If your domicile's current HVAC system is without a C or common wire and you accept to replace the thermostat, you lot might wonder whether there are country-of-the-art smart thermostats that don't need a C wire. Or do y'all have to rewire your system to add together a C wire?

There are thermostats that don't demand a C wire to work. Many modern thermostats work with a C wire but are designed to also piece of work without the wire if needed. Mostly, they come with a power adapter that makes it possible. Most brands such as Nest, Ecobee, Wyze, and Honeywell nowadays offer thermostats that tin can piece of work without a C wire.

In this article, we list nine thermostats from seven well-known brands that tin work without a C wire and briefly requite the most important features of each.

ane. Nest E and Nest 3 Generation Thermostats

Nest is a earth-renowned visitor making thermostats. They currently offering two excellent thermostat models, namely Nest iii Generation (in short: Nest three) and Nest Due east. Nest 3 is a total-featured thermostat compatible with 95% of the HVAC systems in the US and  Nest Due east is a upkeep, trimmed-down version, compatible with nigh 85% of the HVAC systems.

Installation

C wire is not necessary

In near HVAC systems both thermostat models will piece of work without a C wire. Thus, you tin can use the Nest thermostats if your setup is currently without a C-wire.  Although, if there is a C wire already in identify in your system, yous just have to install the Nest thermostat and it volition work.

Utilize a power adapter

It is however recommended that if yous don't have a C wire in your current setup, you lot use a C wire adapter. An adapter will ensure that the thermostat will never run into power and unexpected turning-off issues.

Special features

These ii thermostats offer various features. Permit's look at two of the special features.

Self-learning feature

Both these Nest smart thermostats are "self-learning." This means they acquire your living habits and patterns in your domicile and so re-arrange the gear up schedules automatically when needed.  This characteristic gives high energy savings and the thermostat can pay for itself within 2 or 3 years of installation.

Wi-Fi and Voice options

The Nest thermostats offer Wi-Fi connectivity so that you can control them from anywhere via the Internet. You can also interface extra temperature sensors (room sensors) with them. Voice command and smart home integrations similar Apple Homekit, Google Home, and Amazon Alexa are enabled in these Nest thermostats.

2. Ecobee iii Lite and Ecobee 4 Thermostats

Ecobee has 2 fantabulous smart thermostat models available, namely the very pop Ecobee iv and the somewhat cheaper Ecobee 3 Calorie-free. Both models offering features similar built-in Amazon Alexa for voice control, geofencing, an extra room sensor, and Wi-Fi capability. Ecobee claims that y'all can save on average 23% of energy utilization every year. Within 2 to iii years the thermostat has paid itself.

Installation

C Wire Requirement

Although Ecobee thermostats work well with C wire connections, you can also use the Ecobee three Lite and Ecobee 4 if yous don't have a C-wire in your domicile electrical circuit.

Power Extender Kit (PEK)

They both come with a PEK (Power Extender Kit) that y'all tin use in homes without a C wire. With Ecobee all yous take to do is to connect the PEK to the command lath of your HVAC system. You can connect information technology to the furnace or estrus pump.

Compatibility

Ecobee thermostats are known for their compatibility features. Hubs that both thermostats can integrate with include Amazon Alexa, Apple HomeKit, Google Assistant, Samsung SmartThings, and Microsoft'southward Cortana.

Control

With these two Ecobee thermostats you have dissimilar options to command the HVAC organisation.

Both touchscreen and remote control

You tin control your Ecobee thermostat by using the thermostat's touchscreen. Merely y'all can also control the thermostat via Wi-Fi on your smartphone or tablet from anywhere in the earth.

Both models come with a mobile app which you can install on your smartphone to control the device from anywhere if your thermostat is continued to the internet via Wi-Fi

Voice control

The Ecobee four is equipped with built-in voice command features. Because Amazon's Alexa is built into Ecobee 4 you can talk to the device from anywhere inside your habitation. The thermostat comes with a high sensitivity microphone to capture your voice easily.

