MINI SPLIT SIZING TOOL

Find the right system for your space

Enter a few details about your room and we'll estimate a practical starting capacity for your MRCOOL mini split system.

YOUR SPACE

Tell us about the room

Live estimate

Enter the approximate conditioned floor area.

sq. ft.
150 sq. ft. 1,500 sq. ft.
Ceiling height Higher ceilings increase room volume
Sun exposure Consider windows and direct afternoon sun
Insulation Choose the option closest to your space
Room type Some rooms naturally generate more heat
QUICK REFERENCE

Room size & BTU guide

Up to ~400 sq. ft. 9,000 BTU → ~400–550 sq. ft. 12,000 BTU → ~550–800 sq. ft. 18,000 BTU → ~800–1,050 sq. ft. 24,000 BTU → ~1,050–1,500 sq. ft. 36,000 BTU → Multiple rooms or zones Build a Multi-Zone System →
GOOD TO KNOW

What affects mini split sizing?

Square footage is only the starting point. Real-world conditions can raise or lower the heating and cooling load of a room.

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Ceiling height: taller rooms contain more air and may require additional capacity.

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Sun exposure: strong direct sunlight can increase cooling demand.

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Insulation: garages, older rooms, and poorly insulated areas may gain or lose heat faster.

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Kitchens: cooking appliances generate additional heat and can increase cooling requirements.

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Cold climates: heating requirements can differ from cooling requirements, especially when the mini split will be your primary heat source.

Build a Multi-Zone System → Ask Us About Sizing
NEED A SECOND OPINION?

Let us help confirm your system size

Send us your room dimensions, ceiling height, number of rooms, and location. Our team can help you narrow down the right MRCOOL configuration before you order.

Get Sizing Help →