# How do I calculate the total wattage of my in-floor heating system?

Before you install Mysa it is important to know the wattage of the In-Floor heating system that you are planning to use Mysa with. Mysa has very specific limits on energy and won’t function properly if the wattage doesn’t meet the requirements. The following are two formulas that can be used to calculate the wattage of the heating system. Method 1 is for ceilings that are 8 ft tall, method 2 is for ceilings that are 9 ft or taller. Be sure you are looking at the correct formula, as this can affect the final number.

*Note- Area of the floor means the area of the floor that has the heating elements underneath.

## Method 1 - Ceilings that are 8 ft tall

For ceilings that are 8 ft tall, use the formula; area of floor x 10. For example, if you have a 20x20 room, the area is 400sq.ft. Take this number and multiply it by 10, in this case, the answer will be 4000W. Take a look at the article In-Floor energy requirements to see if Mysa is compatible with this system.

## Method 2 - Ceilings that are taller than 9 ft

For ceilings that are taller than 9ft, use the formula; area of floor x height of ceiling x 1.25. For example, if you had a 20x20 floor and 9 ft ceilings the formula would look like this; 400 sq. ft x 9 x 1.25. In this case, the answer is 4500W. Take a look at the article In-Floor energy requirements to see if Mysa is compatible with this system.