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Sizing & BTU Guides
How to size a mini split for your space — square footage, BTU math, ceiling height, sun exposure, and the multi-zone capacity rules that actually matter.
5 articles
Best Mini Split for a Garage: Sizing, Voltage & Top Picks
Garages have unique HVAC challenges — uninsulated walls, large doors that open and close, sometimes vehicles releasing heat. Here's how to pick a mini split that handles real garage conditions.
How to Size a Mini Split: BTU Calculator + Manual J Basics
Sizing a mini split wrong is the #1 reason homeowners regret their purchase. Here's the methodology pros use, the cheat sheet that gets you 90% there, and the rooms that need a sizing exception.
How to Size Your MrCool Mini Split: BTU Calculator
Get the right mini split size the first time. This guide explains BTU calculations, room factors, climate adjustments, and which MrCool bundle fits your space.
Best Mini Split for a Bedroom: 9K vs 12K BTU
Choosing between a 9,000 and 12,000 BTU mini split for your bedroom? We compare the MrCool DIY 9K and 12K to help you pick the right size for quiet, efficient comfort.
Best MrCool System for Every Room Size
From small bedrooms to open-concept great rooms, find the right MrCool mini split size for any space. Complete BTU sizing guide with real-world recommendations.