Best Smart Thermostat Without C Wire – Today’s Price

1C Wire Adapter 24 Volt Transformer Compatible with Nest Honeywell ... Top Pick

C Wire Adapter 24 Volt Transformer Compatible with Nest Honeywell …

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2Emerson Sensi Wi-Fi Smart Thermostat for Smart Home, DIY, Works ... Best Quality

Emerson Sensi Wi-Fi Smart Thermostat for Smart Home, DIY, Works …

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3Honeywell Home C-Wire Adapter for Wi-Fi Thermostats THP9045A1098 Recommended

Honeywell Home C-Wire Adapter for Wi-Fi Thermostats THP9045A1098

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4Ecobee3 Lite SmartThermostat, Black

Ecobee3 Lite SmartThermostat, Black

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5Google Nest Power Connector - Nest Thermostat C Wire Adapter ...

Google Nest Power Connector – Nest Thermostat C Wire Adapter …

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6Google Nest Thermostat - Smart Thermostat for Home - Programmable ...

Google Nest Thermostat – Smart Thermostat for Home – Programmable …

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7Amazon Smart Thermostat – ENERGY STAR certified, DIY install, Works ...

Amazon Smart Thermostat – ENERGY STAR certified, DIY install, Works …

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8Honeywell Home RTH6580WF Wi-Fi 7-Day Programmable Thermostat with C-Wire Adapter

Honeywell Home RTH6580WF Wi-Fi 7-Day Programmable Thermostat with C-Wire Adapter

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9ecobee EB-STATe3L-01 3 Lite Thermostat, Wi-Fi, Works with Amazon Alexa

ecobee EB-STATe3L-01 3 Lite Thermostat, Wi-Fi, Works with Amazon Alexa

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1024 Volt Transformer, C Wire Adapter Thermostat, Compatible with Nest, ...

24 Volt Transformer, C Wire Adapter Thermostat, Compatible with Nest, …

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Review of Best Smart Thermostat Without C Wire

Top Pick

C Wire Adapter 24 Volt Transformer Compatible with Nest Honeywell ...

1. C Wire Adapter 24 Volt Transformer Compatible with Nest Honeywell …

  • Brand: Hotop
  • Manufacturer: HotopMERRY KING ENTERPRISES CO LTD
  • Color: White
  • Dimensions: Weight: 0.5952481074 Pounds `

Features

  • 【24V C wire power adapter for thermostat】: plugs into your standard 110v/ 120v outlet and converts to 24V, 500mA/AC
  • 【Designed for thermostats power supply】: widely applied for thermostats, powers up smart thermostats for Nest, Ecobee, Honeywell, Emerson Sensi, Hive, etc.; Charge for thermostats directly, without needing to remove your thermostats to charge up the battery, convenient and practical to solve the problem of “thermostats low battery”
  • 【UL certified】: UL certification passed, stable and durable 24V transformer for thermostats
  • 【Easy installation】: 2 pin non-polarity wires support easy and quick install, 23 ft cable is long enough to plug it into an electrical outlet inside or outside your house
  • 【Packing list】: 1 x C wire adapter, 1 bag (50 pieces) of cable clips; The brand mentioned above is just for demonstrating compatibility

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Best Quality

Emerson Sensi Wi-Fi Smart Thermostat for Smart Home, DIY, Works ...

2. Emerson Sensi Wi-Fi Smart Thermostat for Smart Home, DIY, Works …

  • Brand: Emerson Thermostats
  • Manufacturer: Emerson Thermostats
  • Dimensions: Height: 1.0 Inches Width: 5.88 Inches Length: 3.75 Inches Weight: 0.85 Pounds `

Features

  • PRIVACY PROTECTION*: Sensi won’t sell your personal information to third parties
  • SAVE ABOUT 23% ON HVAC ENERGY*: The ENERGY STAR-certified Sensi smart thermostat can help you save energy with features like flexible scheduling, remote access, and usage reports
  • EASY DIY INSTALLATION: Use the built-in level and step-by-step app instructions for a quick installation. Works with HVAC equipment found in most homes. Common wire (c-wire) is not required in most applications
  • SMART MAINTENANCE: Sensi can help monitor the performance and efficiency of your HVAC system by delivering valuable usage reports, alerts about your equipment, and maintenance reminders like filter replacement
  • SIMPLE CONFIGURATION: Looks and feels like a thermostat. Has buttons and fits the same space as a traditional thermostat so you don’t have to patch and paint your walls

