Do Smart Thermostats Save Money on Energy Bills?

23 minutes read

Smart thermostats can potentially save money on energy bills by optimizing heating and cooling schedules based on your habits and preferences. They often come equipped with sensors and connectivity features that allow them to learn your daily routines and adjust the temperature accordingly, ensuring that energy is not wasted when no one is home or during times when less heating or cooling is needed. Many smart thermostats also provide insights and suggestions on how to conserve energy, helping users make informed decisions to improve efficiency. Additionally, remote access via smartphone apps allows users to control their home's temperature from anywhere, preventing unnecessary energy consumption. While the initial investment might be higher than that of a traditional thermostat, the potential savings in energy costs over time can offset the purchase price, especially with consistent use and optimization of the thermostat's features.

Best Smart Thermostats for Houses of February 2025

1
ecobee Smart Thermostat Enhanced - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant - Energy Star Certified - Smart Home

Rating is 5 out of 5

ecobee Smart Thermostat Enhanced - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant - Energy Star Certified - Smart Home

  • 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.
  • 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. Adjusts the temperature to account for humidity so your home always feels like the temperature you’ve set.
  • 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.
2
ecobee Smart Thermostat Premium with Smart Sensor and Air Quality Monitor - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant

Rating is 4.9 out of 5

ecobee Smart Thermostat Premium with Smart Sensor and Air Quality Monitor - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant

  • Save up to 26% per year on heating and cooling costs. ENERGY STAR certified. Included SmartSensor (50 dollar value) adjusts the temperature in the rooms that matter most to reduce hot or cold spots to keep you comfortable. Compared to a hold of 72°F.
  • Built-in air quality monitor alerts you to poor air quality, provides tips on how to improve it, and reminds you when it’s time to change your furnace’s air filter.
  • Premium materials and advanced engineering mean a large, vibrant display with a cinematic interface, a timeless design, and next level occupancy sensing.
  • ecobee Smart Thermostat Premium is a complete home monitoring hub that includes built-in smoke alarm detection and alerts to possible break-ins when your system is armed. Get notifications during sudden temperature drops that could cause damage. ecobee Smart Security plan required
  • Comes with a smart speaker and your choice of Siri or Alexa Built-in. Control your home using the power of your voice and listen to your favorite Spotify playlists and podcast through your thermostat’s speaker. Apple home hub required to enable Siri on Smart Thermostat Premium
3
Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Snow

Rating is 4.8 out of 5

Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Snow

  • 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.Connectivity Protocol : ‎Wi-Fi.Connectivity Protocol : ‎Wi-Fi
  • 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]
4
Amazon Smart Thermostat – Save money and energy - Works with Alexa and Ring - C-wire required

Rating is 4.7 out of 5

Amazon Smart Thermostat – Save money and energy - Works with Alexa and Ring - C-wire required

  • Smart upgrade - Amazon Smart Thermostat is an easy way to switch from a traditional thermostat and help reduce energy usage.
  • Supports temperature sensors - use compatible Echo devices (Echo Dot (4th and 5th gen), Echo Dot with clock (5th gen)), and the Amazon Smart Air Quality Monitor as temperature sensors to address hot or cold spots in your home.
  • 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.
5
Google Nest Thermostat E - Programmable Smart Thermostat for Home - 3rd Generation Nest Thermostat - Works with Alexa,White

Rating is 4.6 out of 5

Google Nest Thermostat E - Programmable Smart Thermostat for Home - 3rd Generation Nest Thermostat - Works with Alexa,White

  • Programmable smart thermostat that learns the temperatures you like and programs itself to help you save energy and stay comfortable; start with a simple schedule and easily adjust it whenever you like in the Nest app
  • Home/Away Assist automatically adjusts itself to an Eco Temperature after you leave, so you don’t heat or cool an empty home. Connectivity requirements-Wi-Fi internet connection, Phone or tablet running iOS or Android, Nest app
  • Remote control lets family members change the temperature on this smart thermostat from anywhere using a phone, laptop, or tablet[1]
  • The Nest Thermostat E has 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]
  • Works with the Nest Temperature Sensor (sold separately) to help make sure a certain room is the exact temperature you want it to be
6
Google Nest Learning Thermostat - 3rd Gen (2015) - Programmable Smart Thermostat for Home - Works with Alexa - White

Rating is 4.5 out of 5

Google Nest Learning Thermostat - 3rd Gen (2015) - Programmable Smart Thermostat for Home - Works with Alexa - White

