates in your area through the rebate finder at
  1. MOST INSTALL IN 30 MINUTES OR LESS**: With step-by-step instructions and video tutorials right in the mobile app, most people install Sensi in 30 minutes or less
  1. EXTENSIVE COMPATIBILITY***: Works with the HVAC equipment found in most homes  a c-wire is required for heat-only, cool-only and heat pump systems without aux
  1. SMART HOME COMPATIBLE: Works with Amazon Alexa, Google Assistant, Apple HomeKit (c-wire required) and Wink smart home platforms

Energy Star rated product.

Warranty from manufacturer only.

No returns on this item.  Sales on this item are final.

Additional information

Weight 39 kg
Dimensions 4 × 8 × 23 cm


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