8 Best Smart Thermostats: Expert-Tested Premium Models for 2025

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• Save up to 23% annually on heating and cooling costs (compared to a hold of 72°F)
• Control from anywhere using your Android or iOS device
• Add SmartSensor to manage hot or cold spots and deliver enhanced comfort to the rooms that matter most
• Automatically pauses your heating or cooling when a door or window is left open (requires ecobee SmartSensor for doors and windows and a Smart Security subscription)
• ecobee was named an ENERGY STAR Partner of the Year award winner
• Integrates seamlessly with your preferred smart home system. Connectivity - Wi-Fi, 802.11 b/g/n @ 2.4 GHz
• Compatible with most 24VAC HVAC systems: furnaces, ACs (2H/2C), heat pumps (2H/2C + 2 stage AUX), boilers, PTACs, and fan coil units (3 fan speeds). Includes Power Extender Kit for C-Wire-less homes, ensuring easy installation. DHCP (dynamic) or static IP addressing 168 bit SSL encryption

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• 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.
• Automatic Control - Alexa can automatically switch between your preferred home, away, and sleep temperatures.
• On-the-go control - Let Alexa set the temperature, or set it yourself from anywhere with the Alexa app.
• You can do it - 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.

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• 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