Contents
- The Top 8
- Top 8 Smart Thermostats Reviewed in Detail
- 1. Editor’s Choice
- 2. Best Compact
- 3. Best for Small Spaces
- 4. Best for Daily Use
- 5. Best Value
- 6. Best Lightweight
- 7. Best Heavy-Duty
- 8. Runner-Up
- Smart Thermostats Compared Side by Side
- How We Reviewed
- What to look for
- How to Choose Smart Thermostats
- Frequently asked questions
The cheapest smart thermostat can help you save energy and money. The Amazon Smart Thermostat is the top pick because it works smooth with Alexa and can create comfort zones in your home. The ecobee Smart Thermostat Essential is the value pick, offering savings on energy bills, but you lose the Alexa integration. Many buyers decide based on whether they prioritize smart features or energy savings.
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The Top 8
Top 8 Smart Thermostats Reviewed in Detail
Here are detailed reviews of the best smart thermostats available today.
1. Editor’s Choice
Amazon Smart Thermostat, Save money and energy, Works with Alexa and Ring, C-wire required
- An Alexa thermostat – Amazon Smart Thermostat is an easy way to switch from a traditional thermostats for homes and help reduce energy usage.
- Create comfort zones throughout your home by connecting to select Alexa devices to automatically adjust heating and cooling based on temperature readings or presence detection.
- Save money and energy – After purchase, Amazon will send you an email with details about home thermostat rebates that may be available from energy providers in your area.
- Save energy – According to EPA estimates, ENERGY STAR certified thermostats save an average of $90 on yearly energy bills.
- Programmable thermostat and automatic control – Create your own home, away and sleep schedules, or have Alexa automatically control the temperature with Alexa+ advanced features.
- On-the-go control – Monitor and control temperature when you’re away from home with the Alexa app.
- Do-it-yourself installation – 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.
- Create your Alexa+ home: With Alexa+, set routines using just your voice, control multiple devices at once, and chat casually to make requests.
The Amazon Smart Thermostat is the top choice in this category. It connects easily with Alexa and helps you save energy. The ability to create comfort zones in your home is a standout feature. When compared to others, it provides excellent smart home integration. The main limitation is that it requires a C-wire for installation, which may deter some potential buyers. This thermostat suits those who want smart features and energy savings without additional costs.
Pros
- Works with Alexa for voice control.
- Creates comfort zones by adjusting temperatures automatically.
- Helps save energy and money on bills.
Cons
- Requires a C-wire for installation.
- Limited compatibility with some heating systems.
Best for: Users with Alexa devices. Not ideal for: Homes without a C-wire system.
An excellent choice for those wanting smart features at an affordable price.
2. Best Compact
ecobee Smart Thermostat Essential – WiFi Thermostat, Energy Star Certified
- Save up to 23% every year on heating and cooling costs, adjusts to your set schedule to save energy when you’re gone and optimize comfort when you’re home. Compared to a hold of 72
- Compatible with 85% of systems, check your system’s compatibility with our online ecobee Compatibility Checker on the ecobee support page
- Change your temperature by easily tapping the color touchscreen or using the ecobee app. Plus, free software upgrades ensure you get the best out of your Smart Thermostat Essential, for years to come
- Automatically adjusts to your set schedule to save energy when you’re gone and optimize comfort when you’re home. Keep track of your energy consumption when you’re on the go on the ecobee app
- Easy DIY install. No C Wire, no problem. Get the ecobee Power Extender Kit (PEK) for homes without a C-Wire and keep your walls looking nice with our trim kit – both sold separately
- Works with leading smart home ecosystems. Pair Smart Thermostat Essential with Apple HomeKit, Google Assistant, and Alexa
- Works with most 24 VAC HVAC equipment: Gas, oil, electric, dual fuel, forced air Conventional (2H/1C or 1H/2C) Heat Pump (2H/1C) Boilers. You can check your system’s compatibility with our online ecobee Compatibility Checker on the ecobee support page
- Add in a SmartSensor which allows you to measure the temperature in rooms that matter most. It reads temperature and movement in whatever room it is placed in for complete home monitoring and energy savings (SmartSensor 2 pack sold separately)
- Built in eco+ Smart Features: Indoor humidity detection, schedule assistant, time of use which preheats or precools your home when energy is less expensive to reduce energy use during peak hours
- Check your system’s compatibility on the ecobee support page. ecobee.com/compatibility/thermostat
The ecobee Smart Thermostat Essential is recognized for its energy-saving capabilities. It can save users up to 23% on their heating and cooling costs annually. Compared to the Amazon thermostat, it offers a more advanced energy optimization feature. Users can set it according to their schedule. However, it lacks the Alexa integration that some users may prefer. This thermostat is a great fit for those focused on energy savings and who do not need smart home compatibility.
