Smart
Smart Thermostats
Wi-Fi and learning thermostats with their makers' wiring statements side by side, so you can rule out the ones that won't run your system.
A smart thermostat is a Wi-Fi thermostat that adjusts heating and cooling on its own, by schedule, learning or occupancy, and lets you control it from a phone. ENERGY STAR labels models whose savings show up in data from real homes: at least 8% less heating and 10% less cooling run time, with an average saving of about 8% of heating and cooling bills.
What decides whether one will work in your home is behind the old thermostat. Smart thermostats usually want a C wire for steady power; heat pumps need O/B support; two-stage systems need a thermostat that handles W2 or Y2. Each row here shows the maker's statement, or 'Not stated'.
Not sure what you have? The wiring checker reads your system from the terminals you tick.
What's on your wall now?
You don't have a C wire
Some models include an adapter, run on batteries or say they work without one on most systems; their makers say which.
You'd rather it learn than be programmed
Learning thermostats build a schedule from the changes you make.
Before you swap it
- Heat pump?. Check for heat pump support and auxiliary heat control. What a heat pump needs.
- Hot and cold rooms?. Room sensors change where the thermostat measures. Sensors or zoning?
smart thermostat compatibility grid
48 products
| Image | Product | Type | C-wire | Systems | Stages | Sensors | Works with | Price on listing |
|---|---|---|---|---|---|---|---|---|
 | Google Nest BH1252 Learning Thermostat Google Nest | Learning thermostat | Not stated | Not stated | Not stated | with 2 Sensors | Nest | Check current price |
 | Google Nest CE911542 Learning Thermostat Google Nest | Learning thermostat | electric, oil, forced air, heat pump, and radiant, and no C wire is required for installation in most homes | Not stated | Not stated | Not stated | Amazon Alexa, Android, Apple HomeKit, Google Assistant, iOS | Check current price |
 | Google Nest G5AJK GJQ8U Learning Thermostat Google Nest | Learning thermostat | Not stated | Not stated | Not stated | Not stated | Amazon Alexa | Check current price |
 | Google Nest T3007ES Learning Thermostat Google Nest | Learning thermostat | Not stated | Not stated | Not stated | Not stated | Amazon Alexa, Google Assistant, nest | Check current price |
 | Google Nest Thermostat 3rd Gen Learning Thermostat Google Nest | Learning thermostat | Not stated | Not stated | Not stated | Not stated | Google Assistant, Amazon Alexa, nest | Check current price |
 | Honeywell Home THX321WFS2001W Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | Amazon Alexa | Check current price |
 | Riseem STN701W-Blue Smart Thermostat Riseem | Smart Wi-Fi thermostat | Cool systems (Gas, Oil, or Electric) and Air Conditioning, C-Wire Required | Not stated | Single-Stage | Not stated | APP | Check current price |
 | meross MTS300 Smart Thermostat meross | Smart Wi-Fi thermostat | Some wiring configurations require a C wire (not included) | Not stated | Not stated | Not stated | Amazon Alexa, Android, Apple HomeKit, Google Assistant, SmartThings | Check current price |
 | Vine TJ550 Smart Thermostat Vine | Smart Wi-Fi thermostat | Besides, a common wire (C-wire) is required for all vine thermostats | Not stated | 2h/2c | Not stated | Amazon Alexa, Android, Google Assistant, iOS | Check current price |
 | Google Nest BH1254-US Smart Thermostat Google Nest | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | Amazon Alexa, Google Assistant, nest | Check current price |
 | Honeywell Home RTH2CWF Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | Push Button, Amazon Alexa, Google Assistant, Apple HomeKit | Check current price |
 | Vine TJ610E Smart Thermostat Vine | Smart Wi-Fi thermostat | A common wire (C-wire) is required for all vine thermostat | compatible with 90% of system(24V AC System): Conventional (2H/2C)-Gas, Oil, Electric, Boiler | 2h/2c | Not stated | Alexa,Google assistant | Check current price |