Self-Learning

The Ecobee four, is "self-learning" and can program itself after analyzing your family's living habits and patterns.

3. Mysa Thermostat

Mysa smart thermostat
Mysa Thermostat and App

Mysa is a line voltage thermostat exclusively designed for line voltage heating systems, including baseboard heaters, radiant ceiling heaters, fan-forced heaters, and convectors. The installation doesn't need a C-wire.

Mysa is the best Wi-Fi-enabled smart thermostat for line voltage systems. It tin can be controlled via the internet and has a convenient mobile app.

Features of the Mysa thermostat

The Mysa thermostat offers a wide variety of features. We'll expect at the most important ones:

Sensors

The thermostat has built-in humidity and temperature sensors. They predict the amount of humidity and temperature of your room and assistance the thermostat to maintain the room temperature.

When the temperature sensor measures the room temperature and finds it far from the ready value, the ability is reduced equally the room temperature approaches the ready value.

Its remote sensors sense the outside temperature when integrated with a smart hub like IFTTT through the Mysa app on your mobile.

Customized comfort and cocky-learning

Yous can control the Mysa thermostat on your mobile device from anywhere through the Mysa app. A total of 56 temperatures can be set for the whole calendar week.  Yous can set up the temperature and schedule according to your routine.

If you lot have a fixed routine at your home, the Mysa thermostat learns the routine and implements the temperature needs automatically.  And if you need to change the temperature in a particular zone in your habitation, you can apply the "Hold indefinitely" pick to override the set up temperature.

Compatibility

The Mysa thermostat is compatible with most of the line voltage heating systems in your home, including

  • an electric baseboard heater,
  • convectors (short bike),
  • fan-forced convectors (long-cycle),
  • radiant ceiling heating, and
  • self-contained hydronic baseboards.

4. Wyze Smart Wi-Fi thermostat

WYZE Smart WiFi Thermostat for Home with App Control Works with Alexa and Google Assistant, Black

Wyze has expanded its portfolio of affordable smart home devices to include smart thermostats. With their Wi-Fi-enabled Wyze Thermostat, y'all tin command your home'due south HVAC organization from your phone or with voice commands.

Installation with an adapter

The Wyze Thermostat does not run on battery power, and therefore a C wire, also known equally a "mutual" wire, will be ideal for power. Nonetheless, if y'all don't take a C wire you can still use the Wyze thermostat. Wyze provides a power adapter that you can utilise and when installed, your thermostat will work perfectly.

Important features

Command from the app

You tin can punch in the perfect temperature for your dwelling from anywhere in the world with your mobile device. This can salvage energy and coin, and foreclose frozen plumbing.

Works with vocalism administration

The Wyze thermostat is compatible with voice hubs. You lot can, for case, adjust the thermostat with your vocalization by asking Alexa. The thermostat is compatible with Alexa and Google Assistant.

7-Day scheduling

You can create daily schedules for every weekday and weekend.

Goose egg learning bend temperature control

Guests and family unit members tin adjust temperatures easily.

Easy DIY installation

You have a step-by-stride installation guide in the Wyze app.

Geofencing and movement detection

You can set the thermostat to become into either heating or cooling mode when the connected camera detects move. You tin can also utilise the geofencing feature to enable the home or abroad manner based on your mobile's location.

5. Honeywell Home T9 Wi-Fi Smart Thermostat

With the Honeywell T9 smart thermostat which works with smart room sensors, you can adjust the temperature from anywhere and stay comfortable in the rooms that matter. Y'all can place sensors in the rooms where you want to see and control the temperature and humidity. But the thermostat can also create an average temperature across the whole home.

Installation with an adapter

The T9 thermostat can piece of work with or without a C wire. If y'all don't take a C wire in your current HVAC organization, y'all can still use the T9. You only have to utilise the C- wire power adapter that comes with the thermostat. Thus, it's fully uniform with homes without C wires.