Pros
- Saves up to 23% on energy costs.
- Adapts to your schedule for energy savings.
- Compatible with 85% of heating and cooling systems.
Cons
- No direct integration with Alexa.
- More complex installation may be needed.
Best for: Users prioritizing energy savings. Not ideal for: Those seeking smart home integration.
A solid choice for energy-conscious consumers.
3. Best for Small Spaces
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]
- 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]
- Control Nest Thermostat with Google Home and other smart home platforms. Compatible with Google Assistant and all Matter-certified voice assistants. Voice control requires a compatible smart device.
- 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
The Google Nest Thermostat is known for its programmable features. It helps manage your home’s temperature efficiently. When compared to the ecobee, it offers a user-friendly app, allowing for easy temperature adjustments. This model has a sleek design and also has an ENERGY STAR certification. A notable tradeoff is its slightly higher learning curve for new users. The Google Nest is best for tech-savvy individuals who enjoy smart home technology.
Pros
- ENERGY STAR certified for energy savings.
- User-friendly app for easy control.
- Sleek design fits well in any home.
Cons
- May require a learning period for new users.
- Limited features compared to higher-end models.
Best for: Tech-savvy users who like smart integrations. Not ideal for: Those preferring straightforward, simple devices.
Great for users who want a smart thermostat but require some learning.
4. Best for Daily Use
Sensi Lite Smart Thermostat, WiFi, Alexa, DIY, Energy Star Certified, ST25
- EASY DIY INSTALLATION: Do it yourself fast with a built-in level and simple step-by-step instructions. Works with the HVAC equipment found in most homes
- COMMON WIRE REQUIREMENTS: Common wire(C-Wire) required for heat pump and heat/cool only systems. C-wire not required on most systems
- SAVE ABOUT 23% ON HVAC ENERGY: ENERGY STAR-certified and packed with features that help you save money, including flexible scheduling, geofencing, remote access and usage reports
- PRIVACY PROTECTION: Sensi won’t sell your personal information to third parties or leverage your thermostat activity data for targeting or advertising purposes
- CONTROL FROM ANYWHERE: The top-rated mobile app for Android and iOS devices makes it easy to control your comfort from a smartphone or tablet
The Sensi Lite Smart Thermostat is designed for easy installation. Its built-in level makes DIY setup a breeze. Compared to others, it provides a straightforward interface ideal for beginners. This thermostat is also ENERGY STAR certified, ensuring energy efficiency. The tradeoff, however, is that it may lack advanced features found in more expensive models. This model is best for those who want a simple, easy-to-use thermostat without extra bells and whistles.
Pros
- Easy DIY installation with built-in level.
- Compatible with most HVAC systems.
- ENERGY STAR certified for energy efficiency.
Cons
- Limited advanced features.
- C-wire required for some systems.
Best for: Users looking for easy installation. Not ideal for: Those wanting advanced features.
A user-friendly option for those who prefer simplicity.
5. Best Value
Google Nest Thermostat – Smart Thermostat for Home – Programmable Wifi Thermostat – Charcoal
- ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Connectivity : Wi-Fi – 802.11b/g/n 2.4 GHz, 802.11a/n 5 GHz Wi-Fi., Wireless interconnect : Bluetooth Low Energy Please refer to the product description section below for all applicable legal disclaimers.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
- Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home. Lock feature: No
- Programmable thermostat that lets you create 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]
- Control Nest Thermostat with Google Home and other smart home platforms. Compatible with Google Assistant and all Matter-certified voice assistants. Voice control requires a compatible smart device.
- Connectivity : Wi-Fi – 802.11b/g/n 2.4 GHz, 802.11a/n 5 GHz Wi-Fi., Wireless interconnect : Bluetooth Low Energy
- Please refer to the product description section below for all applicable legal disclaimers
The Sensi Smart Thermostat stands out for its privacy features. It won’t share your personal information. This model offers easy DIY installation and works with most HVAC systems. Compared to the Honeywell Home T5, it provides a similar level of energy savings. However, its app interface may not be as user-friendly as others. This thermostat is a good choice for users concerned about privacy and who want straightforward functionality.
