10 Best 4 Wire Smart Thermostat On The Market

【Widely Applicable】Our smart thermostat is compatible with a variety of systems, widely applicable to your home, let you easily enjoy the convenient, quick and comfortable feeling. Supports natural gas, steam, hot water, electric, or gravity, gas fireplaces (24 Volts), oil heat sources. Conventional (2H/2C); Heat Pump (4H/2C).

【Advanced HVAC Control】Smart alarm (heating or cooling alarm and air filter replacement reminder), geofencing, weather forecast, equipment password lock, adjustable backlight brightness level, regular circulation of fresh air to maintain comfort and health, etc.

【Control Everywhere】 Work with Amazon Alexa and Google Home, and you can also order through our intelligent ios or android applications. You can seamlessly control all connected devices without even lifting your finger.

【Time Schedule】 It can be programmed for 7 days, and 4 periods are available. Setting the schedule automatically changes the temperature to adapt to your life and work.

【Energy Saving】 Saving about 23 percent of HVAC energy not only through the program, automatic heating and cooling conversion helps greatly.

【Easy to Install and Operate】Easy to read touch screen makes operation simple. The new equipment used for room temperature control is equipped with wall panels, screws, labels, remote sensors, especially the power module that is suitable for your home without C cable. If you have any questions, please contact us for professional help.

Save up to 23% annually on heating and cooling costs (compared to a hold of 72°F)

Control from anywhere using your Android or iOS device

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

Automatically pauses your heating or cooling when a door or window is left open (requires ecobee SmartSensor for doors and windows and a Smart Security subscription)

PLAYS WELL WITH OTHERS: ecobee3 lite works with your favorite smart home setups, including Apple HomeKit, Amazon Alexa, Google Assistant, Microsoft Cortana, Samsung SmartThings, Wink, and IFTTT

WORKS WITH ROOM SENSORS: Place them in the rooms that matter the most and have the temperature balanced throughout your whole home. Measuring both occupancy and temperature, sensors signal your ecobee Smart Thermostat to automatically switch to the right mode for comfort when you’re home or for savings when you’re not. 2-pack sold separately.

EASILY INSTALL YOURSELF: It only takes about 30 minutes, thanks to an easy to follow installation guide and an in-app step-by-step walkthrough. Everything you need comes in the box, including a Power Extender Kit for homes with no common wire (C-wire)

SAVE MONEY: Homeowners save up to 23% annually on heating or cooling costs, plus ecobee pays for itself in under 2 years (compared to a hold of 72 degrees).

ROOM SENSORS: Place them in the rooms that matter the most and have the temperature balanced throughout your whole home. Measuring both occupancy and temperature, sensors signal your ecobee Smart Thermostat to automatically switch to the right mode for comfort when you’re home or for savings when you’re not. One Room Sensor included, 2-pack sold separately

EASILY INSTALL YOURSELF: It only takes about 30 minutes, thanks to an easy to follow installation guide and an in-app step-by-step walkthrough. Everything you need comes in the box, including a Power Extender Kit for homes with no common wire (C-wire). Compatibility- Gas, oil, electric, dual fuel, Conventional (2H/2C), Heat Pump (4H/2C), Humidifier, Dehumidifier, Ventilator, HRV or ERV

CONTROL FROM ANYWHERE: Easily adjust your thermostat from wherever you are using your iOS (iPhone, iPad, Apple Watch) or Android device. The ecobee mobile app is available in the App Store or on Google Play. Works with: Apple Homekit, Amazon Alexa, Samsung SmartThings, IFTTT and more.

BUILT-IN ALEXA: Control your thermostat using your voice with built-in Alexa. Ask to play music, hear the news, set a timer, adjust the temperature, and so much more. Wifi connectivity is ieee 802.11 b/g/n at 2.4 GHz. Tip-make sure your HVAC panel is fully closed. Some systems will not turn on if the cover panel has not been closed properly.Voltage Type:Line Voltage

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).

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

No more programming: With Auto-Schedule, the Google Nest Learning Thermostat learns from you and programs itself..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

Home/Away Assist: don't heat or cool an empty home. Home/Away Assist adjusts the temperature after you leave.

Remote control: Control your thermostat from anywhere using the Nest app.

Know more, save more Check your Energy History to see how much energy you use and why.

Look for the Leaf: The Nest Leaf appears when you choose a temperature that saves energy.

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.)

ENERGY STAR certified. Help save energy, track your heating and cooling with monthly energy reports and get personalized tips on reducing energy use.

SAVE ENERGY AND GET REWARDED by checking with your energy provider about available energy savings rebates to save on your purchase (rebate finder link above). Plus, eligible customers can enroll in their local Utility's "DEMAND RESPONSE PROGRAM" which can reward you for allowing the utility to slightly adjust your AC or furnace temperature settings when there is high energy demand.

C-WIRE POWER ADAPTER REQUIRED: Before purchasing, check to see if this thermostat is compatible with your home and to determine if your home needs a C-wire power adapter.

SMART HOME INTEGRATION. The Wi-Fi 7-Day is compatible with voice assistant devices like Amazon Alexa, Google Assistant, Microsoft Cortana, and more.

THERMOSTAT THAT FITS YOUR LIFE. 7-day, 4 periods per day, flexible programming lets you sync your comfort with your schedule.

EASY OPERATION AND INTUITIVE. Big, backlit digital display and easy controls make for a user-friendly experience.

EASY-TO-USE-APP. Choose from the Total Connect Comfort app or the Resideo app to control your Wi-Fi thermostat anytime, anywhere.

COMPATIBLE WITH: Forced air (gas, oil or electric), hot water and steam, and heat pumps with electric backup. Does NOT work with electric baseboard heat (120-240V). C-Wire required.

Works with most heat/cool oil furnace systems. Will not work with heating only oil furnace systems unless a C-Wire is present.

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.

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.

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.