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If you’re looking to voice control or remotely control your electric baseboard, ceiling, in-floor or fan heating system, then a smart line voltage thermostat is worth considering.

Not only can you integrate line voltage smart thermostats with other smart devices, you can save money by using eco modes and geofencing features. That way your heating system goes into hibernation when you are out of your home.

When it comes to the best line voltage smart thermostat, the Mysa Smart Thermostat is our number one recommendation while the Stelpro Ki Thermostat is our best Z-Wave pick!

Let’s get started.

What is a Line Voltage Thermostat?

Line voltage thermostats are also known as high voltage or inline thermostats and are used with electric powered heating systems. They are also commonly referred to as 120 volts or 240 volts thermostats, 2 wire or 4 wire thermostats or single-pole or double-pole thermostats.

Before we proceed, it’s important that you check if the line voltage thermostat will work with your heating system or not. A line voltage thermostat should work with the following types of heating systems.

  • Baseboard Heaters
  • Ceiling Heaters
  • In-Floor Heating
  • Forced Fan Heaters

If you have one of these heating systems, then chances are your line voltage thermostat will work for you.

What are the difference between Low Voltage and Line Voltage

One of the main differences between low voltage thermostats and line voltage thermostats is that the former utilizes direct line voltage as a means of powering the heater whereas the latter uses the burning of fuels for power.

Another major difference is that low voltage thermostats typically run on 24 volts whereas line voltage thermostats run on high voltage (120 or 240 volts).

Low voltage thermostats are mostly used for central heating systems while line voltage thermostats work well with electric baseboard heaters, ceiling heaters, in-floor heaters, and forced fan heaters.

Single Pole vs. Double Pole Thermostat

When it comes to line voltage thermostat, there are two varieties available in the market: Single Pole and Double Pole. 

A simple way to find the type of line voltage thermostat is to check the back panel of your existing thermostat. If there are two wires on the back, then it is a single-pole thermostat, and if there are 4 wires on the back, then it is a double pole thermostat.

At SmartHomePerfected we always advise readers not to undertake any work they are not competent in performing and if in any doubt, it is best to seek the assistance of a professional.

Differences

Let’s discuss the type of thermostat you should buy for your home. The basic difference between a single pole thermostat and a double pole thermostat is that a single pole thermostat can’t be turned off. In contrast, the double pole thermostat comes with “off” functionality.

So, if you choose a single pole thermostat, then your heating system can’t be turned off through the thermostat, and it will run on a low setting. You can only turn it off by completely shutting down the heating system.

On the other hand, if you opt for a double pole thermostat, you will get the option to completely turn off your heating system.

In the end, it will likely depend on the wiring that you already have in place. If you want to turn off your heating system via thermostat, then the double pole is the best option. If you have no problem with turning off the heating system completely, then you can go with a single pole thermostat.

9.7
Top Pick
A flexible line voltage smart thermostat.

Mysa Smart Thermostat is a powerful line voltage thermostat that comes with a sleek design and a variety of integration options.

Top Features

  • Works well with Alexa, Google Assistant, and Apple HomeKit.

  • Minimalistic and sleek design.

  • Easy to set up.

Mysa Smart Thermostat is one of the best line voltage smart thermostats in the market. It comes with a modern and minimalist design, which makes it easy to blend into any environment.

On top of that, Mysa Smart Thermostat also works well with most smart home systems such as Alexa, Google Assistant, and Apple HomeKit.

A good thing about Mysa thermostat is that it comes with extensive online guides and video guides, which make it easier to set up the thermostat. So, if you have any experience of DIY, then you can install it in 15-20 minutes. However, if you are not experienced, then we would recommend taking the service of an electrician. 

Mysa Smart Thermostat also works with IFTTT, which means that you can easily program the various actions. It also uses your location to determine if anyone is in the home, and then it takes measures to save energy. Also, it comes with vacation mode, which you can enable when you go on vacation, and it will save energy. If you are looking for a capable line voltage thermostat, then you can’t go wrong with the Mysa Smart Thermostat.

What we liked
  • It comes with extensive guides, which make it easier to set up.
  • Price is quite reasonable.
  • Comes with a minimalistic look, which makes it easier to blend with most interiors.
  • It supports IFTTT, which you can use to define different actions and their trigger points.
  • Premium look and design.
What we didn't like
  • It won’t reconnect automatically after a power outage, so you will have to reset it manually.
9.5
Best Z-Wave Pick
A Z-Wave line voltage smart thermostat.

Stelpro Ki Smart Thermostat is a very efficient thermostat that works well with Z-Wave devices and hubs.

Top Features

  • It works flawlessly with Z-wave devices.

  • It comes with Eco mode, which saves a lot of energy.

  • Comes in single pole and double pole configurations.

Stelpro Ki Smart Thermostat is a very capable thermostat, and it comes with all the bells and whistles which you can expect from a good smart thermostat.

For starters, it’s compatible with Z-Wave devices, and you can easily link it to a Z-Wave enabled hub in your Smart Home. On top of that, it also comes with an Eco mode, which helps you save energy.

