AC Academy
AC Academy
Sizing, install planning, and efficiency guides from our HVAC experts.
Latest guide
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 checks to make first.
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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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How Much Electricity Does a Mini Split Use? A Simple Cost Guide
Learn how mini-split watts, run time, efficiency, weather and electric rates affect operating cost, with a simple formula and monthly cos...
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How Often Should You Clean a Mini Split? A Simple Maintenance Guide
Learn when to clean mini-split filters, check the drain and outdoor unit, and schedule professional service with this simple maintenance ...
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Best Mini Split Brands of 2026: Six Top Brands Compared
Compare Daikin, Mitsubishi, Senville, Pioneer, MRCOOL and Perfect Aire mini splits by installation type, cold-weather performance, produc...
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Do Mini Splits Bring In Fresh Air? Ventilation and Filtration Explained
Learn why most ductless mini splits recirculate indoor air, what their filters actually do, and when a home needs exhaust ventilation, an...
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