9 Best Smart Thermostat No C Wire

Updated October 2025

Top Choice

1.

Emerson Sensi Wi-Fi Smart Thermostat for Smart Home, DIY, Works With Alexa, Energy

Emerson Thermostats

9.7

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2.

Emerson Sensi Touch Wi-Fi Smart Thermostat with Touchscreen Color Display, Works with Alexa

Emerson Thermostats

9.5

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3.

Nest Thermostat E

9.2

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lowest price

4.

Honeywell RCHT8612WF2005/W T5+ Wi-Fi Smart Thermostat w/ Power Adapter

9.0

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5.

Honeywell TH9320WF5003 Wi-Fi 9000 Color Touch Screen Programmable Thermostat, 3.5 x 4.5 Inch

8.5

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6.

Honeywell Home RTH9585WF1004 Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy

8.1

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7.

ecobee3 lite Smart Thermostat, 2nd Gen, Black

7.9

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8.

Google, T3008US, Nest Learning Thermostat, 3rd Gen, Smart Thermostat, Pro Version, Works With

7.5

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9.

Google, T3017US, Nest Learning Thermostat, 3rd Gen, Smart Thermostat, White, Works With Alexa

7.1

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