Sensi

The Emerson Sensi ST75 Touch Wi-Fi Smart Thermostat is designed for homeowners looking to upgrade their HVAC control with smart features. It suits those with existing C-wire setups who want remote access, energy savings, and integration with voice assistants like Alexa, Google Assistant, and Apple HomeKit. With over 100 years of Emerson HVAC expertise behind it, this thermostat delivers reliable performance for furnaces, heat pumps, boilers, and air conditioners.

Standout features include a vibrant 4.3-inch color touchscreen for easy navigation, geofencing for automatic adjustments, and usage reports that help optimize energy use, potentially saving 23% on bills. Users praise the app's simplicity for setting schedules and receiving maintenance alerts, with real-world feedback highlighting quick installs and consistent comfort at cabins or primary homes. It excels in smart maintenance by monitoring system efficiency and sending filter reminders.

The build quality features a glossy black plastic design with dimensions of 5.625 x 3.4 x 1.17 inches, blending into modern interiors. The backlight and intuitive menus make it user-friendly day or night, and keypad lockout adds security. Reviewers note its sleek look and responsive touch interface outperform pricier competitors in reliability.

Drawbacks include the mandatory C-wire, which may require wiring tweaks, and occasional Wi-Fi hurdles with dual-band routers needing separate 2.4 GHz SSIDs. International users report app limitations outside North America. Overall, the Sensi ST75 offers exceptional value for reliable, privacy-focused smart control.

Verdict: Highly recommended for tech-savvy homeowners prioritizing ease, savings, and integration. It transforms basic thermostats into efficient smart hubs without unnecessary complexity.

Key Specs:

• Model: ST75
• Display: 4.3-inch Touchscreen Color
• Connectivity: Wi-Fi 2.4 GHz, App Control, Voice Control
• Compatibility: Alexa, Apple HomeKit, Google Assistant, SmartThings
• Power: C-wire Required (AC/DC, 30V)
• Dimensions: 5.625" x 3.4" x 1.17"
• Features: Programmable, Geofence, Filter Indicator, Auto Changeover, Energy Star Certified
• Warranty: 3 Years

The Sensi ST55 is a Wi-Fi enabled smart thermostat designed for homeowners looking to upgrade their HVAC control without hassle. It suits most residential systems including furnaces, heat pumps, boilers, and AC units, especially those without a common C-wire. Backed by Emerson's century of HVAC expertise, it offers programmable scheduling, remote access, and Energy Star certification for real energy savings.

Standout performance shines in its app-guided setup, where users snap photos of existing wiring, label wires with provided flags, and follow step-by-step instructions. Reviewers praise its flawless operation post-install, with remote temperature adjustments working seamlessly from anywhere. Features like usage reports reveal runtime patterns, humidity control, and maintenance alerts help extend HVAC life and cut costs by about 23%.

Build quality feels solid with a simple button interface, backlight display, and wall-mount design that matches traditional thermostats. The compact plastic unit (5.88 x 3.75 x 1 inches) includes a built-in level for straight mounting and runs on batteries or C-wire, avoiding electrician fees.

Minor drawbacks include less detailed daily reports and rare setting glitches fixed by brief waits. Overall, the ST55 delivers reliable smart functionality at an accessible level, earning high marks for ease and value. Ideal for DIY enthusiasts seeking privacy-focused smart home integration.

Controller Type: Amazon Alexa, Google Assistant, SmartThings, Vera. Connectivity: Wi-Fi (2.4 GHz). Power: Battery or C-wire (24V AC), includes AAA batteries. Dimensions: 5.875 x 3.75 x 1 inches. Display: LED with backlight. Special Features: Data privacy, easy DIY install, energy savings, filter indicator, programmable. Warranty: 3 years.

Download the Sensi app before removing your old thermostat. Photograph wires, label with provided stickers per app directions, and use the built-in level on the wall plate. No C-wire needed in most cases; batteries power it. Setup takes 15-30 minutes even for beginners.

The Sensi Touch 2 Smart Thermostat is a Wi-Fi enabled, touchscreen device built for homeowners seeking smarter HVAC control without professional help. It suits those with compatible U.S. and Canadian systems featuring a C-wire, offering remote access, scheduling, and integration with Alexa, Google Assistant, and SmartThings.

Key features shine in real-world use: flexible 7-day schedules and geofencing optimize comfort and cut energy use by about 23%, while room sensor compatibility evens out temperatures across rooms. Reviewers praise the app's clear installation guidance, reliable performance with heat pumps and furnaces, and maintenance alerts that boost system efficiency. The display provides crisp feedback, and voice control adds convenience.

Design emphasizes a slim, white beveled-edge rectangular form with LCD touchscreen and backlight, drawing from 100 years of HVAC expertise. Build quality feels premium, with Energy Star certification ensuring reliability. It's wall-mounted and hardwired at 24V AC.

Drawbacks include the C-wire requirement, which limits some older setups, and occasional WiFi pairing issues during initial setup. Advanced users note restrictions on certain settings like aux lockout temperatures.