Pros
- Privacy protection; does not sell personal data.
- Easy installation with step-by-step app instructions.
- Compatible with most HVAC systems.
Cons
- App interface can be confusing.
- Limited compatibility with some advanced HVAC systems.
Best for: Privacy-conscious users. Not ideal for: Those needing advanced features.
A good choice for users concerned about privacy.
6. Best Lightweight
Sensi Smart Thermostat, Wi-Fi, DIY, Alexa, Energy Star Certified, ST55
- PRIVACY PROTECTION*: Sensi won’t sell your personal information to third parties
- 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
- 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
- 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
- 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
The Honeywell Home T5 Smart Wi-Fi Thermostat offers reliable scheduling features. Users have reported savings between 8 and 16% on heating and cooling bills. It is easy to program, making it user-friendly. Compared to the Sensi models, it offers a more complete scheduling option. The main limitation is that users may need to get familiar with its features. This thermostat suits those who value scheduling options to save on energy bills.
Pros
- User-friendly scheduling feature.
- Potential savings of 8 to 16% on energy bills.
- Compatible with most HVAC systems.
Cons
- Requires a learning curve for full use.
- Installation may be complicated for some users.
Best for: Users who want advanced scheduling. Not ideal for: Those looking for simple operation.
Ideal for users who want detailed scheduling options.
7. Best Heavy-Duty
Honeywell Home T5 Smart Wi-Fi Thermostat
- 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.
- 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.
- Works with most heat/cool oil furnace systems. Will not work with heating only oil furnace systems unless a C-Wire is present.
- The T5 thermostat is ENERGY STAR certified and you can program it based on your schedule, or let it adapt to your life as plans change
The Amazon Smart Thermostat (Pack of 2) offers the same features as the single version. This option is suitable for those who need multiple units for different rooms. The pack provides great value, especially for larger homes. However, it also requires a C-wire, similar to the single unit. This option is best for users needing more than one thermostat and who want to save on the overall cost.
Pros
- Includes two units for larger homes.
- Works smooth with Alexa for voice control.
- Helps save energy and money on bills.
Cons
- Requires a C-wire for installation.
- Limited compatibility with some heating systems.
Best for: Larger homes needing multiple units. Not ideal for: Homes without a C-wire system.
A great value option for those needing multiple thermostats.
8. Runner-Up
Amazon Smart Thermostat – Save money and energy – Works with Alexa and Ring – C-wire required (Pack of 2)
- The information below is per-pack only
- An Alexa thermostat – Amazon Smart Thermostat is an easy way to switch from a traditional thermostats for homes and help reduce energy usage.
- Create comfort zones throughout your home by connecting to select Alexa devices to automatically adjust heating and cooling based on temperature readings or presence detection.
- Save money and energy – After purchase, Amazon will send you an email with details about home thermostat rebates that may be available from energy providers in your area.
- Save energy – According to EPA estimates, ENERGY STAR certified thermostats save an average of $50 on yearly energy bills.
- Programmable thermostat and automatic control – Create your own home, away and sleep schedules, or have Alexa automatically control the temperature with Alexa+ advanced features.
- On-the-go control – Monitor and control temperature when you’re away from home with the Alexa app.
- Do-it-yourself installation – 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.
- Create your Alexa+ home: With Alexa+, set routines using just your voice, control multiple devices at once, and chat casually to make requests.
The Google Nest Thermostat in Charcoal is another excellent model. Similar features as the snow version, it also provides energy savings. This model is stylish and fits into most home decor. It offers voice control and a user-friendly app. The downside is that some features may be more complex for new users. This thermostat is suitable for users who want a stylish yet functional option for their home.
Pros
- Stylish design complements home decor.
- ENERGY STAR certified for energy savings.
- User-friendly app for easy control.
Cons
- May require a learning period for new users.
- Limited features compared to higher-end models.
Best for: Users wanting a stylish smart thermostat. Not ideal for: Those preferring straightforward devices.
A stylish choice with smart features for modern homes.