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Recommended

Honeywell Home C-Wire Adapter for Wi-Fi Thermostats THP9045A1098

3. Honeywell Home C-Wire Adapter for Wi-Fi Thermostats THP9045A1098

  • Brand: Honeywell Home
  • Manufacturer: Resideo
  • Color: White
  • Dimensions: Height: 3.4375 Inches Width: 1.75 Inches Length: 5.625 Inches Weight: 0.28 Pounds `

Features

  • The C-Wire Power Adapter makes Honeywell Home smart thermostats compatible with most homes that don’t have a common wire..Product Type :Electronic Component. | Package Dimensions :10.0 ” L X10.0 ” W X10.0 ” H.Country Of Origin :United States
  • Quickly and easily power connected thermostats that require a c-wire.
  • Use for Wi-Fi, 24v Honeywell Home thermostats when a common wire is needed but not present.
  • Easy push terminals and an adhesive mount make installation quick and easy.
  • Simple adhesive mount allows you to attach the adapter to the outside of your furnace.

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Ecobee3 Lite SmartThermostat, Black

4. Ecobee3 Lite SmartThermostat, Black

  • Brand: ecobee
  • Manufacturer: Ecobee
  • Color: Black
  • Dimensions: Height: 4.05 Inches Width: 1.0 Inches Length: 4.05 Inches Weight: 1.0 Pounds `

Features

  • 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)
  • PLAYS WELL WITH OTHERS: ecobee3 lite works with your favorite smart home setups, including Apple HomeKit, Amazon Alexa, Google Assistant, Microsoft Cortana, Samsung SmartThings, Wink, and IFTTT
  • WORKS WITH ROOM SENSORS: Place them in the rooms that matter the most and have the temperature balanced throughout your whole home. Measuring both occupancy and temperature, sensors signal your ecobee Smart Thermostat to automatically switch to the right mode for comfort when you’re home or for savings when you’re not. 2-pack sold separately.
  • EASILY INSTALL YOURSELF: It only takes about 30 minutes, thanks to an easy to follow installation guide and an in-app step-by-step walkthrough. Everything you need comes in the box, including a Power Extender Kit for homes with no common wire (C-wire)

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Google Nest Power Connector - Nest Thermostat C Wire Adapter ...

5. Google Nest Power Connector – Nest Thermostat C Wire Adapter …

  • Brand: Google
  • Manufacturer: Google
  • Color: Snow
  • Dimensions: Height: 2.87 Inches Width: 2.12 Inches Length: 0.57 Inches

Features

  • Nest thermostats are designed to work without a C wire in most homes but for some systems, including heating-only, cooling-only, zone-controlled, and heat pump systems, you’ll need a Nest Power Connector or C wire.Product note: You can also check your system’s compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page
  • The Nest Power Connector is a simple affordable alternative to a C wire if your heating and cooling system requires one to power your Nest Thermostat
  • Costs less than hiring an electrician to install a new C wire through your walls
  • Installation is simple; the Nest Power Connector attaches to your furnace air handler, or zone controller and comes with simple instructions; no wiring or drilling required
  • The Nest Power Connector is only compatible with 24 VAC systems; it won’t work with millivolt or high voltage systems
  • The Nest Power Connector is the Nest thermostat C wire adaptor that’s designed specifically for Nest thermostats
  • This Google Product features the Google Seal for Online Marketplace when purchased from a seller other than Amazon.

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Google Nest Thermostat - Smart Thermostat for Home - Programmable ...

6. Google Nest Thermostat – Smart Thermostat for Home – Programmable …

  • Brand: Google
  • Manufacturer: Google
  • Color: Snow
  • Dimensions: Height: 1.0728346 Inches Width: 3.30709 Inches Length: 3.30709 Inches Weight: 0.61875 Pounds `

Features

  • ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Product note: You can also check your system’s compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page
  • The Nest Thermostat is designed to work without a C wire in most homes, but for some systems, including heating only, cooling only, zone controlled, and heat pump systems, you’ll need a C wire or other compatible power accessory
  • Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home; easily program an energy efficient schedule in the Google home app on your Android or iPhone
  • Remote control lets family members change the thermostat temperature from anywhere on a phone, laptop, or tablet[1]
  • Savings Finder looks for more ways your thermostat can help you save, and suggests tweaks to your schedule in the app; check with your energy provider to learn more about rebates and more ways to save on a Nest thermostat
  • Smart thermostat with HVAC monitoring, which looks out for your heating and cooling systems; sends an alert if something doesn’t seem right, along with helpful reminders to make maintenance easier[2]
  • It’s easy to install your thermostat, typically in 30 minutes or less, with everything you need included in the box; it’s compatible with 85% of heating and cooling systems
  • Control the temperature with your voice using smart home devices that work with Google Assistant or Alexa[3]
  • Nest Renew makes it simple to support clean energy right from home; it works with your Nest Thermostat[5] to help you automatically prioritize your usage[6] to times when energy is cleaner or less expensive
  • Please refer to the product description section below for all applicable legal disclaimers denoted by the bracketed numbers in the preceding bullet points (e.g., [1], [2], etc.)