The best thing about Stelpro Ki Smart Thermostat is that if you connect it with smoke and carbon monoxide detectors. It can automatically turn on a connected HVAC system to extract harmful gases from your home, if detected. Similarly, you can also use it with your door and motion sensors, and it will adjust the temperature automatically.

The Stelpro Thermostat comes with a minimalistic design, which makes it easier to blend into any environment. You also get the option to pick a single pole or double thermostat version, which is a big plus. 

Overall, Stelpro Ki Smart Thermostat is a great smart thermostat, and if you have Z-wave products in your smart home, then it’s a great option for you.

What we liked
  • Compatibility with Z-wave based devices.
  • Eco Mode to save energy.
  • Variable heating with 4 different levels of power.
What we didn't like
  • Some customers complained about the quality of technical support.
9.4
Runner-up
A reliable line voltage smart thermostat.

nVent Nuheat Signature Thermostat is a programmable thermostat which comes with top of the line features and GFCI protection.

Top Features

  • It can be programmed according to a 7-day schedule.

  • GFCI protection protects against the risk of electrocution.

  • Comes with a built-in display to show all important information.

nVent Nuheat Signature Thermostat is a premium smart thermostat that comes with some great features. The main highlight of this thermostat is that it comes with Class A GFCI (Ground Fault Circuit Interrupter) protection. This feature comes into force when it detects current leakage, and it protects users from the risk of electrocution.

Another great feature of nVent Nuheat Signature Thermostat is that it’s programmable, and you can configure the thermostat based on a 7-day schedule. 

On top of that, it’s also compatible with IFTTT, which allows you to integrate with other smart devices and set actions or triggers for different conditions. It’s also compatible with WiFi, and you can use the web portal or smartphone apps to control the thermostat.

What we liked
  • It integrates with Amazon Alexa, Google Assistant, and IFTTT.
  • It protects you from the risks of electrocution with GFCI protection.
What we didn't like
  • More expensive than competitors.
  • Some users complained about the web portal’s user interface.
  • It does not automatically reconnect to WiFi if there is a connection drop.
9.2
Best Zigbee Pick
A reliable line voltage thermostat.

Stelpro Maestro Controller Thermostat is a versatile thermostat that works with WiFi as well as Zigbee.

Top Features

  • It works well with Google Assistant and Amazon Alexa via IFTTT.

  • It allows you to control heat in up to 8 zones.

  • It can be connected via WiFi as well as Zigbee.

Stelpro Maestro Controller Thermostat comes with Zigbee and WiFi connectivity options, which means you can easily integrate it into your smart home. 

It also comes with support for IFTTT, which allows you to connect the thermostat with Google Assistant and Amazon Alexa. 

Stelpro Maestro Controller Thermostat also comes with an app that offers you many great features. You can use the app to set up different zones and manage your heating using the app. It also comes with a Geofencing feature which allows the thermostat to adjust the heating when you enter or leave your home. 

The app also provides extensive reports on energy consumption so that you know how much energy is being used, and you can use it to make informed decisions.

What we liked
  • Comes with a built-in display.
  • The geofencing feature can help you save a lot of energy.
  • It works with IFTTT, which you can use to automate many actions.
  • It can support up to 19 Stelpro Thermostats across your home.
What we didn't like
  • Some users have complained that the thermostat can give false ambient temperature readings in certain conditions.
8.8
An integratable line voltage smart thermostat.

Sinope Smart Thermostat is an affordable line voltage thermostat that works well with Amazon Alexa.

Top Features

  • It comes with a Geofencing feature that adjusts the temperature based on your presence.

  • It works well with Amazon Alexa, Google Home, Neviweb, SmartThings, and Hubitat.

  • It comes with a built-in display.

Sinope Smart Thermostat (TH1123ZB) is one of the best high voltage thermostats in the market, and it works on 240 Volts.

The thermostat comes with great compatibility, and it works well with Amazon Alexa, Google Home, Samsung SmartThings, and Hubitat. However, it requires the Sinope GT130 Hub for integrating, which can be bought separately.

The thermostat comes with a small built-in display where you can see details such as temperature and time.

You can also install the Neviweb app, which unlocks some additional features which you can use. You can use the app to set actions according to a schedule. Similarly, you can also enable the geofencing option and set an array of actions to trigger when you enter or leave home. 

The app also generates detailed energy reports, which will help you know about overall energy consumption, and you can take measures to control it.

What we liked
  • Easy to setup with step-by-step guides.
  • It’s compatible with popular digital assistants such as Google Assistant and Amazon Alexa.
  • It comes with an app that offers many useful features.
  • It provides real-time energy in the form of graphs.
What we didn't like
  • It requires a hub to function.
  • The display is quite small.
An accurate line voltage smart thermostat.

King Hoot is a programmable line voltage smart thermostat that comes with accurate temperature control.

Top Features

  • It comes with a built-in LCD display.

  • It features an electronic sensing feature for accurate temperature control.

  • It’s programmable, and you can program it for all 7-days with the app.

King Hoot Smart Thermostat (K902-B) is a premium line voltage smart, designed by King Electric, which has been in business for over 60 years.

