Best Smart Thermostats to Save Energy in 2025

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Reviewed by: Home Automation Experts Team
Smart Thermostats to Save Energy in 2025

This guide covers the best smart thermostats available, emphasizing energy-saving features and ease of integration into smart home systems.

In an ever-evolving world of technology, smart thermostats stand out as a vital tool for those looking to enhance comfort and reduce energy consumption. This guide evaluates the top smart thermostats available today, focusing on their ability to save energy while offering features that simplify home climate control.

Homeowners and renters looking to improve energy efficiency and enhance climate control in their living spaces should consider this guide.

Our Top Picks

Best Overall
Nest Learning Thermostat 3rd Generation

Nest Learning Thermostat

A smart thermostat that adapts to your schedule, learns your preferences, and efficiently manages your home's temperature.

Pros

  • Adaptive learning capabilities
  • Energy history tracking
  • Elegant design
  • Easy installation

Cons

  • Higher upfront cost
  • Somewhat limited compatibility with certain heating systems

Ideal for most homeowners looking to balance comfort, energy savings, and convenience. These models offer a comprehensive set of features including easy installation, intuitive user interface, and compatibility with a wide range of heating and cooling systems.

For anyone seeking intuitive control and optimal energy efficiency, this smart thermostat consistently monitors and adjusts to your routines, making it a perfect addition to any home.


Runner-Up
ecobee SmartThermostat with Voice Control

SONOFF Zigbee Radiator Thermostat TRVZB

Equipped with built-in Alexa and smart sensors, this thermostat offers robust control over your home climate, even when you are away.

Pros

  • Built-in Alexa and smart sensors
  • User-friendly interface
  • Good energy reports

Cons

  • Voice control can be inconsistent
  • Pricier than other alternatives

Perfect for users who value reliability and ease of use over having the absolute top features.

Simplicity meets functionality in this thermostat, ideal for those who appreciate straightforward operability without sacrificing advanced energy-saving features.


Best Budget
Honeywell Home T5+ Smart Thermostat

Vaxson Screen Protectors for T5 Thermostat

A budget-friendly thermostat offering essential smart features and reliable performance at an affordable price.

Pros

  • Affordable price
  • Efficient energy use
  • Customizable scheduling

Cons

  • Limited smart home integration
  • Basic design aesthetics

Great for budget-conscious homeowners who want smart thermostat technology without breaking the bank.

This budget-friendly option provides essential smart features necessary for efficient home temperature management without the extra cost, making it perfect for secondary properties or smaller homes.


Best for Smart Home Integration
Ecobee4 Smart Thermostat with Built-in Alexa

SONOFF Zigbee Smart Radiator Thermostat TRVZB

Designed for integration with extensive smart home platforms, this model supports voice control and seamless automation.

Pros

  • Compatible with major smart home platforms
  • Built-in Alexa
  • Remote sensors for extensive control

Cons

  • Complex setup process
  • Higher price bracket

Designed for users who want a device that seamlessly integrates with other smart devices.

A superior choice for tech-savvy homeowners with existing smart home ecosystems, offering full integration with major platforms and advanced automation.


Best for Multi-Zone Control
Honeywell Home T9 Smart Thermostat with Sensor

Honeywell T6 Smart WiFi Thermostat

Ideal for controlling multiple zones, this thermostat comes with sensors to optimize comfort in different areas of your home.

Pros

  • Multi-zone support
  • Versatile room sensors
  • User-friendly app

Cons

  • Sensor range limitations
  • Setup can be tricky

Ideal for homes with complex heating and cooling needs, allowing for precise control over multiple zones.

Perfect for large homes needing customized climate control in various rooms, this thermostat ensures maximum comfort and energy efficiency by allowing users to set different temperatures for individual zones.

Product Comparison

Product Our Rating Pros Cons
Nest Learning Thermostat 3rd Generation Nest Learning Thermostat View on Amazon
★★★★★ (5/5)
  • Adaptive learning capabilities
  • Energy history tracking
  • Elegant design
  • Easy installation
  • Higher upfront cost
  • Somewhat limited compatibility with certain heating systems
ecobee SmartThermostat with Voice Control SONOFF Zigbee Radiator Thermostat TRVZB View on Amazon
★★★★★ (4.5/5)
  • Built-in Alexa and smart sensors
  • User-friendly interface
  • Good energy reports
  • Voice control can be inconsistent
  • Pricier than other alternatives
Honeywell Home T5+ Smart Thermostat Vaxson Screen Protectors for T5 Thermostat View on Amazon
★★★★☆ (4/5)
  • Affordable price
  • Efficient energy use
  • Customizable scheduling
  • Limited smart home integration
  • Basic design aesthetics
Ecobee4 Smart Thermostat with Built-in Alexa SONOFF Zigbee Smart Radiator Thermostat TRVZB View on Amazon
★★★★★ (4.5/5)
  • Compatible with major smart home platforms
  • Built-in Alexa
  • Remote sensors for extensive control
  • Complex setup process
  • Higher price bracket
Honeywell Home T9 Smart Thermostat with Sensor Honeywell T6 Smart WiFi Thermostat View on Amazon
★★★★☆ (4/5)
  • Multi-zone support
  • Versatile room sensors
  • User-friendly app
  • Sensor range limitations
  • Setup can be tricky

How We Picked

Our experts thoroughly reviewed a variety of smart thermostats using a strict selection process focused on functionality, user reviews, and technological integration.

Technology and Features

Analyzed the innovative features that enhance energy efficiency and user experience.

User Feedback

Considered user reviews to gauge satisfaction and real-world performance.

Price and Value

Weighed the cost against the features offered to determine the best value for money.

Compatibility

Ensured compatibility with a wide range of HVAC systems to reach a broader audience.

Buying Guide

Key Features to Consider

Compatibility with HVAC Systems

Ensure the smart thermostat is compatible with your existing heating and cooling setup for seamless integration.

Energy Monitoring

Look for features that track energy usage patterns to help you identify potential savings.

Smart Home Integration

Opt for models that can connect with other smart home devices for enhanced control.

User Interface

Consider thermostats with intuitive and easy-to-use interfaces, making it simple for anyone to adjust settings.

Frequently Asked Questions

How does a smart thermostat save energy?

Smart thermostats save energy by learning your schedule and preferences, and automatically adjusting the temperature for efficiency.

Can I install a smart thermostat myself?

Many smart thermostats come with straightforward installation guides, but professional installation is recommended for complex systems.

Do smart thermostats work with all HVAC systems?

Most smart thermostats work with common HVAC systems, but it's important to check compatibility with your specific setup.

Are smart thermostats worth the investment?

Yes, they typically lead to energy savings over time, which can offset the initial cost and add convenience to managing home temperatures.