Verdict: A top performer for DIY enthusiasts wanting energy savings, privacy, and smart features. Highly recommended over basic models for its balance of ease and power.

Controller Type: Amazon Alexa, Google Assistant, Hand Control, SmartThings

Connectivity: Wi-Fi, Bluetooth

Power Source: Hardwired, 24 Volts AC, C-wire required

Display: LCD Touchscreen with backlight

Dimensions: 0.77in D x 5.6in W x 3.25in H, 0.62 lbs

Compatibility: Air Conditioner, Boiler, Furnace, Heat Pump

Special Features: Data Privacy, Easy DIY Install, Smart Maintenance, Title 24 Compliant, Works with Room Sensors

Warranty: 3 years

Users love the easy DIY setup, with many completing installs in under 30 minutes thanks to app videos and instructions. Energy savings and efficient heat pump operation stand out, reducing gas use significantly.

The app enables quick adjustments from bed or desk, and remote sensors improve whole-home balance. Praise for sleek design and intuitive interface over older models like Honeywell.

Some note WiFi setup pin changes cause retries, and a few face connection drops or setting limits for cold-climate heat pumps.

The Sensi Touch 2 Smart Thermostat (ST76) is a Wi-Fi enabled device designed for homeowners with compatible HVAC systems, including furnaces, heat pumps, boilers, and air conditioners that have a C-wire. It targets users seeking smart control without professional installation, offering remote access, scheduling, and integration with Alexa, Google Assistant, and SmartThings. Built on over 100 years of HVAC expertise from Emerson, it prioritizes ease, efficiency, and privacy.

Standout features include a vibrant touchscreen color display, flexible 7-day scheduling, geofencing for location-based adjustments, and compatibility with Sensi room sensors for even temperature distribution. Real-world performance shines in reviews, with users reporting dramatic gas savings from automatic heat pump switching, reliable app control, and quick setups under 30 minutes. Energy Star certification backs claims of 23% average HVAC savings through usage reports and maintenance reminders like filter alerts.

Design is modern and slim with a black beveled edge, wall-mounted for a clean look, and the app provides Bluetooth-guided install with custom wiring instructions. Build quality feels premium, earning praise for reliability over older models, though some note WiFi hiccups during setup resolved by using the dynamic PIN.

Drawbacks include the C-wire requirement, excluding some older systems, and occasional issues like rigid heat pump lockout settings or WiFi drops needing internet for full function. No local API limits offline control.

Overall, the Sensi Touch 2 excels for DIY enthusiasts wanting affordable smart comfort with proven savings and privacy. It earns high marks for value if your setup matches, making it a strong upgrade from basic programmable thermostats.

Connectivity: Wi-Fi, Works with Amazon Alexa, Google Assistant, SmartThings

Power: 24V Common Wire (C-wire) Required

Display: LCD Touchscreen with Backlight

Compatibility: Heat Pump, Furnace, Boiler, Air Conditioner; Sensi Room Sensors

Dimensions: 5.6"D x 3.25"W x 0.77"H, 0.62 lbs

Special Features: Energy Star Certified, Title 24 Compliant, Smart Maintenance Alerts

Warranty: 3 Years

The Sensi Lite ST25 is a programmable WiFi smart thermostat designed for easy integration into most home HVAC systems, ideal for DIY enthusiasts wanting smart control without professional help. It supports air conditioners, boilers, furnaces, and heat pumps, with no C-wire needed for the majority of setups, making it accessible for older homes.

Standout features include a top-rated mobile app for iOS and Android that enables remote temperature adjustments, flexible scheduling, geofencing, and usage reports to cut energy use by up to 23%. Users praise its quick setup via video and app instructions, compatibility with Alexa and Google Assistant, and clear LCD display. Real-world performance shines in app control and energy savings, with many noting rebates from utilities and smoother operation on steam boilers or pulse furnaces.

Build quality reflects over 100 years of Emerson HVAC expertise, with a sleek black rectangular design, wall mount, and included batteries plus hardware. The backlight and filter indicator add practicality, though the display lacks a dimmer.

Drawbacks include occasional WiFi drops, mandatory C-wire for certain systems, and reduced smart functionality outside North America. Despite these, its value and reliability earn high marks from verified buyers.

Verdict: A solid choice for budget-conscious homeowners seeking simple smart thermostat upgrades with proven energy savings and hassle-free install.

Connectivity: Wi-Fi, works with Amazon Alexa, Google Assistant, SmartThings

Power: Battery (2 AAA included) or C-wire, 24 Volts

Dimensions: 0.88"D x 5.07"W x 3.13"H, 4.8 ounces

Features: Programmable, Auto Changeover, Filter Indicator, Daylight Savings Ready

Warranty: 3 years, ENERGY STAR certified

Check your wiring before purchase: Use the Sensi app's compatibility tool to scan old thermostat wires. No C-wire needed for most 4-wire systems, but required for heat/cool-only or heat pumps.

Ensure 2.4GHz WiFi; position near router for best connectivity. Ideal for US/Canada users due to location-based features.

Watch installation videos for success, especially on older two-wire heaters.