  • Programmable smart thermostat that learns your schedule and the temperatures you like and programs itself to help you save energy and stay comfortable
  • Home/Away Assist automatically adjusts itself to an Eco Temperature after you leave, so you don’t heat or cool an empty home; remote control lets you change the temperature from anywhere on your phone, laptop, or tablet[1]
  • With Energy History, just check your phone to see how much energy you used and why, or use Quick View on the display to reach Energy History, settings, or your schedule; the Nest Leaf appears when you choose a temperature that saves energy
  • 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]
  • The Nest Learning Thermostat works with the Nest Temperature Sensor (sold separately) to help make sure a certain room is the exact temperature you want it to be
  • Beautifully designed, with polished metal finishes and bright, high resolution display; Farsight shows you the temperature, weather, or time on your thermostat when you walk in the room
7
Honeywell Home RTH9585WF1004 Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready, Gray

Rating is 4.4 out of 5

Honeywell Home RTH9585WF1004 Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready, Gray

  • Compatible with: Alexa, SmartThings, Google Home, IFTTT.Central Air Conditioning : Yes. Heat Pump with Auxiliary heat. Yes..WiFi Specifications : 802.11b, 802.11g, 802.11n, 2.4GHz range.
  • Check to see If your new thermostat qualifies for a utility rebate; Auto-updates for daylight savings; adjusts for 12/24-hour and multi-language needs
  • Customizable touchscreen in full Color with easy to read numbers and text, view your local weather including indoor and outdoor relative humidity levels
8
Honeywell Home RTH8800WF2022, T5 WiFi Smart Thermostat, 7 Day-Programmable Touchscreen, Alexa Ready, Geofencing Technology, Energy Star, C-Wire Required

Rating is 4.3 out of 5

Honeywell Home RTH8800WF2022, T5 WiFi Smart Thermostat, 7 Day-Programmable Touchscreen, Alexa Ready, Geofencing Technology, Energy Star, C-Wire Required

  • High use of the scheduling feature of the T5 thermostat saved customers between 8 and 16% on heating and cooling bills. Dollar savings range based on nationwide average annual single-family detached home's heat and cooling bills; actual savings varies based on consumption.
  • Save Energy and Get Rewarded. Check with your energy provider about available energy savings rebates to save on your purchase. 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.
  • 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.
  • Auto Home and Away Mode. Enjoy ideal temperatures at home, then save when away.
  • ENERGY STAR certified. Help save energy, track your heating and cooling with monthly energy reports and get personalized tips on reducing energy use.


What is the role of sensors in smart thermostats?

Sensors play a critical role in the functionality and efficiency of smart thermostats. Here are some key roles they serve:

  1. Temperature Detection: Sensors in smart thermostats accurately measure the ambient temperature inside a room or zone. This information is essential for adjusting heating or cooling systems to maintain the desired comfort level.
  2. Occupancy Sensing: Many smart thermostats are equipped with motion or occupancy sensors that detect whether a space is occupied. This allows the system to adjust heating or cooling based on the presence of occupants, leading to energy savings by reducing HVAC use in unoccupied spaces.
  3. Humidity Monitoring: Some smart thermostats include humidity sensors, which help maintain a comfortable indoor environment by adjusting the temperature in relation to the moisture level. This can prevent issues such as mold growth or discomfort due to very dry or humid air.
  4. Learning Behavioral Patterns: Sensors gather data about the home's usage patterns and occupancy, which helps in learning the habits and preferences of the inhabitants. Over time, the thermostat can optimize settings automatically based on these patterns to enhance comfort and efficiency.
  5. Outdoor Weather Tracking: Although not directly a sensor feature within the thermostat, some smart thermostats can connect to the internet or other sensors to obtain local weather data. This allows them to preemptively adjust settings based on upcoming weather conditions, further optimizing energy use.
  6. Air Quality Monitoring: Advanced models may feature sensors for detecting pollutants or allergens, contributing to improved indoor air quality management alongside heating and cooling functions.


Overall, sensors enable smart thermostats to provide a more personalized, efficient, and responsive heating and cooling experience while often contributing to energy savings.


What is Energy Star certification for smart thermostats?

Energy Star certification for smart thermostats is a designation awarded by the U.S. Environmental Protection Agency (EPA) to products that meet specific energy efficiency criteria. This certification is intended to help consumers identify smart thermostats that provide enhanced energy savings, improve home comfort, and reduce greenhouse gas emissions.


