800.308.8057

8am–10pm CT, 7 days a week

0
800.308.8057
  • 8am–10pm CT, 7 days a week
  • How Many Thermostats Do I Need for Electric Floor Heating?

    How Many Thermostats Do I Need for Electric Floor Heating?

    The Simple Way to Know How Many Thermostats You Need

    When planning your floor heating project, the first thing to consider is the size of the heating zone. A heating zone is the area or space you want to warm up. For many projects, that means one room, but it can also be an open connected area, such as a kitchen and dining area with the same flooring, where you want the floor heating to turn on and off across the entire space.

    In most cases, you will have one thermostat for each heating zone. However, depending on the size of that space and the amount of heating product required, you may need additional thermostats. When that happens, it comes down to one key number: Total Amps.

    It’s All About the Amps

    Each floor heating thermostat can manage a maximum of 15 Amps. As you begin planning, start by measuring the space you want to heat. The space dimensions and layout determine the number of electric floor heating mats or length of the heating cable required. Once you know the quantity you plan to install, answering the question “How many thermostats do I need?” becomes simple:

    Add the Total Amps for each component.

    Examples

    If you are using multiple floor heating mats in one heating zone, add the Amps for each mat:

    Mat 1: 0.8 Amps
    Mat 2: 1.0 Amps
    Mat 3: 1.2 Amps

    Total: 3.0 Amps

    Since 3.0 Amps is under 15.0 Amps, that heating zone is within the capacity of one thermostat.

    Now let’s look at a basement divided into two heating zones.

    Basement Zone 1:
    Mat 1: 4.5 Amps
    Mat 2: 5.0 Amps
    Mat 3: 4.0 Amps

    Zone 1 Total: 13.5 Amps

    Basement Zone 2:
    Mat 1: 3.5 Amps
    Mat 2: 4.0 Amps
    Mat 3: 3.0 Amps

    Zone 2 Total: 10.5 Amps

    Each heating zone is under 15.0 Amps, but because the basement is being controlled as two separate heating zones, each zone uses its own thermostat. In this example, the basement requires two thermostats.

    The exact same process applies to electric floor heating cables too.

    So, the simple rule is:

    For each floor heating zone, add the Amps. Stay at or below 15 Amps per thermostat.

    Where Can I Find the Amps Information?

    You do not need to guess or do complicated electrical math. ThermoSoft conveniently lists the Amps amount for every floor heating mat and heating cable on our product pages so you can quickly check before ordering.

    Look for the product table on the collection page. Each floor heating mat size or heating cable length includes the Amps for that product. Simply add the Amps for the heating mats or cable lengths you plan to use in the same floor heating zone.


    Does Voltage Change the 15-Amp Rule?

    No. Voltage does not change the 15 Amp limit for one thermostat.

    One thermostat controls up to 15 Amps. The difference is that a 240V system can carry more (double) Total Watts than a 120V system while still staying under 15 Amps.

    For example:

    • 120V at 15 Amps equals 1,800 Watts.
    • 240V at 15 Amps equals 3,600 Watts.

    That means Voltage affects total Wattage capacity, but the thermostat rule stays the same:

    One thermostat, one floor heating zone, up to 15 Amps.

    This is why using the Amps listed on ThermoSoft product pages is the easiest method to combine total Amps needed. You do not need to calculate Watts or convert Voltage. Just add the listed Amps for the electric floor heating mats or heating cable lengths in that heating zone.


    Other Thermostat Considerations

    Sometimes, one room can have more than one floor heating zone. Other times, multiple connected areas can share one heating zone.

    The question to ask is:

    Do you want these floor heating areas controlled together or separately?

    More than one thermostat makes sense when different areas need separate control, such as:

    • A bathroom and hallway controlled separately
    • A side-by-side kitchen and living area with different heating schedules
    • A basement divided into different finished areas
    • Multiple rooms where each space needs its own temperature control

    Each area you want to warm and control separately gets its own thermostat calculation.

    Easy Thermostat Checklist

    Use this simple checklist as you plan:

    • Determine the number of heating zones. Each floor heating zone typically has its own thermostat (or set of thermostats).
    • Measure the dimensions of each heating zone.
    • Select the ThermoSoft floor heating product and quantity for that zone, such as ThermoTile Floor Heating Cable for tile and stone or WarmStep Floor Heating Mats for floating floor, nailed or glue-down wood floor.
    • Add the Total Amps for the electrically heated mats or floor heating cable lengths in that zone.
    • If the total is 15 Amps or less, one thermostat is required for that zone.
    • If the total is more than 15 Amps, the project will require multiple thermostats or separate heating zones.
    • If you have any questions, contact ThermoSoft. Our team of US experts will help you determine the right solution.

    Final Takeaway

    ThermoSoft strives to make it easy to plan your floor heating project by providing simple answers to common questions, such as “How many thermostats do I need?”

    But you do not need to figure this out alone. The U.S. Manufacturer ThermoSoft is here to help. If you have any questions or want to confirm your estimate before ordering, our U.S. floor heating experts are ready and willing to assist.

    Click here to send us your room details, flooring type, Voltage, and the ThermoSoft products you are considering. We will help make sure you get the right system for your home, including the correct number of thermostats.


     

    Need help with a project?

    Tell us about your project and let our experts help you. Our team of Radiant Experts is ready to help! We can help find the right radiant heat product for any project from indoors to the outdoors. Just tell us a little about yourself and your project to get started.

    Contact an Expert 1-800-308-8057
    Cart

    Your cart is currently empty.

    Start Shopping
    CALL US TODAY!