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Amazon Smart Thermostat – ENERGY STAR certified, DIY install, Works ...

7. Amazon Smart Thermostat – ENERGY STAR certified, DIY install, Works …

  • Brand: Amazon
  • Manufacturer: Amazon
  • Color: WHITE
  • Dimensions: Height: 0.84 Inches Width: 3.56 Inches Length: 3.56 Inches Weight: 0.24125 Pounds `

Features

  • Smart upgrade – Amazon Smart Thermostat is an easy way to switch from a traditional thermostat and help reduce energy usage.
  • 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 comfort – Alexa can do the programming for you, updating the temperature to keep you comfortable.
  • 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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Honeywell Home RTH6580WF Wi-Fi 7-Day Programmable Thermostat with C-Wire Adapter

8. Honeywell Home RTH6580WF Wi-Fi 7-Day Programmable Thermostat with C-Wire Adapter

  • Brand: Honeywell Home
  • Color: White

Features

  • This bundle includes Honeywell Home RTH6580WF Wi-Fi 7-Day Programmable Thermostat and C-Wire Power Adapter.
  • EASY OPERATION AND INTUITIVE. Big, backlit digital display and easy controls make for a user-friendly experience.
  • SMART HOME INTEGRATION. The Wi-Fi 7-Day is compatible with voice assistant devices like Amazon Alexa, Google Assistant, Microsoft Cortana, and more.
  • SMART ALERTS help you worry less. Get air filter change reminders, temperature notifications, internet connection alerts, and more.
  • ENERGY STAR certified. Help save energy, track your heating and cooling with monthly energy reports and get personalized tips on reducing energy use.
  • COMPATIBLE WITH: Forced air (gas, oil or electric), hot water and steam, and heat pumps with electric backup. Does NOT work with electric baseboard heat (120-240V). C-Wire Required.

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ecobee EB-STATe3L-01 3 Lite Thermostat, Wi-Fi, Works with Amazon Alexa

9. ecobee EB-STATe3L-01 3 Lite Thermostat, Wi-Fi, Works with Amazon Alexa

  • Brand: ecobee
  • Manufacturer: ecobee
  • Color: Black
  • Dimensions: Height: 0.84 Inches Width: 4.05 Inches Length: 4.05 Inches Weight: 1.22 Pounds `

Features

  • Works with Alexa for voice control (Alexa device sold separately).
  • Your ecobee3 lite powers on through the C and Rc terminal. Be sure to insert your R/Rc/Rh wire in the Rc terminal of your ecobee3 lite thermostat.
  • Fast, easy installation – install your ecobee in 30 minutes or less. The step-by-step guide on our mobile app and free expert support make it easy.Smarter comfort – your ecobee understands your local weather, schedule and desired comfort settings, to ensure your home is at the right temperature at the right time
  • Personal energy reports – get free monthly reports on how much energy you’ve saved and tips on how you can save even more
  • Peace of mind – your ecobee monitors your heating and cooling systems and alerts you If it senses that something isn’t working properly. Refer userguide before use
  • ASIN B01K48T09Y has a newer model B06W56TBLN

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24 Volt Transformer, C Wire Adapter Thermostat, Compatible with Nest, ...

10. 24 Volt Transformer, C Wire Adapter Thermostat, Compatible with Nest, …

  • Brand: Garystat
  • Manufacturer: Garystat
  • Color: White
  • Dimensions: Height: 1.97 Inches Width: 2.28 Inches Length: 2.95 Inches

Features

  • 24 VOLT TRANSFORMER: Input 120V AC, Output 24V AC 300mA, with 7M (23ft) long cable.
  • SUPPORTED DEVICES: US power cable Powers your popular smart thermostats(Nest, Ecobee, Honeywell, Emerson Sensi, Hive, etc.) and doorbells (Ring, Nest Hello, Skybell, August) that require constant 24 volt power for operation.
  • SAFE AND EASY TO USE: UL certification. Assemble along the wall from your outlet to the doorbell and thermostat without the existing doorbell or wiring. Easy installation and 23 ft cable is long enough to plug it into an electrical outlet inside or outside your house.
  • PACKING LIST: 1 x 24 Volt C wire adapter, 1 bag (50 pieces) of cable clips. Please note that please check whether your model is suitable before purchase.
  • CUSTOMER SERVICE: Please contact us at once if any quality problem, We will resolve for you within 24 hours. Come with 180 Days money-back.

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