 | Google Nest T4000ES Smart Thermostat Google Nest | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | Amazon Alexa, Google Assistant, Insteon, Nexia, nest | Check current price |
 | Sensi ST25 Smart Thermostat Sensi | Smart Wi-Fi thermostat | COMMON WIRE REQUIREMENTS: Designed to work without a C-wire in most homes, but for some sys | Works with the HVAC equipment found in most homes | Not stated | Not stated | Amazon Alexa, Google Assistant, Hand Control, SmartThings | Check current price |
 | Google Nest T4002ES Smart Thermostat Google Nest | Smart Wi-Fi thermostat | This unit is designed to work even if your home has a C-wire, but you may have to install a new one | Not stated | Not stated | Not stated | Google Assistant, Nest | Check current price |
 | Levoit LTM-A401S-WUS Smart Thermostat Levoit | Smart Wi-Fi thermostat | This thermostat comes with a C-wire adapter and is compatible with Heating and Cooling Systems, Cooling Only System | Not stated | Not stated | Not stated | Amazon Alexa, Android, Google Assistant, iOS | Check current price |
 | Honeywell Home RCHT8610WF2006/W Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | C-Wire required | COMPATIBLE WITH: Forced air (gas, oil or electric), hot water and steam, and heat pumps with electric backup | Not stated | Not stated | Amazon Alexa, Apple HomeKit, Google Assistant | Check current price |
 | Honeywell Home RCHT8612WF Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | Amazon Alexa, Apple HomeKit, SmartThings, Vera | Check current price |
 | Google Nest GA01334-CA Smart Thermostat Google Nest | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | Amazon Alexa, Android, Google Assistant, iOS, nest | Check current price |
 | Sensi ST55 Smart Thermostat Sensi | Smart Wi-Fi thermostat | Common wire (c-wire) is not required in most applications | Works with HVAC equipment found in most homes | Not stated | Not stated | Amazon Alexa, Apple HomeKit, Google Assistant, SmartThings, Vera | Check current price |
 | Honeywell Home RTH6580WF Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | C-Wire required | COMPATIBLE WITH: Forced air (gas, oil or electric), hot water and steam, and heat pumps with electric backup | Not stated | Not stated | Amazon Alexa, Google Assistant, Vera | Check current price |
 | Vine TJ-560-3 Smart Thermostat Vine | Smart Wi-Fi thermostat | A common wire (C-wire) is required for all vine thermostats | compatible with 90% of 24V AC systems, including Conventional 2H/2C(Gas, Oil, Electric, Boiler) | 2h/2c | Not stated | Android, iOS, Amazon Alexa, Google Assistant | Check current price |
 | Sensi ST75 Smart Thermostat Sensi | Smart Wi-Fi thermostat | Common wire (c-wire) is required | Works with the HVAC equipment found in most homes | Not stated | Not stated | Amazon Alexa, Apple HomeKit, Google Assistant, SmartThings, Vera | Check current price |
 | Sensi 1F87U-42WF Smart Thermostat Sensi | Smart Wi-Fi thermostat | Works with the HVAC equipment found in most homes - a c-wire is required for heat-only, cool-only and heat pump systems | Not stated | Not stated | Not stated | Amazon Alexa, Apple HomeKit, Google Assistant, SmartThings, Vera | Check current price |
 | Vine TJ-919T Smart Thermostat Vine | Smart Wi-Fi thermostat | /Voice Control, Compatible with Alexa and Google Assistant, C-Wire Required, TJ-919T | compatible with 90% of system(24V AC System): Conventional (2H/2C)-Gas, Oil, Electric, Boiler | 2h/2c | Not stated | Amazon Alexa, Google Assistant | Check current price |
 | LUX TX500E Smart Thermostat LUX | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | Push Button | Check current price |
 | ecobee EB-STATE7-01 Smart Thermostat ecobee | Smart Wi-Fi thermostat | No C Wire, no problem | Not stated | 2h/1c | Not stated | Amazon Alexa, Android, Apple HomeKit, Google Assistant, iOS | Check current price |
 | Honeywell Home TH6220WF2006 Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | Not stated | Not stated | Up to 2 Heat/1 Cool | Not stated | Amazon Alexa, Apple HomeKit | Check current price |
