10 Best Smart Thermostats 2026 in the United States

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.

The Honeywell Home RTH9600WF Smart Color Thermostat offers a blend of modern functionality and user-friendly features. Its ENERGY STAR certification is a significant advantage for energy savings, allowing users to track usage and receive personalized tips. Compatibility-wise, it supports a variety of heating and cooling systems but is not suitable for line volt heating or heating-only oil furnace systems, which can be a limitation for some households. The requirement for a C-wire can also complicate installation for users whose homes lack this wiring.

Remote access is robust, with control possible via mobile apps and integration with smart home systems like Amazon Alexa, Google Assistant, and Microsoft Cortana. This flexibility ensures that users can manage their home's climate from virtually anywhere. The customizable color touchscreen and on-screen display of indoor/outdoor temperatures, humidity, and weather forecasts enhance user experience by keeping critical information easily accessible.

However, the thermostat lacks advanced learning capabilities found in some competitors, meaning it won't automatically adjust to your habits over time. The energy reports and potential for participating in demand response programs are excellent for those looking to maximize energy savings and potentially earn rewards. Geofencing isn't explicitly mentioned, which might be a drawback for users seeking this feature for more automated adjustments based on their location. Installation ease is moderate; while many features are straightforward, the need for a C-wire can necessitate professional installation for those not comfortable with electrical work. The Honeywell Home RTH9600WF is well-suited for tech-savvy users or those with compatible home wiring who prioritize remote control and energy efficiency but might not meet the needs of users looking for more straightforward installation or advanced automation features.

The 2025 ecobee Smart Thermostat Essential offers a lot of features that make it a strong contender in the smart thermostat market. One of its biggest strengths is its compatibility with 85% of HVAC systems, which is quite impressive. This means it can likely work with your existing setup. The thermostat also supports major smart home ecosystems like Siri, Alexa, and Google Assistant, making it easy to integrate into a smart home.

Another major advantage is its energy-saving capabilities, which can help you save up to 23% on heating and cooling costs annually. This is facilitated by its auto-scheduling and auto-away mode features, which adjust the temperature based on your schedule and presence, thus optimizing energy usage. The thermostat also boasts remote access through the ecobee app, enabling you to control the temperature from anywhere. Additionally, the device comes with energy reports to help you monitor consumption and make informed decisions to save more energy.

Installation is relatively straightforward, with an easy DIY setup, although homes without a C-Wire may require the separately sold Power Extender Kit (PEK). On the downside, the need to purchase additional accessories like the SmartSensor for enhanced room-specific monitoring and the PEK for certain installations could be seen as a drawback. Some users may also find the initial cost a bit steep, although the energy savings over time can offset this. It's a well-rounded product that offers significant benefits, especially for those looking to integrate it within a smart home ecosystem and save on energy bills.