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Mini Split Sizing Guide

How to Properly Size Your Mini Split

Product Expert

If you're looking to upgrade your home's comfort, then getting the right sized mini split system is the most important step.

Mini splits are extremely efficient because they use inverter technology that enables your system to generate only the amount of heating or cooling needed to maintain the desired temperature. Even so, you'll want to be sure the system is properly sized for your home.

Although energy-efficient, if the system is too small, you'll find yourself wasting energy while your unit runs continuously, all the while failing to keep you comfortable in extreme conditions. This lack of performance will leave you on the hunt, yet again, for a better solution.

On the other hand, if the system is too large, you'll spend more on equipment and throw any energy savings out the window. Oversized equipment will also fail prematurely due to short cycling (turning on and off frequently).

The bottom line is this: Improperly sized equipment leads to decreased comfort, lower efficiency, increased service costs, and premature failure.

If you want a quick and easy sizing calculation, click on our sizing wizard below.

Mini Split Sizing Wizard>

Want A Custom-Tailored Mini Split System?
Mini splits are sized in BTUs (British Thermal Units), which measures the amount of heat needed to raise the temperature of one pound of water by one degree Fahrenheit.

Sizing ToolCall us today and our experienced engineers are happy to provide a complete, professional sizing for your space at no cost to you.

Because of the detailed work involved, these sizings take about 3-5 business days to complete. If you can't wait that long, or would just like a rough sizing estimate so you know where to start, you can click the button above to use our online Mini Split Sizing Wizard.

Our proprietary software will lead you through some brief, yet specific, questions about your space and provide the best sizing estimate you'll find from an online tool. If you're looking to buy a multi-zone system, use the tool once per zone to get sizing estimates for each indoor unit (outdoor unit sizing for multi-zone systems may require additional calculations beyond the tool's capability).

Why Are Some Systems Measured in Tons?
Often times, you'll see central air systems measured in tonnage. While this term sounds like a measurement of weight, it has nothing to do with weight at all. Tonnage is a term used in the HVAC field that describes how much heat the system can remove from the indoor air in one hour.

Mini-splits aren't measured in tonnage as well as central systems because they are sized to smaller spaces. Instead, mini splits are typically measured in BTUs (British Thermal Units). This is a much more universal system of measuring a condenser's ability to heat and cool an indoor area. You can convert tonnage to BTUs (1 Ton = 12,000 BTU) if you'd like to compare the two.

For a more dependable sizing estimate, contact us or use our Mini Split Sizing Guide above.

NEXT: Build Your Perfect Ductless Mini Split System

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