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Mini split articles and buying guides

Comparisons written for homeowners doing their own install. Where the brands publish a number or a warranty term, the article links to the manufacturer's page so you can check it yourself.

3-zone DIY mini split heat pump: wall-mounted ductless indoor unit in a living room, one of three zones on a 27K–36K BTU multi zone system

3-Zone DIY Mini Split Heat Pump (27K–36K BTU): MRCOOL, Pioneer, Senville & Zone Air ComparedWhich 27K–36K BTU three-zone systems a homeowner can actually install without a vacuum pump, how the line sets differ, and how the four brands compare on flexibility, warranty and cost.Updated September 2026

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Mini split error code lookupPick the brand, type the code, get the fix. 48 brands. Mini split sizing calculatorBTUs from room size, climate and insulation. Free, no sign-up.