To ensure that you are sizing the unit correctly, it is always best to contact your installer to ensure that the units you are planning on purchasing is what he or she recommends. That’s why I’ve created this comprehensive guide to help you choose the ideal mini-split size for your home. You would first need to select the region in which you live in, then you need to input the value of the energy you pay, this value is in cents/kWh. Please note that this is a general rule of thumb and different climates will require different sized units. Total BTUs needed Square footage of the room x Required BTUs per square foot Like most others, you probably glazed over that quick way to determine BTUs needed. The 'Energy Savings Calculator' tool shows you an approximation of how much money you can save when you compare two different efficiencies. Since these are very specific sizes we would typically recommend you to go with a 12,000 x 12,000 x 15,000 BTU system or more commonly referred to as a 12 x 12 x 15.Īll systems on our site already calculate the outdoor unit size so you do not need to worry about sizing that incorrectly. With our scenario above the system would need to have indoor units that meet or exceed 10,000 BTU’s for room 1, 9,375 BTUs for room 2, and 15,000 BTU’s for room 3. Below is an example of a 3 zone or 3 room system.Ģ0 feet multiplied by 20 feet gives a total square footage of 400 square feetĤ00 square feet multiplied by 25 gives us 10,000 BTU’s neededġ5 feet multiplied by 25 feet gives a total square footage of 375 square feetģ75 square feet multiplied by 25 gives us 9,375 BTU’s neededģ0 feet multiplied by 20 feet gives a total square footage of 600 square feetĦ00 square feet multiplied by 25 gives us 15,000 BTU’s needed This new number is the BTU’s needed for that zone. Once you have the square footage of each zone, multiply the square footage by 25. If you are unsure of how to answer any of the questions, click on the 'Help' button to the right. This would be the required procedure for sizing a Fujitsu mini-split system. However, we have a formula below to help you confirm that you are selecting the correct sized units if you want to get into the mathematical formula of sizing.įirst measure the room or each zone you plan to heat and cool. In the Output section, you will see your summer and winter BTU loads and the recommended Fujitsu systems for your application. We provide the easy calculator above to help you narrow down the results.
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