7 Best Line Voltage Smart Thermostats Reviews in 2022

Having a line voltage smart thermostat installed in your home is quite a convenience as you get full control of the indoor temperatures. In case you are thinking of installing such a system and making a smart home, we have a list of the best line voltage smart thermostat options that you can check out. But, before you pick one from our list, there are a few important things that you must not forget to check:

  • Controller Type: Thermostats play a major role in making your home smart and providing you control over your home’s heating system. Not all the thermostat options come with the same controller types. While most thermostat options come with smartphone app support, some of the advanced thermostat options even support voice assistants as well.
  • Line Voltage: Depending on the line voltage used in your home, you need to pick a thermostat accordingly. You will find options that work for 120V, 208V, and also 240V. In fact, there are several thermostat options available in the market that come with support for all voltage lines.
  • Power Source: In the case of thermostats, you will find battery-powered options as well as hardwired ones. Using a hardwired one will be better as it won’t ask for battery replacements.

These few things will help you pick one good line voltage smart thermostat option from our list. But, in case you are a new customer and buying a line voltage smart thermostat for the first time, we have also included a Buying Guide later in the article that you can read beforehand. It’ll be a lot helpful for you to find the best thermostat for your home. For now, let’s just get to the list and start discussing the features of each line voltage smart thermostat one by one.

Best Line Voltage Smart Thermostats 2022

Best Line Voltage Smart Thermostats Controller Type Line Voltage Warranty Buy Now
Mysa Smart Thermostat IFTTT, Google Assistant, SmartThings, Amazon Alexa, HomeKit 120-240V 2 year long Check On Amazon
Stelpro Z-Wave Plus Thermostat SmartThings, Vera, HomeSeer, Nexia and Wink 240V 3 year long Check On Amazon
KING K902-B Hoot Smart Thermostat Hoot Smart Phone App 120/208/240V 2 year long Check On Amazon
Stelpro ASMC402 Smart Home Thermostat IFTTT, Vera, Google Assistant, Amazon Alexa 208/240V 3 year long Check On Amazon
Nuheat SIGNATURE Dual-Voltage Thermostat NEST, WiFi 120-240V 3 year long Check On Amazon
Honeywell TL8230A1003 Line Volt Thermostat 208/240V 1 year long Check On Amazon
Sinopé Smart Wi-Fi Thermostat Google Assistant, Amazon Alexa, HomeKit 240V 3 year long Check On Amazon

Best Line Voltage Smart Thermostats Reviews

1. Mysa Smart Thermostat

In case you are using electric baseboard heaters at your home, Mysa makes one of the best line voltage smart thermostats that you can check out.

Speaking of this thermostat option from Mysa, the best thing about this thermostat is its minimal design that goes with all kinds of interior designs and home decors. It’s quite advanced as you can control it using IFTTT and other smart assistants including Google Assistant, SmartThings, Amazon Alexa, HomeKit.

In fact, it’s designed to work with both 120V and 240V line voltage and requires just one neutral or second live wire. In fact, it also supports smartphone app control which makes controlling it quite convenient for the users. Moreover, the app offers good features like scheduling and geofencing so that you can program it to provide you comfort even before you reach home. In addition, it also helps you track your usage and manage electricity bills.

Best Features:

  • Compatible with IFTTT, Google Assistant, SmartThings, Amazon Alexa, HomeKit
  • Smartphone app support
  • Requires neutral or second live wire
  • Works with 120V and 240V
  • Comes with 2 year long warranty

Pros:

  • Provides energy insights
  • Comes with geofencing feature
  • Convenient Wi-Fi pairing

Cons:

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2. Stelpro Z-Wave Plus Thermostat

Stelpro Z-Wave Plus Thermostat

Next one this list, we have quite an affordable thermostat option from Stelpro which is one of the most popular and well-known brands in the market.

The Stelpro KI Z-wave thermostat is designed to work with 240V line voltage and can help you control any heater with 2-wire connection. In case you want a complete Z-wave experience, it pairs best with the Z-wave gateway controller, but unfortunately, it is sold separately. Well, there’s no need to worry as it easily pairs with your smartphone and also works with SmartThings, Vera, HomeSeer, Nexia, and Wink.

Moreover, you can even pair it with other things to trigger it such as by using door sensors, temperature sensors or motion sensors, etc. In addition, it is quite energy-efficient and comes with a dedicated Eco Mode that will definitely help you save some extra bucks on your electricity bill.

Best Features:

  • Compatible with SmartThings, Vera, HomeSeer, Nexia, and Wink
  • Smartphone app support
  • Works using 2-wire connection to heaters
  • Supports 240V line voltage
  • Comes with 3-year warranty

Pros:

  • Energy-efficient
  • Affordable pricing
  • Easy installation

Cons:

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3. KING K902-B Hoot Smart Thermostat

KING K902-B Hoot Smart Thermostat

In case you are looking for a premium line voltage smart thermostat option, King is one of the most trusted and well-known brands in this industry that offers a wide range of such devices.

