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Sizing

Straight answers before you buy: which MRCOOL line fits, what size each room needs, how multi-zone works, and what the install really takes and costs.

Mini Split BTU Explained: Capacity, Tons and Why Bigger Isn't Better Sizing · 6 min read Mini Split BTU Explained: Capacity, Tons and Why Bigger Isn't Better What the BTU number on a mini split measures, how it relates to tons and watts, and why a unit that's too... MRCOOL DIY 18K BTU Mini Split: ENERGY STAR Options, Room Size and 230V Sizing · 5 min read MRCOOL DIY 18K BTU Mini Split: ENERGY STAR Options, Room Size and 230V The 18K across DIY Select, DIY EasyPro and DIY 5th Gen: the 600 to 800 sq ft rooms it fits, the ENERGY... MRCOOL DIY 12K BTU Mini Split: ENERGY STAR, Room Size and Running Cost Sizing · 6 min read MRCOOL DIY 12K BTU Mini Split: ENERGY STAR, Room Size and Running Cost The 12K side by side across DIY Select, DIY EasyPro and DIY 5th Gen: what room it fits, why it runs on... How Quiet Is a MRCOOL DIY Mini Split? Decibels vs Other AC (2026) Sizing · 5 min read How Quiet Is a MRCOOL DIY Mini Split? Decibels vs Other AC (2026) What 18 dB(A) indoors and 54 to 61 dB(A) outdoors sound like, how a mini split compares to a window AC for... MRCOOL Mini Split Sizing: A Room-by-Room Guide to the Right BTU Sizing · 9 min read MRCOOL Mini Split Sizing: A Room-by-Room Guide to the Right BTU Square feet to BTU, then the adjustments for ceilings, sun, kitchens, insulation and climate. Six real rooms worked out, from a guest... MRCOOL DIY 24K BTU Mini Split Review (2026): Which Line to Buy Sizing · 6 min read MRCOOL DIY 24K BTU Mini Split Review (2026): Which Line to Buy Which 24K to buy for an open floor plan up to about 1,050 sq ft: DIY Select, DIY EasyPro or DIY 5th... MRCOOL 36K BTU Mini Split Review (2026): The Biggest DIY Single Zone Sizing · 5 min read MRCOOL 36K BTU Mini Split Review (2026): The Biggest DIY Single Zone The DIY 5th Gen 36K is the largest one-room system we sell. What it covers, what it costs, and when a multi-zone...