From across the room or across the country, Sensi makes it easy for you to remotely control and schedule your home comfort – Anytime. Anywhere.
PRIVACY PROTECTION*
Sensi won’t sell your personal information to third parties.
EASY DIY INSTALLATION
Use the built-in level and step-by-step app instructions for a quick installation. Works with HVAC equipment found in most homes. Common wire (c-wire) is not required in most applications.
SAVE ABOUT 23% ON HVAC ENERGY**
The ENERGY STAR-certified Sensi smart thermostat can help you save energy with features like flexible scheduling, remote access and usage reports.
SIMPLE CONFIGURATION
Looks and feels like a thermostat. Has buttons and fits the same space as a traditional thermostat so you don’t have to patch and paint your walls.
SMART MAINTENANCE
Sensi can help monitor the performance and efficiency of your HVAC system by delivering valuable usage reports, alerts about your equipment, and maintenance reminders like filter replacement.
BACKED BY HVAC EXPERTISE
More than 100 years of experience with HVAC systems went into the development of Sensi.
*For full details, review the Sensi Privacy Policy below. Note: if you sign up for a program with a third party, details and terms for that program are between you and the third party, not Emerson. Certain optional add-on services require additional data to operate as intended.
**Calculated by comparing operation time for a nationwide sample of Sensi users with temperature adjustments averaging 4° F in comparison to users with no adjustments. Savings vary based on equipment type/condition, insulation, climate & temperature adjustment size/frequency.
Specifications
Key Specs
- Color: White
- App Compatible: Yes
- Compatible with 24V Cooling: Yes
- Compatible with 24V Heating: Yes
- Works With: Amazon Alexa, Google Assistant, SmartThings, Wink
- Touch Screen: No
- Auto-Away Mode: Yes
- ENERGY STAR Certified: Yes
General
- Brand: Emerson
- Model Number: ST55
- Product Name: Sensi Smart Programmable Wi-Fi Thermostat- Works with Alexa
Dimensions
- Product Height: 3.75 inches
- Product Width: 5.88 inches
- Product Depth: 1 inches
- Product Weight: 0.55 pounds
Power
- Wire Configuration: 3-Wire, C-wire
- Power Source: Hard wired, Battery-powered
- Wire Terminals: RC (cooling power), RH (heating power), G (fan operation), C (common 24v power), Y (cooling), Y2 (cooling stage 2), W (heating), E (emergency heat), W2 (heating stage 2), O (heat pump reversing valve), B (heat pump reversing valve)
- Rechargeable Battery: No
- Battery Size: AA
- Number of Batteries Required: 2
- Number Of Batteries Included: 2
- Voltage Type: Low voltage
Compatibility
- Compatible Product(s): Furnaces, Air conditioners, Heat pumps, Boilers, Other
- Wireless Connectivity: Wi-Fi
- Frequency Band: 2.4 GHz
- Operating System Compatibility: Apple iOS, Apple iPadOS, Android
Features
- Programmable Period: 7 day, 24 hour, 5-1-1 day, 5-2 day
- 24-Hour Programming: Yes
- Backlit: Yes
- Date/Time Display: Yes
- Remote Sensor Capable: No
- Periods Per Programmable Day: 8
- Detector Type: Temperature, Humidity
- Energy Usage and History: Yes
- Furnace Filter Change Indicator: Yes
- Keypad Lock: Yes
Warranty
- Warranty – Parts: 3 Years
- Warranty – Labor: Not Applicable
Specifications
- UPC: 786710554827