This thermostat option from King is quite a good one and offers a highly convenient experience to the users as it comes with Hoot smartphone app support which is very easy to install and use. On top of it, the thermostat itself has a large touchscreen display that you can use to operate it. In fact, the thermostat pairs via Wi-Fi and is capable of automatically installing OTA updates.

The best part about this smart thermostat is that it allows you to program up to 4-6 time periods per day so that you can set different temperature settings for maximum flexibility. In fact, this thermostat is designed to work with 120, 208 and 240V and uses electronic temperature sensing to provide you with accurate control.

Best Features:

  • Features a large LCD touchscreen display
  • Hoot Smartphone app support
  • Program 4-6 time periods per day
  • Works with 120V, 208V, and 240V
  • Comes with 2 year long warranty

Pros:

  • Large backlit buttons
  • Receives OTA updates
  • Accurate temperature sensing

Cons:

  • Does not work with smart assistants

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4. Stelpro ASMC402 Smart Home Thermostat

Stelpro ASMC402 Smart Home Thermostat

As we said earlier, Stelpro is quite a well-known brand in the market, it offers a wide range of smart thermostat options to choose from.

Speaking of the Stelpro ASMC402 Smart Home Wi-Fi Controller Thermostat, it’s one of the most high-end thermostat options offered by this brand. It is an all-in-one solution for your home as it can be used to control Line Voltage Electric Baseboards, Convectors, and Fan Heaters. Moreover, it’s pretty advanced as it comes with support for smart assistants like Alexa and Google Assistant through  IFTTT.

Moreover, it is compatible to add maestro connectivity to the devices at your home, so if you have multiple such thermostats at home, you can control them all at once using the maestro controller. On the other hand, you will find all the necessary controls on the smartphone app which is pretty easy to install and pair with the thermostat for use. In addition, it provides you with smart features like scheduling and geofencing that optimize energy usage and help you save on electricity bills.

Best Features:

  • Compatible with IFTTT, Google Assistant, Amazon Alexa
  • Smartphone app support
  • Requires neutral or second live wire
  • Works with 208V and 240V
  • Comes with 3 year long warranty

Pros:

  • Elegant design
  • Easy installation
  • Offers geofencing feature

Cons:

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5. Nuheat SIGNATURE Dual-Voltage Thermostat

Nuheat SIGNATURE

Coming up next, we have another premium brand choice that you can go with that is Nuheat as it’s one of the most trusted and high-selling brands in the market.

This thermostat option comes with a very stylish design and features a digital color LCD display as well. Apart from that, since it is Wi-Fi enabled, you can also take total control of it remotely via your smartphone or using their official web portal. In addition, this thermostat can also be paired with NEST for a better experience.

For better flexibility, this thermostat allows you to program and schedule the settings for 7 days, which will help you save a lot on the electricity bills too. On top of it, this SIGNATURE thermostat is designed to work with both 120V and 240V line voltage which is great. It even comes with a built-in GFCI (Ground Fault Circuit Interrupter) protection that takes care of any risk of electrocution caused by the current leakage.

Best Features:

  • Compatible with NEST
  • Smartphone app support
  • Features built-in GFCI (Ground Fault Circuit Interrupter) protection
  • Works with 120V and 240V
  • Comes with 3-year warranty

Pros:

  • Small and compact
  • Simple to operate
  • Installation is quite simple

Cons:

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6. Honeywell TL8230A1003 Line Volt Thermostat

Honeywell

For those who are looking for an affordable thermostat option, Honeywell is quite a good brand to go with as its products are reliable and provide good value for money.

This thermostat option comes with a 7-day programming feature that helps you schedule your usage and save on electricity in the easiest way possible. Moreover, this thermostat can work with both 208V and 240V so you can easily install it in your home as it barely takes a few minutes. Moreover, the thermostat offers accurate temperature control, thanks to the electronic temperature sensors built-in.

In fact, it’s quite good in terms of energy-saving as it has 15-minute heating cycles that will keep the temperatures maintained at all times. Moreover, this unit is totally soundproof so you won’t ever get disturbed by its operation. At the front, a large and clear display is provided that will showcase all the necessary information for the users.

Best Features:

  • Features a backlit LCD screen
  • Smartphone app support
  • Electronic temperature control
  • Works with 208V and 240V
  • Comes with 1-year warranty

Pros:

  • Affordable pricing
  • Easy to program
  • Energy-saving

Cons:

  • Does not support any voice assistants

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7. Sinopé Smart Wi-Fi Thermostat

Sinopé Smart Wi-Fi Thermostat

Last but not the least, we have yet another amazing thermostat option coming up from Sinopé which is quite popular for its stylish and value for money products.