 | Aqara W200 Smart Thermostat Aqara | Smart Wi-Fi thermostat | No C-wire | works with about 85% of HVAC systems, including furnaces, air conditioners, heat pumps, boilers, and PTAC units | Not stated | Not stated | Apple HomeKit | Check current price |
 | Honeywell Home TH6320ZW2003 Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | SmartThings, Vera | Check current price |
 | Honeywell Home RTH9585WF1004/W Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | C-Wire required | COMPATIBLE WITH: Forced air (gas, oil or electric), hot water and steam, and heat pumps with electric backup | Not stated | Not stated | Touch Screen, Voice | Check current price |
 | Honeywell Home RTH9600WF Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | c-wire required | COMPATIBLE WITH: Forced air (gas, oil or electric), hot water and steam, and heat pumps with electric backup | Not stated | Not stated | Amazon Alexa, Android, Google Assistant, IFTTT, iOS | Check current price |
 | Honeywell Home TH8321WF1001 Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | Not stated | Not stated | 3 Heat / 2 Cool | Not stated | Amazon Alexa | Check current price |
 | ecobee EB-STATE6L-01 Smart Thermostat ecobee | Smart Wi-Fi thermostat | Not stated | Compatible with 90% of HVAC systems: Use the Compatibility Checker on the ecobee support page to confirm | Not stated | Not stated | Amazon Alexa, Android, Apple HomeKit, Google Assistant, iOS | Check current price |
 | Bosch BCC100 Smart Thermostat Bosch | Smart Wi-Fi thermostat | C-WIRE REQUIRED: A C-wire (common wire) is required to power the unit | Not stated | Not stated | Not stated | Amazon Alexa, Vera | Check current price |
 | Sensi ST76 Smart Thermostat Sensi | Smart Wi-Fi thermostat | Common wire (c-wire) is required | Works with HVAC equipment found in most homes | Not stated | Not stated | Amazon Alexa, Google Assistant, Hand Control, SmartThings | Check current price |
 | Honeywell Home TH9320WF5003 Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | Touch | Check current price |
 | ecobee EB-STATe3L-01 Smart Thermostat ecobee | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | Amazon Alexa, Apple HomeKit, IFTTT, SmartThings, Vera | Check current price |
 | ecobee EB-STATE3LTVP2-01 Smart Thermostat ecobee | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | Android, iOS | Check current price |
 | Honeywell Home RTH8580WF Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | Unit requires C WIRE to work | Not stated | Not stated | Not stated | Android, Vera | Check current price |
 | Honeywell Home RET97E5D1005/U Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | Android, Vera | Check current price |
 | ecobee EB-STATE6-01 Smart Thermostat ecobee | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | Amazon Alexa, Android, Apple HomeKit, Google Assistant, iOS | Check current price |
 | Honeywell Home RTH9580WF1005/W1 Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | C-wire needed for proper installation | Not stated | Not stated | Not stated | Amazon Alexa, Android, Vera, iOS | Check current price |
 | Honeywell Home YTH6320R1001 Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | Push Button | Check current price |
 | Honeywell Home X8VMC9W/W Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | C-wire required: If your system does not already have one, a voucher to receive a Hone | Not stated | up to 3 heat/2 cool | Not stated | Touchscreen | Check current price |
 | Venstar T7900 Smart Thermostat Venstar | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | Amazon Alexa, Android, Vera, iOS | Check current price |
 | Resideo S900 Smart Thermostat Resideo | Smart Wi-Fi thermostat | Not stated | Works with dual fuel, fan-coil, PTAC, and radiant systems | 3H/2C heat pump | Not stated | Touchscreen | Check current price |
 | Honeywell Home TH8320WF1029 Smart Thermostat Honeywell Home | Smart Wi-Fi thermostat | Not stated | Not stated | Not stated | Not stated | Amazon Alexa, Vera | Check current price |
No products match that filter.
Figures are the makers' own, quoted with their conditions on each product page. Prices change; each product page links to the current price.