The King Hoot Smart Thermostat allows you to set different zones in your home, and you can control heating in the zones directly from the app.

It also comes with accurate sensing technology, which claims to detect accurate temperature with a margin of ±1 degrees Fahrenheit. The device also features over-the-air (OTA) firmware updates so you can expect the thermostat to continually improve.

It is also a programmable thermostat, and allows you to set a heating schedule for up to 7 days. In this way, you won’t have to adjust it every single day. 

It also comes in both single and double pole configurations, and you can easily pick the one which suits your requirements.

If we look at issues, then the biggest problem with King Hoot Smart Thermostat is that it doesn’t come with native support for Amazon Alexa, Google Assistant, or integrating with other smart home devices.

What we liked
  • Comes with multi-zone support.
  • It’s an accurate thermostat and offers the accuracy of ±1 degree Fahrenheit.
  • Comes with over-the-air (OTA) software updates.
What we didn't like
  • Doesn’t work with Google Assistant, Amazon Alexa, or Apple HomeKit.
  • It’s expensive compared to other smart thermostats.
8.7
Best Budget Pick
An easy to install line voltage smart thermostat.

Stelpro ASMT402 Maestro is a very capable line voltage smart thermostat that offers great value for money.

Top Features

  • It comes with a built-in display.

  • It offers accurate ambient temperature control with a margin of ± 1 fahrenheit.

  • It’s compatible with Zigbee devices.

Stelpro ASMT402 Maestro is a very efficient line voltage smart thermostat that you can use to regulate the heating system in your home.

It’s mainly designed to be used with Maestro ASMC402 Controller thermostat, and when it is connected with the controller, it can save up to 25% of energy. You can also link it with any Zigbee compatible controller as well.

It’s the best option for you if you are planning on using multiple thermostats in your home. Then you can simply use the Maestro ASMC402 Controller thermostat as the main thermostat and link the Stelpro ASMT402 Maestro thermostat to it.

What we liked
  • It offers excellent value for money.
  • It can be connected to the Maestro ASMC402 Controller thermostat, and it can save up to 25% energy when connected.
  • It’s also fully compatible with Samsung SmartThings
What we didn't like
  • The built-in display is relatively small.
  • It offers additional features only when connected with the Maestro controller thermostat or a Zigbee hub.

Should I Buy a Line Voltage Smart Thermostats

Financial Savings

One of the main reasons why you should invest in a good smart thermostat is financial savings. A smart thermostat will allow you to automate the process, and you can automize different settings, which will result in saving a lot of energy, and hence you will save a lot of money.

Remote Control

Smart thermostats can also be controlled remotely, you can take action when away from your home. For example, if you are in your office, you can turn on the heating remotely, and by the time you reach home, you will have a cozy environment where you can relax.

Voice Control

Smart thermostats also work well with major voice assistants such as Google Assistant and Amazon Alexa. You can use different voice commands to control thermostats.

Smart Integration

If you have a smart home, then you can integrate smart thermostats with other products to automate it. For example, you can integrate a thermostat with motion sensors, and you can set different actions such as when you enter the home, the thermostat will turn on heating.

Granular Settings per Zone

Smart thermostats also allow you to set different zones in your home, and you can configure settings for each zone. For example, you can set a different zone for your bedroom, and specify a custom temperature for that room. Similarly, you can set the custom temperature and settings for the living room and so on.

Common Questions Relating to Line Voltage Smart Thermostats

Can a Line Voltage Thermostat control my air conditioning?

No, a line voltage thermostat cannot control air conditioning. You will need a specific low voltage thermostat for controlling your air conditioning unit.

Can I use the Nest thermostat to control my baseboard heater?

The Nest thermostat is a low voltage thermostat, so you cannot use it to control your baseboard heater. Nest thermostats usually work on systems that use 36 volts while the Baseboard heaters usually work on 120/240 volt. So, you will need to get a line voltage thermostat to control your baseboard heater.

The Verdict

Line Voltage Thermostats are useful devices that can not only save a lot of energy but also make it easier for you to control the heating system.

When it comes to the best line voltage smart thermostat, Mysa smart thermostat is our number one recommendation because of its great features. The Stelpro Ki Thermostat is also a great option, but it comes with limited features. 

Now you tell us which thermostats look promising to you? Let us know your answer in the comment section below.

9.7
Top Pick
A flexible line voltage smart thermostat.

Mysa Smart Thermostat is a powerful line voltage thermostat that comes with a sleek design and a variety of integration options.

Top Features

  • Works well with Alexa, Google Assistant, and Apple HomeKit.

  • Minimalistic and sleek design.

  • Easy to set up.

Sources

www.homelectrical.com

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1 Comment

  • Avatar
    Wayne M
    Posted September 16, 2020 at 1:45 pm

    You say: “So, if you choose a single pole thermostat, then your heating system can’t be turned off through the thermostat, and it will run on a low setting. You can only turn it off by completely shutting down the heating system.”

    A single pole thermostat does not completely disconnect the heater, but it does turn it off. It does not run on a low setting.

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