Smart thermostats / Comparison

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Wi-Fi connected 24 V low-voltage thermostats sold new in the US. Line-voltage thermostats, pro-only equipment interface modules, utility-program packages and measured energy savings are outside this catalogue.

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Documented specifications and exact purchase packages
Compare the details	Smart Thermostat Premium with SmartSensor (ecobee.com, US)
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US purchase package	Smart Thermostat Premium, single thermostat with the included SmartSensor, Power Extender Kit and trim plate, sold on ecobee.com in the US; not the Total Security and Savings Bundle. Product & sources Box list: thermostat, mounting plate, SmartSensor with detachable stand and adhesive wall mount, Power Extender Kit, trim plate, quick-start guide, wire labels, screws and drywall anchors. The specs section marks the Power Extender Kit as optional for installation; it is still listed in the box. Price, availability and checkout were not verified. Sources · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.ecobee: ecobee smart thermostat comparison tableChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Where to buy	Select: Smart Thermostat Premium, single thermostat with the included SmartSensor, Power Extender Kit and trim plate, sold on ecobee.com in the US; not the Total Security and Savings Bundle. View at ecobee — Smart Thermostat Premium with SmartSensor (ecobee.com, US); opens in a new tab The link may open several packages. Check current price and availability with the seller. Opens in a new tab.
Documented HVAC support The manufacturer's published supported-system and stage statement, kept close to its wording. This is a published compatibility list, not an installation guarantee. Use the manufacturer's compatibility checker and your actual wiring before buying.	Works with most 24VAC HVAC equipment, including conventional furnaces and air conditioners (2H/2C), heat pumps (2H/2C + 2 stage AUX heat), boilers, and PTACs or fan coil units with up to 3 fan speeds. Source · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Heat pump stages Published heat pump compressor and auxiliary or emergency heat stage support. Heat pump staging differs from conventional staging. Dual-fuel and balance-point behavior must be confirmed separately for your equipment.	Heat pump 2H/2C plus 2 stages of AUX heat; dual-fuel heat pumps are listed. Source · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Accessory terminal support Documented humidifier, dehumidifier or ventilator accessory control and any terminal limits. One shared accessory terminal is not the same as independent control of several accessories. Some accessories need an isolation relay.	One 1-wire accessory or one 2-wire accessory: humidifiers, dehumidifiers and ventilators (HRV/ERV). Source · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
C-wire requirement The manufacturer's statement about needing a common (C) wire and how the thermostat is powered without one. A design that works without a C wire in most homes can still require one for particular systems. Treat percentages as manufacturer statements.	Wired 24VAC through terminals C and Rc. The Power Extender Kit is described as allowing installation in most homes without a C wire. Source · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Power adapter or extender in this package Whether the selected US package ships with a C-wire adapter, power extender kit or power connector. An accessory sold separately or promoted free in one channel is not box content. Check the exact package before ordering.	YesPower Extender Kit listed in the box. Source · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Remote sensors in this package Count of wireless room or temperature sensors supplied in the selected US package. Zero included does not establish that sensors are unsupported; some thermostats do not support any remote sensor at all.	1 sensorsOne SmartSensor in the box. Sources · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.ecobee: ecobee smart thermostat comparison tableChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Wireless connectivity Documented Wi-Fi bands and other radios in the thermostat. A 2.4 GHz-only radio needs that band enabled on your router. A listed radio does not by itself establish Thread or Matter support.	Dual-band Wi-Fi 802.11 b/g/n at 2.4 GHz and 802.11 a/n/ac at 5 GHz; Bluetooth 5.0; 915 MHz radio. Source · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Matter certified Whether the manufacturer documents Matter certification or Matter control. Matter control may still require the maker's app for setup. Matter is not the same as a native Alexa, Google or HomeKit integration.	Not verified We have not verified this value. It is not a confirmed no or zero. Check the original source or ask the manufacturer if it affects your choice. Neither Matter nor Thread is mentioned on the manufacturer page. Source · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Thread radio documented Whether the manufacturer explicitly documents Thread support. An 802.15.4 or sub-GHz radio listing is not a Thread claim. Unknown means no explicit statement was found.	Not verified We have not verified this value. It is not a confirmed no or zero. Check the original source or ask the manufacturer if it affects your choice. Neither Matter nor Thread is mentioned on the manufacturer page. Source · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Apple HomeKit or Apple Home named Whether the manufacturer names Apple HomeKit or Apple Home as a supported platform. Matter-only compatibility with Apple Home is not recorded as HomeKit support unless the manufacturer names Apple.	YesApple HomeKit, Amazon Alexa, Google Assistant, Samsung SmartThings and IFTTT are named. Siri on the thermostat needs a compatible Apple home hub. Sources · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.ecobee: ecobee smart thermostat comparison tableChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Display and control Documented screen type, size or resolution and the primary local control method. Screen size does not rank usability. Some thermostats are controlled by a side touch strip or ring rather than a touchscreen.	4 in. full-color LCD touchscreen, 540 x 540 pixels. Source · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Built-in humidity sensor Whether the thermostat itself documents a humidity sensor. Sensing humidity is separate from controlling a humidifier or dehumidifier, which depends on accessory support and wiring.	Yes Source · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Built-in air quality monitoring Whether the manufacturer documents an indoor air quality sensor in the thermostat. Air quality monitoring names a feature, not a measured accuracy. The sensed parameters may not be published.	YesBuilt-in indoor air quality monitor; the sensed parameters are not published on the page. Sources · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.ecobee: ecobee smart thermostat comparison tableChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Built-in occupancy or motion sensor Whether the thermostat documents a built-in occupancy, motion or radar sensor. Geofencing through a phone and remote sensors are different mechanisms from a sensor in the thermostat.	YesRadar occupancy and proximity sensors. Sources · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.ecobee: ecobee smart thermostat comparison tableChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
App, account and subscriptions The documented app required for setup and any optional or required subscriptions. Core heating and cooling control normally works without a paid plan; security or filter services are separate subscriptions.	ecobee app for setup and remote control. An ecobee Smart Security plan is required for security features such as smoke alarm detection and siren; filter home delivery needs a separate subscription. Source · 2026-10-21 ecobee: Smart Thermostat Premium product page and specificationsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Questions to check before buying	A published compatibility list is a manufacturer statement, not a tested installation guarantee; the manufacturer compatibility checker and the actual wiring decide. No model number is shown on the manufacturer page; the package is identified by the ecobee.com listing. Energy savings figures on the manufacturer pages are marketing claims and are not recorded as facts.

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