AC Academy
AC Academy
Sizing, install planning, and efficiency guides from our HVAC experts.
Latest guide
Why Is My DIY Mini Split Turning On and Off?
Why Is My DIY Mini Split Turning On and Off? Your DIY mini split runs, stops, then starts again a few minutes later. The room never quite settles. Humidity stays sticky. You wonder if something is...
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DIY Mini Split First Week: What’s Normal (Quiet + Cold Air) vs What Means Fix It
Just installed a DIY mini split? Here’s what to expect in the first week and the warning signs that mean recheck the install or call supp...
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What Size Mini Split Do You Need for a Garage or Workshop?
Choose a garage or workshop mini split using square footage, insulation, ceiling height, climate, door use, voltage, and real installatio...
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What Comes With a MRCOOL DIY Mini Split? A Complete Buying Checklist
See what normally comes with a MRCOOL DIY mini split, what is commonly sold separately, and what to check before placing your order.
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Can You Mix MRCOOL Wall Mounts and Ceiling Cassettes on One System?
Learn when MRCOOL DIY wall mounts and ceiling cassettes can share one multi-zone condenser, plus the compatibility and installation check...
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MRCOOL vs. Mitsubishi Mini Splits: Which Is Better for Your Home?
Compare MRCOOL DIY and Mitsubishi Electric mini splits by installation, cold-weather performance, indoor-unit choices, cost, service, and...
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How Long Do Mini Splits Last? Lifespan, Maintenance and Replacement Signs
Learn how long a mini split may last, what shortens equipment life, which maintenance matters, and how to decide whether to repair or rep...
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Do Mini Splits Need a Surge Protector? A Simple Buyer’s Guide
Learn whether your mini split needs surge protection, what a surge protector can and cannot do, and how to choose the right type for your...
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Will a Mini-Split Ceiling Cassette Fit? A Pre-Buy Checklist
Learn whether a mini-split ceiling cassette will fit your joists, ceiling cavity, drain route, line-set path, and service needs before yo...
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How to Measure Mini-Split Line-Set Length (Without Ordering the Wrong Size)
Learn how to measure the real line-set route, choose the next available length, and check refrigerant, fitting, and pipe-size compatibili...
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Daikin ENTRA vs OTERRA vs AURORA: Which Mini Split Should You Buy?
Compare Daikin ENTRA, OTERRA, and AURORA mini splits by climate, efficiency, voltage, warranty, installation needs, and overall value.
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Best Temperature for a Mini Split: Summer, Winter, Sleep and Away Settings
Find practical mini-split temperature settings for summer, winter, sleep and vacations, plus simple advice for humidity, fan speed and en...
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