10 Best Smart Thermostats 2025 in the United States

The ecobee New Smart Thermostat Enhanced is a robust option for those looking to save on heating and cooling costs, boasting an impressive potential saving of up to 26% per year. Its Energy Star certification underpins its efficiency and environmental benefits. This thermostat has notable learning capabilities, automatically adjusting the temperature based on occupancy and optimizing comfort by accounting for humidity and preheating or precooling your home before you arrive.

The integration with major smart home systems, including Siri, Alexa, and Google Assistant, ensures seamless remote access and control through the ecobee app on various devices like smartphones and smartwatches, enhancing convenience. The installation process is user-friendly, typically taking around 45 minutes, and the provided Power Extender Kit makes it adaptable for homes without a C-wire. The hardwired design eliminates concerns about battery replacements, although it does include a lithium-ion battery.

A potential downside is that it doesn’t come with the SmartSensor, which is sold separately but can significantly enhance temperature monitoring in important rooms. The thermostat's compatibility with a wide range of HVAC systems adds to its versatility. Despite the initial cost and the need for additional purchases like the SmartSensor being potential drawbacks, its durability, backed by a 3-year warranty and quality materials, makes it a long-lasting investment for home climate control.

The Google Nest Learning Thermostat (4th Gen) is an impressive smart thermostat designed to enhance energy efficiency in your home. Its compatibility with most 24V heating and cooling systems makes it a versatile choice for many households. One of its standout features is its learning capability, allowing it to adapt to your preferences over time. This means it can automatically adjust temperatures based on your habits, promoting energy savings—averaging about 12% on heating and 15% on cooling bills.

Remote access through the Google Home app is another significant advantage. This feature allows you to control your home's temperature from anywhere, making it convenient for busy lifestyles. The inclusion of the Nest Temperature Sensor enhances its functionality, allowing you to manage temperature variations across different rooms effectively.

The design is sleek and modern, with a large display that's easy to read. The Adaptive Eco feature is a nice touch as it offers further energy-saving options, though it requires active monitoring and tweaking through the app. The Google Nest Learning Thermostat (4th Gen) is well-suited for those looking to reduce energy costs while enjoying the convenience of modern technology. It's particularly beneficial for homeowners who appreciate smart home integration and are willing to take some time to set it up properly.

The ecobee Smart Thermostat Premium is a versatile and user-friendly option for smart control of home heating and cooling. It supports Wi-Fi connectivity and integrates well with popular voice assistants like Siri and Alexa, enabling easy voice commands and remote control via your smartphone. A key feature is the included SmartSensor for doors and windows, which monitors entry and motion while adjusting the temperature in key rooms to reduce uncomfortable hot or cold spots. This can improve comfort and potentially save energy, with ecobee claiming up to 26% annual savings on heating and cooling costs.

Additional features include a built-in air quality monitor that alerts you to poor indoor air quality and reminds you when it’s time to change your furnace’s filter, helping maintain a healthy home environment. The thermostat is ENERGY STAR certified, ensuring it meets efficiency guidelines. Installation typically requires hardwiring, so basic electrical work or professional assistance might be necessary. The LCD display with backlight and built-in speaker enhance usability, and smart scheduling features allow customization of temperature settings to fit daily routines.

Some advanced features, such as customizable security alerts for motion or entry, require a subscription to ecobee Smart Security, which is an additional cost. Also, the hardwired power source requirement may limit installation options in some homes. This thermostat is well suited for homeowners seeking a smart, energy-saving device with advanced comfort controls, air quality monitoring, and compatibility with voice assistants or integrated home security.