Mini-Split Sizing & Buying Guide

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 spaces 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 / zones Use System Builder →
GOOD TO KNOW

What can change your required capacity?

Square footage is the starting point. The conditions of the room can increase or decrease the heating and cooling load.

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Higher ceilings: more room volume generally increases the required capacity.

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Direct sunlight: strong afternoon sun and large windows can increase cooling load.

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Insulation: poorly insulated spaces gain and lose heat more quickly.

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Kitchens: cooking appliances add additional heat to the room.

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Cold-climate heating: heating demand may require different sizing than cooling alone.

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.

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