Speaking of this thermostat, it’s compatible with all kinds of heating systems including baseboard heaters, convectors, fan-forced convectors, and radiant ceiling heating. Moreover, it is designed to work with 240V line voltage and supports both 2 wire and 4 wire connections too.

If we speak about its smart features, you can pair this thermostat with your smartphone and also control it with Neviweb, Apple HomeKit, Google Assistant, Amazon Alexa, SmartThings since it’s Wi-Fi enabled. On top of it, it’s loaded with advanced features like geofencing, scheduling up to 8 days, and also offers you reports about energy usage as well. Therefore, using this thermostat will allow you to monitor your usage and save electricity more easily.

Best Features:

  • Compatible with Neviweb, Apple HomeKit, Google Assistant, Amazon Alexa, SmartThings
  • Smartphone app support
  • Supports both 2 wire and 4 wire connections
  • Works with 240V
  • Comes with 3 year long warranty

Pros:

  • Easy pairing with smart assistants
  • Ideal for up to 4000W heaters
  • Modern design

Cons:

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Buying Guide for the Best Line Voltage Smart Thermostat

Installing a thermostat in your home can literally make a huge difference and can definitely provide you with a highly convenient experience. It’s simply a good investment to make and you should definitely go for it. However, since there are so many good options available in the market, it can be a difficult choice for most people to pick the best one.

However, if you know about the important things to check, finding the best one for yourself won’t seem like a tough task. That is why we have come up with this buying guide where we will talk about all the necessary things that every customer should check before buying a new thermostat.

1. Control Options

As you are looking forward to making your home smarter, you can not ignore the smart features that will be offered by the thermostat. On most of the thermostat options, one common feature that you will find is the smartphone app support.

As most line voltage smart thermostat options come with Wi-Fi connectivity, they can easily pair with your smartphone and can be controlled remotely from anywhere in your home. Apart from that, some of the advanced thermostat options do have support for additional devices such as smart voice assistants like Neviweb, Apple HomeKit, Google Assistant, Amazon Alexa, and SmartThings.

2. Line Voltage

One of the most important that you need to check is the line voltage that’s available in your home. You will find line voltage smart thermostat options which are ideal for 120V, 208V, and even 240V as well. That being said, you have to make sure that you buy the right one for your home. There are some options available in the market that support 120V/240V, 208V/240V, or even all of the line voltages.

3. Power Source

When you look out for a new thermostat, you will come across options that use batteries, while some options just need to be hardwired. With that said, if you are fine with replacing batteries, you can go with a battery-powered option. However, if we take a look from a long-term usage perspective, the hardwired ones are quite a better option to consider.

4. Connection Type

As you go through the thermostat options available in the market, there are some options that come with 2 wire connections, while some options require 4 wires. Depending on the type of heating system you are using, confirm it with your electrician whether you require a 4 wire thermostat or a 2 wire thermostat. In the market, there are some thermostat options available that support both 2 wire and 4 wire connections, so if you are confused, you can go with those options.

5. Warranty

Lastly, one of the most important things that people usually forget about is the warranty. Once you are done checking all the features and specifications of the thermostats, take an extra second to check for its warranty too. Most of the popular brands out there offer 2 or 3 years of warranty on thermostat devices, while some offer 1 year long warranty too. No matter how long the warranty is, you must not go with any thermostat option that doesn’t come with a warranty.

Conclusion

If you have read this article until here carefully, you must already know that we have mentioned all the best ling voltage smart thermostat options picked from the market in the list. Moreover, as we have discussed all their features, it will be easier for you to compare them and find the best option for yourself. In case you have any doubts in mind, you can also consider reading the buying guide as we have mentioned a lot of valuable information for the customers in that section. Still, if you are not able to pick the best thermostat option for yourself, here are some of our personal recommendations that might help:

In case you are looking for a thermostat with a neat design and smart features, the Mysa Smart Thermostat for Electric Baseboard Heaters is quite a good pick. It’s compatible with IFTTT, Google Assistant, SmartThings, Amazon Alexa, HomeKit, and offers smart features like geofencing and scheduling. Moreover, its installation is simple and it comes with a 2 year long warranty.

On the other hand, the Stelpro ASMC402 Smart Home Wi-Fi Controller Thermostat is yet another good option in case you want something premium. With dedicated smartphone app support and compatibility with smart voice assistants, it offers quite a convenient experience. Moreover, it can work with both 208V and 240V lines and can help you operate the heaters with your own personalized scheduled plans. In addition, it also comes with a 3 year long warranty.

In case you are looking for something affordable, the Honeywell TL8230A1003 Line Volt Thermostat will be the best pick for you. You can monitor energy usage and control this smart thermostat right from your smartphone. In addition, it offers accurate temperature control with 15 minute heating cycles and works with both 208V and 240V lines. On top of it, it also comes with a 1 year long warranty offered by the brand.

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