8 Best Millivolt Thermostat

    Millivolt Thermostat

    You may be wondering what a millivolt thermostat is and why it is used. Well, don’t worry about that anymore. We are here to help you. We will tell you about all the details and help you choose the best millivolt thermostat for yourself. 

    First of all, let’s see why we would need a millivolt thermostat.

    What is a millivolt heating system?

    Millivolt heating systems are not used that commonly. However, when they are used, they are primarily found in floor heaters and wall heaters. 

    These types of heating systems thus require a particular type of thermostat. It is known as a millivolt thermostat.

    What is a millivolt thermostat?

    Millivolt thermostat is a type of thermostat that uses very low voltage (usually 750 Mv or 0.75 V). They are not connected to your household wiring system.

    They have a unique thermocouple device that produces direct current (DC) electricity for them. They are primarily used with gravity wall heaters, direct-vent or top-vent wall furnaces, and mobile home direct-vent heaters.

    There are multiple options of millivolt thermostats available. For example, programmable thermostats, non-programmable thermostats, or Wi-Fi millivolt thermostats. Now let’s check the best millivolt thermostat you can have. Shall we?

    1. Lux Products GEO-WH Wi-Fi Thermostat

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    This thermostat is one of the best options available for you. GEO-WH is compatible with voice assistants like Amazon Alexa, Google Assistant, and others. It can be voice-controlled over Wi-Fi.

    This LUX product is straightforward to install and operate as well. The main advantage of using GEO-WH is its geofencing feature.

    This feature lets you help in saving with its “back” and “away” options. So, it can be controlled from anywhere at any time through its app. 

    Moreover, if you install this thermostat with a C wire, then it will become compatible with Alexa-enabled devices as well.

    • Easy to install
    • Geofencing feature
    • Large digital display
    • Cost saving
    • Sometimes becomes unstable when there is a new upgrade of the app


    2. Orbit 83521 Programmable Thermostat

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    This orbit millivolt thermostat has a beautiful design. Its modern shape adjusts well with the décor of your home. Besides the design, it comes with some useful features as well. 

    Orbit 83521 is a 7-day programmable. You can adjust the different settings according to your comfort each day. It doesn’t lose programmed data whenever its battery has to be changed. 

    It also has a large display screen which makes it easy to read all the numbers. It also has 1-degree accurate temperature readings.

    It is compatible with gas, oil, electric furnace, or millivolt systems. Although a voice assistant can not control it, it is still an excellent option for your home.

    • Easy to use
    • Affordable
    • Easy to install
    • Saves up to 33% of energy cost
    • Does not include geofencing feature

    3. Emerson 1E78-140 Non-Programmable Thermostat

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    Emerson 1E78-140 is a simple millivolt thermostat. You can easily afford this thermostat. It has a digital display with a backlight.

    The backlight makes it easier to read the thermostat. 

    Its size is not that big so that it can be installed anywhere. This also comes with the precision control of 1-degree. 

    This thermostat is compatible with both millivolt systems and baseboard heaters. Plus, it is very easy to install. You can install this thermostat in just 5 minutes!

    • Lightweight
    • Simple installation
    • Accuracy of 1-degree F
    • Non-programmable
    • No time indicator

    4. Honeywell Home RTH2300B1038 Programmable Thermostat

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    This Honeywell millivolt thermostat is a 5-2-day programmable thermostat. This means you can adjust different settings for the weekdays and weekends. 

    It has a battery change indicator so you would know when the battery has to be changed. This thermostat does not erase its data whenever there is a power outage. 

    It is a millivolt thermostat. It can also be used with central gas, oil, or electric furnace and AC. It also does not include mercury which can be best for you. 

    • Easy to install
    • Low price
    • Compatible with most HVAC systems
    • Requires battery change often

    5. Saswell SAS900STK-2 5-2-day Programmable Thermostat

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    If you are looking for a millivolt thermostat for a gas fireplace, this is your best option. Saswell thermostat is a 5-2-day programmable thermostat.

    You can set the temperature separately for weekdays and weekends. Its programmable mode makes sure that the temperature reaches its required level at the appointed time.

    If you are not using the battery power source you must connect a C wire. All the details of connecting C wire are easily available, so you don’t have to worry about that.

    In case you are using a battery power source. There’s a battery change indicator as well. This millivolt thermostat also includes accurate temperature control of 1-degree along with a 12- or 24-hour clock.

    • Easy to install
    • Programmable
    • Reliable
    • Turns off automatically when it reaches the required temperature
    • Printed manual is in tiny font

    6. LUX TX9600TS Programmable Thermostat

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    Lux programmable thermostat comes with a large touch screen. It lets you control the thermostat easily. It is compatible with almost every system, which includes heating or cooling systems and millivolt systems. 

    Its touchpad lockout does not let any unauthorized person control it. Meanwhile, its features allow you to put it on hold whenever you are not home.

    All the details or information about this millivolt thermostat are written in the manual. So, you won’t have to search about it in different places. 

    • Password enabled device
    • 7-day programmable
    • Large display touchscreen
    • Compatible with almost all HVAC systems
    • Not compatible with voice assistant

    7. White-Rodgers 1F80-0224 Programmable Thermostat

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    White-Rodgers 1F80-0224 is a simple but effective thermostat. It has a 2-inch screen display with a backlight, which makes it easy to read. 

    This thermostat also retains the data even when the power is lost. It does not require batteries, so those are not included. 

    • 24-hours programmable
    • Easy to install & use
    • Slightly expensive than other millivolt thermostats

    8. Emerson programmable Thermostat

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    This is Emerson’s 7-day programmable thermostat. Emerson is one of the most reliable brands for thermostats. It includes a small digital display with a backlight. 

    This Emerson millivolt thermostat is simple to install and operate. With the help of its manual, you can adjust the settings very easily. 

    It is run with a battery and a C wire along with the amperage range of 0.05 – 1.5. after buying this thermostat, you don’t have to worry about losing data. It saves your data even there is a power outage.

    • 7-day programmable
    • Permanent program retention
    • Choice between Celsius or Fahrenheit display
    • Cannot be connected with Wi-Fi


    These are some of the best millivolt thermostat options available for you. There are programmable, non-programmable, or Wi-Fi-enabled millivolt thermostats.

    Some of these thermostats have a geofencing feature that lets you save the energy cost. You can control some of them via smartphone apps or voice control. Each has different features that can be helpful for us.

    Each of you has different requirements, budgets, and tastes. So, make your own choice and get your required millivolt thermostat.


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