AC Academy
AC Academy
Sizing, install planning, and efficiency guides from our HVAC experts.
R-32 vs. R-454B Mini Splits: What Buyers Need to Know
An expert buyer’s guide to R-32 and R-454B mini splits, covering GWP, A2L safety, efficiency, service compatibility, existing R-410A syst...
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The Best DIY Mini Splits of 2026
The best true DIY mini splits of 2026, ranked by installation design, efficiency, climate performance, configuration flexibility and value.
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Will a Mini Split Heat Below Zero? A Cold-Climate Buying Guide
A practical guide to cold-climate mini splits: low-temperature capacity, 5°F ratings, balance point, COP, defrost, multi-zone sizing and ...
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115V vs. 230V Mini Splits: Breakers, Wiring, MCA and MOCP Explained
A buyer-focused guide to 115V versus 230V mini splits, including what MCA and MOCP mean, why BTU cannot determine breaker or wire size, a...
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Mini Split Condensate Drains Explained: Gravity, Pumps, Routing and Leaks
Plan a reliable mini split condensate drain with this guide to gravity routes, pumps, cassette lift limits, safe termination and leak pre...
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Mini Split Warranties Explained: Parts, Compressor and Labor Coverage
Learn what mini split warranties really cover, how registration and installer rules affect protection, and which repair costs may remain ...
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SEER2 Isn’t the Whole Story: How to Compare Mini Split Efficiency
Learn what SEER2, EER2, HSPF2, COP and cold-weather capacity really mean—and how to compare mini splits for your climate, comfort and bud...
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Wall Mount vs. Ceiling Cassette vs. Concealed Ducted Mini Splits
Compare wall-mounted heads, ceiling cassettes, and concealed ducted mini splits by installation, airflow, appearance, condensate drainage...
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Where Should You Install a Mini Split? Indoor and Outdoor Unit Placement Guide
Choose better mini split locations with this practical guide to indoor airflow, condensate drainage, line-set routing, outdoor clearances...
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Multi-Zone vs. Multiple Single-Zone Mini Splits: Which Setup Is Better?
One multi-zone condenser or several single-zone systems? Compare efficiency, redundancy, mode conflicts, line-set routing, electrical nee...
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What Is the New MRCOOL DIY Select Series and Why Should You Consider It?
Discover the new MRCOOL DIY Select mini-split series, its features, sizes and efficiency ratings, and how it compares with MRCOOL Easy Pro.
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Which Daikin Mini Split System is Right For You?
Which Daikin Mini Split System is Right For You? Choosing the right Daikin mini-split can definitely feel a bit overwhelming with all the...
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