Best 2 Wire Smart Thermostat in 2024: In-depth Reviews

PRIVACY PROTECTION*: Sensi won’t sell your personal information to third parties

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

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

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

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

PRIVACY PROTECTION*: Sensi won’t sell your personal information to third parties

EASY DIY INSTALLATION: Use the built-in level, illuminated easy-click terminals and step-by-step app instructions for a quick installation; Works with the HVAC equipment found in most homes. Common wire (c-wire) is required

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

SLEEK, MODERN DESIGN: The large color display features easy-to-read temperatures and intuitive menus. Available in black, white and silver to complement your home décor

CONTROL FROM ANYWHERE: Remotely control your home comfort from your smartphone or tablet using the Sensi mobile app for Android and iOS devices

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

Save up to 26% per year on heating and cooling costs. ENERGY STAR certified. Automatically adjusts the temperature when you’re away to never heat or cool an empty home. Compared to a hold of 72°F.Compatibility : Works with most 24VAC HVAC equipment, including conventional furnaces and air conditioners (2H/2C), heat pumps (2H/2C + 1 stage AUX heat), boilers, and PTACs or fan coil units with up to 3 fan speeds. 1 wire accessory support for humidifiers, dehumidifiers, and ventilators (HRV/ERV).

Enjoy comfort without compromise. Smart Thermostat Enhanced preheats or precools your home before you arrive, so it’s the perfect temperature the moment you walk in. Automatically adjusts to your desired temperature when you’re home or sleeping to keep you comfortable day and night.

Easy to install and use every day, ecobee Smart Thermostat Enhanced comes with everything you need for installation. Most people install it themselves in about 45 minutes or less. Use your smart home platform and the ecobee app to control your thermostat from anywhere with your smartphone, tablet, or Apple Watch.

ecobee Smart Thermostat Enhanced is made with quality materials and designed to last on your wall for over a decade. It’s hardwired so you never have to worry about losing control or replacing batteries. If you run into problems, our dedicated support team is available 7 days a week.

Add in a SmartSensor which allows you to measure the temperature in rooms that matter most, like the nursery or bedroom. It reads temperature and movement in whatever room it is placed in for complete home monitoring and energy savings (SmartSensor sold separately).

Compatibility : Works with most 24VAC HVAC equipment, including conventional furnaces and air conditioners (2H/2C), heat pumps (2H/2C + 1 stage AUX heat), boilers, and PTACs or fan coil units with up to 3 fan speeds. 1 wire accessory support for humidifiers, dehumidifiers, and ventilators (HRV/ERV).

Advanced control from anywhere using your Android or iOS device

Integrates seamlessly with your preferred smart home system

Energy Star certified, plus you can save up to 23% annually on heating and cooling costs. Compared to a hold of 72°F

Add SmartSensor to manage hot or cold spots and deliver enhanced comfort to the rooms that matter most

Thoughtfully designed to illuminate when you’re nearby. Check the temperature, humidity, and 5-day weather forecast

Includes 1 SmartSensor and 1 SmartSensor for doors and windows

Smart upgrade - Amazon Smart Thermostat is an easy way to switch from a traditional thermostat and help reduce energy usage.

Save money - After purchase, Amazon will send you an email with details about rebates that may be available from energy providers in your area. Explore rebates above.

Save energy - According to EPA estimates, ENERGY STAR certified thermostats save an average of $50 on yearly energy bills.

Automatic comfort - Alexa can do the programming for you, updating the temperature to keep you comfortable.

On-the-go control - Let Alexa set the temperature, or set it yourself from anywhere with the Alexa app.

You can do it - The Alexa app will guide you through the installation process, but customer service is always available.

Reliable - Made with Honeywell Home Thermostat Technology and backed by 130 years of experience.

ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Product note: You can also check your system’s compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page

The Nest Thermostat is designed to work without a C wire in most homes, but for some systems, including heating only, cooling only, zone controlled, and heat pump systems, you’ll need a C wire or other compatible power accessory. Lock feature: No

Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home; easily program an energy efficient schedule in the Google home app on your Android or iPhone

Remote control lets family members change the thermostat temperature from anywhere on a phone, laptop, or tablet[1]

Savings Finder looks for more ways your thermostat can help you save, and suggests tweaks to your schedule in the app; check with your energy provider to learn more about rebates and more ways to save on a Nest thermostat

Smart thermostat with HVAC monitoring, which looks out for your heating and cooling systems; sends an alert if something doesn’t seem right, along with helpful reminders to make maintenance easier[2]

It’s easy to install your thermostat, typically in 30 minutes or less, with everything you need included in the box; it’s compatible with 85% of heating and cooling systems

Control the temperature with your voice using smart home devices that work with Google Assistant or Alexa[3]

Nest Renew makes it simple to support clean energy right from home; it works with your Nest Thermostat[5] to help you automatically prioritize your usage[6] to times when energy is cleaner or less expensive

Please refer to the product description section below for all applicable legal disclaimers denoted by the bracketed numbers in the preceding bullet points (e.g., [1], [2], etc.)

Optional power adapter included - Wi-Fi thermostats typically require extra power via a "C" wire. Many homes lack this wire, so this adapter gives you a simple, low-voltage alternative. It's easy to install and fits discreetly near your heating and cooling system. Extra power via a “C” wire. Many homes lack this wire, so this adapter gives you a simple, low Voltage alternative. It's easy to install and fits discreetly near your heating and cooling system

7-day flexible scheduling or location based temperature control - it’s your choice. 7-day scheduling programs your thermostat. Geofence technology helps make you comfortable by using your smartphone's location to know when you're away and when you return. Programs your thermostat. Geofence technology helps make you comfortable by using your smartphone’s location to know when you’re away and when you return

Smart alerts - push notifications remind you to change your filter and warn you of extreme indoor temperatures

Auto change from heat to cool - automatically determines If your home needs heating or cooling to provide maximum comfort

Fan operation* custom Fan settings to circulate more or less air, as needed, to keep air moving throughout your home. Fan control dependent on wiring configuration

Energy Star certified

This Wi-Fi smart home thermostat enables you to set your clock, read outdoor temperatures, automate temperature control, and program remotely through the Watts Home mobile app which is available for iOS and Android devices

Smart home compatible with Amazon Alexa and Hey Google for home automation voice control and you can enable remote software updates

It has a modern and sleek design; a 4.3 inch digital touchscreen display; three home screen options: clock, control settings, or weather; and portrait and landscape mounting options.

This floor heating thermostat can compensate for outdoor weather conditions, auto shut-off for warm weather temperatures, and there is also a maximum floor temperature setting to protect different types of flooring

Track your energy use, receive email/text notifications, and access away terminal features at home or remotely as a well as connect to optional equipment: SunStat Rely R4 and ConnectPlus Smart Sensor

There are multiple support and data features such as heat output, a voltage detector, momentary testing, a diagnostic screen, an easy set up function, a help feature, and works with 120 and 240 voltage.

Save Energy: With customizable routines that conserve energy when you’re away and daily energy reports, you can create a greener home and reduce your energy costs.

Room-to-Room Comfort: Connect up to 16 Levoit sensors (sold separately) to the smart thermostat, helping you to monitor each room and pick the most comfortable temperature for you.

24/7 Scheduling: Customize routines that will automatically adjust the temperature for you without the need for manual changes.

Control From Anywhere: Let Amazon Alexa or Google Assistant adjust the temperature at your command when you connect your thermostat to the free VeSync app.

Eco Level Setting: Select an Eco level to set your thermostat's energy usage and temperature precision. A higher Eco level focuses on energy efficiency, but will not control temperature as precisely.

Smart Scenes: Take control of your home's atmosphere by connecting Levoit sensors, smart humidifiers, and smart air purifiers to the thermostat with the VeSync app.

User-Friendly Touchscreen: The 4-inch, high-resolution display automatically adjusts its brightness based on the amount of light in the room, allowing you to easily view your indoor temperature, humidity, and the weather forecast.

Easy HVAC Monitoring: Receive notifications when there’s a system malfunction or when your indoor temperature goes outside your preferred range.

High Compatibility: This thermostat comes with a C-wire adapter and is compatible with Heating and Cooling Systems, Cooling Only System, Heat Pump Systems, and more. Does NOT work with heating only systems(No C-wire) or high voltage systems(120V-240V).

Easy to Install: The average DIY installation takes about 35 minutes. Simply follow the step-by-step installation guide in the VeSync app.