To earn the Energy Star certification, a smart thermostat must demonstrate certain capabilities and meet rigorous performance standards. These typically include:

  1. Energy Savings: The product must provide significant energy savings in heating and cooling systems. This often involves using advanced algorithms to optimize temperature settings based on occupancy, weather forecasts, and user preferences.
  2. Remote Access and Control: Certified smart thermostats generally allow users to remotely control and monitor their heating and cooling systems via smartphones, tablets, or computers. This feature enhances convenience and enables users to make adjustments that could lead to greater energy efficiency.
  3. User-Friendly Features: These devices usually have intuitive controls and interfaces, making it easier for users to make adjustments and maximize energy savings.
  4. Learning Capabilities: Many certified smart thermostats can learn household patterns and preferences over time to automatically adjust settings for improved efficiency without sacrificing comfort.
  5. Data and Feedback: They often provide data on energy usage and feedback on how consumers can improve efficiency, helping users make more informed decisions about their energy consumption.
  6. Connectivity: They may integrate with other smart home devices and systems, enabling more comprehensive control over home energy use.


For consumers, choosing an Energy Star certified smart thermostat means selecting a product that meets established standards for energy efficiency, environmentally friendly design, and user satisfaction. This can result in reduced energy bills and environmental impact while maintaining home comfort.


What is the impact of smart thermostats on HVAC systems?

Smart thermostats have a significant impact on HVAC (Heating, Ventilation, and Air Conditioning) systems, offering several benefits and influencing them in various ways:

  1. Energy Efficiency: Smart thermostats can optimize the operation of HVAC systems, often leading to reduced energy consumption. They learn users' habits and adjust temperature settings accordingly, ensuring the system runs only when necessary. Some models also use geofencing technology to adjust settings based on whether the home is occupied.
  2. Cost Savings: By improving energy efficiency, smart thermostats can significantly lower heating and cooling costs. They help prevent wasteful usage of HVAC systems through better scheduling and real-time adjustments.
  3. Convenience and Control: Users can control smart thermostats remotely using smartphones, tablets, or computers. This flexibility allows homeowners to adjust settings from anywhere, ensuring comfort and efficiency even when plans change unexpectedly.
  4. Enhanced System Performance: Smart thermostats can extend the lifespan of HVAC systems by reducing wear and tear. By optimizing usage, these devices minimize the frequency of short cycling, which can lead to premature system breakdowns and maintenance issues.
  5. Environmental Impact: With reduced energy consumption, smart thermostats also contribute to lower carbon footprints for homes and buildings. This is beneficial for environmental conservation and aligns with global efforts to reduce emissions.
  6. Data Insights and Usage Patterns: Many smart thermostats provide detailed reports on energy usage. This data helps homeowners understand their heating and cooling patterns, allowing for informed decisions on how to further improve system efficiency and reduce costs.
  7. Integration with Smart Home Ecosystems: Smart thermostats often integrate seamlessly with other smart home devices, contributing to a more cohesive and automated smart home experience. This integration can include voice control through digital assistants and interaction with smart lights and sensors for optimal environmental control.
  8. Improved Comfort: By learning and predicting the occupants' preferences, smart thermostats can maintain a more consistent and comfortable indoor climate. They adjust proactively based on time of day, weather forecasts, and individual room preferences.
  9. Proactive Maintenance Notifications: Some smart thermostats can provide alerts when there are issues detected with the HVAC system, such as clogged filters or system malfunctions. This feature helps in maintaining the system proactively, preventing larger and often more costly problems.


Overall, the adoption of smart thermostats can lead to a more efficient, cost-effective, and environmentally friendly operation of HVAC systems while enhancing user convenience and comfort.


What are common features of smart thermostats?

Smart thermostats offer a range of innovative features that enhance convenience, efficiency, and control over home heating and cooling systems. Common features include:

  1. Remote Access: Control your thermostat from anywhere via smartphone apps, tablets, or computers.
  2. Learning Capabilities: Some smart thermostats learn your schedule and temperature preferences over time and adjust settings automatically to maximize efficiency.
  3. Energy Reports: Provide insights into your energy usage patterns and suggest ways to save energy and reduce costs.
  4. Geofencing: Uses your smartphone’s location to make automatic adjustments based on whether you’re at home or away.
  5. Voice Control: Compatibility with virtual assistants like Amazon Alexa, Google Assistant, or Apple HomeKit, allowing you to control the thermostat using voice commands.
  6. Integration with Smart Home Systems: Can sync with other smart home devices, such as lights, security systems, and smart speakers, for a more comprehensive, interconnected home environment.
  7. Scheduling: Allow you to set heating and cooling schedules that fit your daily routine, optimizing comfort and energy efficiency.
  8. Multiple Zone Control: Manage different temperatures in different areas or rooms of a house.
  9. Humidity Control: Monitor and adjust home humidity levels to enhance comfort and protect against moisture-related issues.
  10. Weather Response: Adjust settings based on local weather conditions, optimizing heating or cooling needs as outside temperatures change.
  11. Alerts and Notifications: Send alerts for temperature changes, energy usage spikes, or maintenance reminders.
  12. User-Friendly Interface: Provide touchscreens or intuitive apps that make it easy to view and change settings.


These features collectively make smart thermostats a valuable tool for improving comfort, reducing energy consumption, and providing greater control over your home environment.


How to control a smart thermostat remotely?

Controlling a smart thermostat remotely is typically straightforward and involves a few key steps. Here’s a general guide to help you get started:

  1. Install the Smart Thermostat: Ensure the smart thermostat is properly installed and wired according to the manufacturer’s instructions. Consulting a professional electrician or HVAC technician may be advisable for this step if you're unsure.
  2. Connect to Wi-Fi: Follow the setup process included with your thermostat to connect it to your home’s Wi-Fi network. This step is crucial for enabling remote access.
  3. Download the App: Download the manufacturer’s app on your smartphone or tablet. Popular smart thermostat brands like Nest, ecobee, and Honeywell have dedicated apps available on both iOS and Android platforms.
  4. Create an Account: Open the app and create an account if you haven’t already. You may need to verify your email address as part of this process.
  5. Pair the Thermostat with the App: Follow the in-app instructions to pair your thermostat with the app. This might involve entering a code displayed on the thermostat’s screen or scanning a QR code.
  6. Set Up Remote Access: Ensure that remote access is enabled in both the app and your thermostat’s settings. Often, this is configured during the initial setup.
  7. Explore App Features: Familiarize yourself with the app’s features, which may include scheduling, temperature adjustments, energy usage tracking, and more.
  8. Test Remote Control: From a remote location (away from your home Wi-Fi), test the app to make sure you can control the thermostat. Adjust the temperature or settings to ensure everything is working correctly.
  9. Integration with Smart Home Systems: If desired, integrate your thermostat with other smart home devices or systems, such as Amazon Alexa, Google Assistant, or Apple HomeKit, to enable voice control and automated routines.
  10. Security Measures:
  • Regularly update the app and the thermostat’s firmware to protect against security vulnerabilities. Use a strong, unique password for your account, and enable two-factor authentication if available.


By following these steps, you should be able to successfully control your smart thermostat remotely, optimizing your home’s energy efficiency and comfort even when you’re away.


How do smart thermostats save on energy bills?

Smart thermostats save on energy bills in several ways:

  1. Learning Capabilities: Many smart thermostats have learning algorithms that adapt to your schedule and preferences over time. They automatically adjust the temperature when you're asleep or away from home, reducing energy use during these times.
  2. Remote Access: With remote access via smartphone apps, users can adjust settings from anywhere. This means you can turn down the heating or cooling if you forget before leaving the house or if plans change and you won't be home as expected.
  3. Energy Reports: Smart thermostats often provide detailed energy usage reports and tips on how to improve efficiency. This helps users become more aware of their consumption patterns and adjust their usage to save energy.
  4. Temperature Sensors and Zoning: Some models support additional sensors placed in different rooms, enabling more precise temperature control throughout the home. This minimizes energy waste by heating or cooling only the rooms that need it.
  5. Smart Scheduling: Users can set up detailed schedules based on daily routines, ensuring the system operates efficiently by not heating or cooling the home unnecessarily.
  6. Integration with Smart Home Systems: Smart thermostats can integrate with other smart home devices, like motion sensors and occupancy detectors, to further optimize energy use based on real-time occupancy data.
  7. Weather Awareness: Many smart thermostats access local weather data to make preemptive adjustments that enhance comfort and efficiency, like reducing cooling before a rainstorm or increasing heating before a cold front.
  8. Demand Response Programs: Some utility companies offer programs that work with smart thermostats to reduce load during peak times, sometimes offering incentives or lower rates in exchange for minor adjustments in home temperature settings during these periods.


By utilizing these features, smart thermostats help homeowners manage their HVAC systems more efficiently, thus cutting down on unnecessary energy consumption and lowering utility bills.

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