Important features

Let'south take a look at some of the important and handy features of the Honeywell home T9 Wi-Fi smart thermostat.

Comfort control

The T9 senses the temperatures in the places that matter most and focuses on the rooms y'all choose past setting a schedule. The sensors can also be set to respond automatically to your lifestyle.

Room Sensors

The T9 allows you to place smart room sensors effectually your domicile. This enables you to encounter each room'due south temperature and humidity. The sensors reach up to 200 feet to increment the quality of signal and data sent to the thermostat.

Easy command

Y'all can control the T9 past using the Honeywell Home app or through Amazon Alexa, Apple HomeKit, Google Assistant, and other hubs.

Compatibility

The T9 is compatible with forced air (gas, oil or electric), hot water and steam, and heat pumps with electric backup.

Monthly energy reports

You'll receive monthly energy reports regarding your heating and cooling trends. The thermostat volition offer tips on reducing energy use.

half dozen. GE Cync Smart Thermostat

The programmable Cync smart thermostat is Bluetooth and Wi-Fi enabled. Information technology is likewise compatible with Google Assistant and Alexa. The Cync smart thermostat displays a lot of information, but the Cync app is fifty-fifty more user-friendly to employ. The app shows amid many other things the electric current and ready temperatures, and also indicates whether your HVAC system is in cooling or heating way.

Install with an adapter

The Cync thermostat tin work with or without a C wire. Thus, you can employ the thermostat even if your dwelling house's HVAC is not equipped with a C wire.  Yous only have to install the C wire power adapter that comes with the thermostat. With the adapter, the thermostat will work perfectly.

Important features

Voice command

The Cync thermostat allows y'all to turn upwards the estrus or absurd it down in any room in your dwelling house with voice command from anywhere in your firm. You can actuate voice control with Amazon Alexa or Google Assistant because the thermostat is compatible with both.

Control with the Cync app

You can as well control the thermostat out-of-home with the Cync app. The command via the app is like shooting fish in a barrel and no hub or bridge is needed. You tin can change the temperature in your habitation remotely at someday from anywhere.

Compatibility and additional sensors

 The Cync thermostat is compatible with most heating and cooling systems: It is a thermostat that about can control whatever HVAC arrangement. The thermostat also supports an optional sensor that you lot tin can install in a second room. This sensor helps your HVAC system to eliminate hot and cold spots in your home. The Cync tin can even accommodate more than than 1 extra sensor.

With these extra sensors, the Cync smart thermostat averages the temperatures at the thermostat, and in each room that has a sensor, and the HVAC organisation comes close to delivering your target temperature throughout your entire habitation.

7. Lux Geo Thermostat

The Lux Geo thermostat has been i of the kickoff Wi-Fi thermostats that although it can piece of work with a C wire doesn't require organization power if a C wire is not available. Information technology is a vii-day programmable thermostat featuring a free iOS and Android app with geo-fencing. The thermostat can piece of work with any of its 3 ability options: 2 AA Lithium batteries, C wire, or micro USB.

Features

Compatibility

The Lux Geo thermostat is compatible with Amazon Alexa and Google Assistant. Information technology is also compatible with most conventional HVAC systems.

Geo app included

The Lux Geo thermostat comes with a related Android or iPhone app, including a geofencing feature.

Programming

The thermostat is piece of cake to programme from the thermostat itself or the app. Y'all tin can plan it for up to 7 days and y'all can set the temperature to either Celsius or Fahrenheit. Information technology also offers built-in geofencing. In other words, yous save more coin because the thermostat shuts down the devices if your mobile device moves out of the ready surround of the home.

Determination

If you have to install a new thermostat simply your HVAC system and home are not wired with a C wire, there are quite a few thermostats you can cull from. You volition likewise find that most modern state-of-the-art C wire thermostats come with a power adapter enabling you to install them without a C wire.