Single Zone Mini Split System Sizing Calculator
Sizing Guide Step Two:
Use the calculator to help you figure out what size BTU mini-split system you need for your single zone by selecting the square footage range that best fits your measured zone. You can also select the mini-split type you want to help narrow results to your direct needs.
Please enter your room sizes to narrow your results
Rule of Thumb
A good rule of thumb is to take the square footage from the zone you need to heat/cool, and to multiply by 25. That will give you a good idea of the BTUs that are needed to adequately heat or cool the zone.
Note that this is just a rule of thumb and different factors such as geographical location, climate, windows in zones, and more can change the BTUs needed.