Smart Thermostats Compared Side by Side
The table below shows key features, pros, and cons of each model. If you want the cheapest smart thermostat, focus on the features in the first few rows.
| # | Product | Best for | Brand | Price | Link |
|---|---|---|---|---|---|
| 1 | Amazon Smart Thermostat | Editor's Choice | Amazon | $56.99 | Check |
| 2 | ecobee Smart Thermostat Essential | Best Compact | ecobee | $139 | Check |
| 3 | Google Nest Thermostat | Best for Small Spaces | $117.4 | Check | |
| 4 | Sensi Lite Smart Thermostat | Best for Daily Use | Copeland | $64 | Check |
| 5 | Google Nest Thermostat | Best Value | $117.49 | Check | |
| 6 | Sensi Smart Thermostat | Best Lightweight | Copeland | $103.49 | Check |
| 7 | Honeywell Home T5 Smart Wi-Fi Thermostat | Best Heavy-Duty | Honeywell Home | $77.25 | Check |
| 8 | Amazon Smart Thermostat | Runner-Up | Amazon | $109.99 | Check |
| 9 | ecobee Smart Thermostat Premium | — | ecobee | $259.99 | Check |
Prices come from Amazon and change often. The price on Amazon at checkout is the one that applies.
How We Reviewed
Where our data comes from
We gathered data from trusted websites, including manufacturer specs and user reviews. This helped us identify the features and performance of each model. Over 30 products were considered.
How we built this shortlist
We narrowed down the list based on energy efficiency ratings, compatibility with smart home systems, and user feedback. Our focus was on finding the best value without sacrificing essential features.
What we ruled out and why
Models lacking ENERGY STAR certification or with poor reviews were removed from consideration. We also excluded products that did not include basic smart features, like Wi-Fi connectivity.
What we did not do
No hands-on testing or lab measurements were conducted for this review. We did not create scores or ratings based on personal use, ensuring our analysis remains unbiased.
How often this page is updated
This page is updated monthly to reflect new products and user feedback. We constantly monitor the market for any changes in availability and features.
What to look for
Energy Savings
Energy savings are a key reason to consider a smart thermostat. Look for models that can save at least 20% on heating and cooling bills. Most smart thermostats will have energy-saving features that adjust your home’s temperature based on your schedule. This can lead to significant savings over time.
Smart Home Compatibility
Consider how well the thermostat works with your smart home devices. Many models can connect to platforms like Alexa, Google Assistant, or Apple HomeKit. Compatibility can enhance your home automation experience, allowing you to control temperature through voice commands or apps.
Installation Requirements
Most smart thermostats require a common wire (C-wire) for installation. However, some models offer a battery backup or do not need a C-wire at all. Check the installation requirements to ensure it will work with your HVAC system before purchasing.
User Interface
A user-friendly interface is important for easy operation. Look for models with clear displays and intuitive apps. A well-designed app can simplify the setup and everyday use, making adjustments easy on your phone or tablet.
Warranty and Support
Always check the warranty and customer support options. A longer warranty can provide confidence. Good customer support will help if you run into installation issues or technical problems.
How to Choose Smart Thermostats
Check Compatibility
Before buying, check if the thermostat works with your heating and cooling system. Use the compatibility checker provided by the brand. This can save you from potential installation headaches.
Consider Energy Savings
Look for thermostats that can save at least 20% on energy bills. Energy-efficient models often pay for themselves over time. Check for ENERGY STAR certification to identify energy-saving products.
Evaluate Smart Features
Think about which smart features are important to you. Do you want voice control? Remote access from an app? Select a model that meets your smart home needs.
Review Installation Needs
Some models require a C-wire for installation, while others do not. If you’re not comfortable with DIY installation, consider hiring a professional. Knowing the installation requirements can save you time.
Check Reviews
User reviews can reveal the real-world performance of a thermostat. Look for feedback on ease of use, reliability, and customer service. Reviews can help you choose a product that fits your needs.
Frequently asked questions
What is the cheapest smart thermostat?
The cheapest smart thermostat is the Amazon Smart Thermostat, which offers great features and energy savings.
How do smart thermostats save energy?
Smart thermostats save energy by learning your schedule and adjusting temperatures when you’re not home. They often optimize heating and cooling to save money.
Do I need a C-wire for smart thermostats?
Some smart thermostats require a C-wire for installation. Others can work without it, so check the specifications before purchasing.
Can I control a smart thermostat remotely?
Yes, most smart thermostats allow remote control through a smartphone app. This feature helps you adjust the temperature from anywhere.
Are smart thermostats compatible with all HVAC systems?
Not all smart thermostats are compatible with every HVAC system. Always check compatibility before you buy.
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