Mini Split Room Sizing Guide

                                                Mini Split Room Sizing Guide

                                                How to Properly Size Your Mini Split

                                                Chris, the eComfort Product Expert
                                                By 
                                                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 Split with Inverter TechnologyMini splits are extremely efficient thanks to their 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 ensure 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.

                                                 

                                                How to Size Your Mini-Split

                                                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.

                                                 
                                                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).

                                                 

                                                 

                                                Step 1. Basic Info
                                                Step 2. Room Info
                                                Step 3. Construction
                                                Step 4. Results
                                                Total Load Calculations
                                                Start Over
                                                Cooling Load:
                                                Heating Load:
                                                Basic Room & Home Information
                                                Room Size:
                                                Zip Code:
                                                Room Type:
                                                Building Age:
                                                Download As PDF
                                                Print
                                                * For more accurate load calculations, you can edit the detailed information below.
                                                Skip To Results
                                                Tell Us About Your Home
                                                Fill out all of the fields provided to calculate your heating and cooling loads. We'll use that information to help you find the right mini split system for your home.
                                                Select the approximate age range of your home. We will use this to make an estimate of the quality of insulation of your home.
                                                Because different types of rooms are used differently, they have different heating and cooling needs.
                                                Calculate Load Estimates
                                                Temperature Information
                                                High: 90°F | Low: 10°F
                                                Outdoor Design Temp. determined by ZIP Code.
                                                Next: To Wall Details
                                                Wall Details
                                                Select 'Yes' if this wall separates the space being conditioned from the outdoors or an unconditioned space like a garage. Otherwise, if this wall is adjacent to another conditioned space, select 'No'.
                                                Enter the width of the wall. If only a portion of the wall is "Exposed", enter this width.
                                                Select 'Yes' if this wall separates the space being conditioned from the outdoors or an unconditioned space like a garage. Otherwise, if this wall is adjacent to another conditioned space, select 'No'.
                                                Enter the width of the wall. If only a portion of the wall is "Exposed", enter this width.
                                                Select 'Yes' if this wall separates the space being conditioned from the outdoors or an unconditioned space like a garage. Otherwise, if this wall is adjacent to another conditioned space, select 'No'.
                                                Enter the width of the wall. If only a portion of the wall is "Exposed", enter this width.
                                                Select 'Yes' if this wall separates the space being conditioned from the outdoors or an unconditioned space like a garage. Otherwise, if this wall is adjacent to another conditioned space, select 'No'.
                                                Enter the width of the wall. If only a portion of the wall is "Exposed", enter this width.
                                                Window Details
                                                North
                                                We assume Windows are 3'x4'. If your windows are larger or smaller, please adjust accordingly.
                                                We assume French Doors are 3'x7'. Each half of a double door should be counted separately.
                                                We assume Sliding Doors are 6'x7'. If your doors are larger or smaller, please adjust accordingly.
                                                East
                                                We assume Windows are 3'x4'. If your windows are larger or smaller, please adjust accordingly.
                                                We assume French Doors are 3'x7'. Each half of a double door should be counted separately.
                                                We assume Sliding Doors are 6'x7'. If your doors are larger or smaller, please adjust accordingly.
                                                South
                                                We assume Windows are 3'x4'. If your windows are larger or smaller, please adjust accordingly.
                                                We assume French Doors are 3'x7'. Each half of a double door should be counted separately.
                                                We assume Sliding Doors are 6'x7'. If your doors are larger or smaller, please adjust accordingly.
                                                West
                                                We assume Windows are 3'x4'. If your windows are larger or smaller, please adjust accordingly.
                                                We assume French Doors are 3'x7'. Each half of a double door should be counted separately.
                                                We assume Sliding Doors are 6'x7'. If your doors are larger or smaller, please adjust accordingly.
                                                Garage Door Details
                                                Each single garage door should be counted as 1 and each double garage door should be counted as 2.
                                                Next: To Ceiling Details
                                                Ceiling Details
                                                Select 'Yes' if the ceiling separates your space from the outdoors, an attic, or any other unconditioned space. Otherwise, if there is another conditioned room above your space, select 'No'.
                                                Enter the height of your ceiling. If you have a sloped, vaulted, or any other type of non-flat ceiling, enter the approximate average ceiling height.
                                                Next: To Floor Details
                                                Floor Details
                                                Select 'Yes' if the floor separates your space from the outdoors, an unconditioned crawlspace or basment, or is a slab on grade. Otherwise, if your space is over a conditioned room, select 'No'.
                                                Continue to Construction
                                                Wall & Window Details
                                                Garage Door Details
                                                Ceiling Details
                                                Floor Details
                                                Previous
                                                Submit & View Results
                                                Basic Room & Home
                                                Room Type
                                                Room Size
                                                ZIP Code
                                                Building Age
                                                Temperature
                                                Edit
                                                Avg. Outdoor Temp. High
                                                °F
                                                Avg. Outdoor Temp. Low
                                                °F
                                                Desired Indoor Cooling
                                                °F
                                                Desired Indoor Heating
                                                °F
                                                Walls
                                                Edit
                                                Wall Type
                                                Wall Insulation Quality
                                                North Wall Exposed Area
                                                East Wall Exposed Area
                                                South Wall Exposed Area
                                                West Wall Exposed Area
                                                Garage Door
                                                Edit
                                                # of Garage Doors
                                                Garage Door Insulation Quality
                                                Windows
                                                Edit
                                                Window Type
                                                North Wall
                                                East Wall
                                                South Wall
                                                West Wall
                                                Ceiling
                                                Edit
                                                Ceiling Exposed
                                                Ceiling Insulation Quality
                                                Ceiling Type
                                                Floor
                                                Edit
                                                Floor Exposed
                                                Floor Insulation Quality
                                                Floor Type
                                                Load Results (BTU/hr)
                                                Cooling load
                                                Wall
                                                Window
                                                Ceiling
                                                Floor
                                                Bay
                                                Infiltration
                                                Internal
                                                MRA ?
                                                Moisture Removal Allowance: It is typical for roughly 30% of your air conditioner's capacity to be used to reduce the humidity in your home.
                                                Total
                                                Heating load
                                                Wall
                                                Window
                                                Ceiling
                                                Floor
                                                Bay
                                                Infiltration
                                                Total
                                                Print
                                                Shop Mini Splits
                                                Disclaimer: This sizing tool, although based on a version of the ACCA Manual J, is for informational use and is intended only as a guide to assist with finding the best product for your needs. Since the calculations are based on the information provided, Power Equipment Direct, Inc. assumes no responsibility for inaccuracies resulting from improperly sized equipment. For a complete, professional sizing estimate, please call us at
                                                866-554-HEAT (4328).
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                                                Email My Results
                                                Enter your email address to receive your mini split sizing results directly in your inbox.
                                                Thank you! We will send your results shortly.
                                                +
                                                If you choose to start over, all of your entered information will be lost. Do you wish to continue?

                                                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 because they are sized for smaller spaces. Instead, they 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.

                                                 

                                                Get Custom Comfort

                                                Now that you know the basics of sizing, take the next step by building your own custom mini-split system.

                                                 

                                                arrow Next: Mini Split System Builder

                                                 

                                                 



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                                                Chris, the eComfort Product Expert
                                                By 
                                                Product Expert
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