Emerson Sensi ST55 Smart Thermostat - Wi-Fi, Programmable, Works With Alexa
✨ Upgrade your home with the Emerson Sensi ST55 Smart Thermostat ✨
Ever wished your thermostat was as smart as your phone? Well, now it can be. The Emerson Sensi ST55 is a breeze to install yourself—no common wire needed, and it plays nice with most HVAC systems. Plus, it’s not just smart; it’s thrifty, too. Think 23% energy savings thanks to flexible scheduling and a mobile app that’s so good, it’s practically showing off.
And here’s something you don’t hear every day: Privacy Protection. That’s right, Sensi keeps your data to itself, no selling to third parties. Because your thermostat shouldn’t be gossiping about your heating habits.
It’s also got your back with Smart Maintenance. Imagine getting a nudge when it’s time to change your filter or if your HVAC starts acting up. Handy, right?
Compatibility? Check. Whether you’re team Alexa or Google Assistant, this thermostat fits right in. Voice control isn’t just cool—it’s downright lazy (in the best way).
And because we’re all trying to save the planet (and our wallets), it’s Energy Star Certified. Lower bills and a smaller carbon footprint? That’s what we call a win-win.
General specs
- Brand: Emerson
- Model: ST55
- Seller: Amazon
- Product Dimensions: 1"D x 5.88"W x 3.75"H
- Controller Type: Vera, Google Assistant, Amazon Alexa, SmartThings
- Special Features: Filter Indicator, Clock Display, Fan Control, Auto Changeover, Daylight Savings Time Ready
- Specific Uses For Product: Boiler, Air Conditioner, Heat Pump, Furnace
- Temperature Control Type: Programmable, Smart/Remote
- Connectivity Technology: Wi-Fi
- Included Components: Thermostat, free mobile app, 2 AA batteries, mounting hardware, wire stickers, installation guide, welcome guide with Sensi code, warranty booklet
- Power Source: Corded Electric
- Item Weight: 13.6 ounces
- Voltage: 24 Volts (AC)
- Material: Plastic
- Shape: Rectangular
- Display Type: LED
- Screen Size: 5 Inches
- Control Type: Button Control
- Control Method: Voice
- Connectivity Protocol: Wi-Fi
- Mounting Type: Wall Mount
- Style: DIY
- Backlight: Yes
- Number of Batteries: 1 AAA batteries required. (included)
- Warranty Description: 3 years.
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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Shipping options
United States
Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
Emerson ST55 White
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ecobee EB-STATE7-01
|
Honeywell Home RTH9600WF2022
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ecobee EB-STATE6L-01 Black
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Honeywell Home RCHT9610WFSW2003 T9 White
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meross MTS300 Matter multi-platform compatibility
|
|
| Brand | Emerson | ecobee | Honeywell Home | ecobee | Honeywell Home | meross |
| Model | ST55 | EB-STATE7-01 | RTH9600WF2022 | EB-STATE6L-01 | RCHT9610WFSW2003 T9 | MTS300 |
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| Price | $77.95 | $129.99 | $179.99 | $167.99 | $178.00 | $74.99 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | May 11, 2025 | May 11, 2025 | May 13, 2025 | May 13, 2025 | May 13, 2025 | May 12, 2025 |
| Product Dimensions | 1"D x 5.88"W x 3.75"H | 0.94"D x 4.09"W x 4.09"H | 0.94"D x 3.7"W x 4.92"H | |||
| Controller Type | Vera, Google Assistant, Amazon Alexa, SmartThings | Apple HomeKit, Google Assistant, Amazon Alexa, iOS, Android | Vera, Google Assistant, Amazon Alexa, SmartThings | |||
| Connectivity Technology | Wi-Fi | Wi-Fi | Wi-Fi | |||
| Power Source | Corded Electric | Corded Electric | Battery Powered | |||
| Voltage | 24 Volts (AC) | 24 Volts | 240 Volts | |||
| Material | Plastic | Metal | Plastic | |||
| Display Type | LED | LCD | LCD | |||
| Mounting Type | Wall Mount | Wall Mount | Wall Mount | |||
| product_dimensions | 0.91"D x 3.62"W x 3.62"H | 1"D x 4.75"W x 3.5"H | 0.9"D x 3.6"W x 3.6"H | |||
| controller_type | Apple HomeKit, Google Assistant, Amazon Alexa, iOS, Android | IFTTT, Google Assistant, Amazon Alexa, iOS, Android | Apple HomeKit, Google Assistant, SmartThings, Amazon Alexa, Android | |||
| special_feature | Temperature Display, Auto-Scheduling, Auto-Away Mode, Fan Control, Programmable | Smart Response Technology, Selectable Color Touchscreen, Works with Amazon Alexa, ENERGY STAR certified | Portable, Temperature Display, Lockable, Low Voltage, Programmable | |||
| specific_uses_for_product | Electric Baseboard Heater, Air Conditioner, Furnace | Furnace | Boiler, Air Conditioner, Heat Pump, Furnace, Dehumidifier | |||
| temperature_control_type | Cooling | Heating and Cooling | Heating and Cooling | |||
| connectivity_technology | Wi-Fi | Wi-Fi | Wi-Fi | |||
| included_components | Screws & Drywall Plugs, ecobee SmartThermostat, Backplate, Wire Labels | Smart Color Thermostat, Mounting Hardware, Quick Start Guide | Smart Wi-Fi Thermostat x 1, Screws and Anchors x 3, Wiring Sticker x1, User Manual x1, Trim Plate x1, Backplate x1 | |||
| power_source | Battery Powered | Battery Powered | Corded Electric | |||
Smart Thermostat, Wi-Fi, Programmable, Works With Alexa, Energy Star Certified
Reviews
Anna Perez
April 4, 2025
Duke
April 2, 2025
Rainbow
April 1, 2025