A mini split air conditioner, also called a ductless AC, is a two-part system that uses an outdoor compressor and one or more indoor air-handling units to cool (and often heat) specific rooms. Unlike central AC, mini splits don’t require ductwork, making them highly efficient and flexible for targeted comfort. They’re available in single-zone and multi-zone setups, with wall, ceiling, and floor-mounted options.
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Use this BTU chart to size your ductless mini split system. Proper sizing ensures efficient cooling and dehumidification without short cycling.
| Room Size (sq ft) | Recommended BTU Capacity | Typical Usage |
|---|---|---|
| <150 | 6,000 BTU | Small bedroom, office |
| 150–250 | 9,000 BTU | Bedroom, small living room |
| 250–400 | 12,000 BTU | Primary bedroom, office |
| 400–550 | 18,000 BTU | Large living room, open den |
| 550–800 | 24,000 BTU | Great room, basement |
| 800–1,200 | 30,000 BTU | Extra-large space |
| 1,200–1,500 | 36,000 BTU | Multi-room or small apartment |
Note: Add ~10% capacity for kitchens, west-facing sunny rooms, or high ceilings. Oversizing can reduce efficiency—choose the closest correct size or consider multi-zone systems for larger homes.
Stay cool and efficient with the latest mini split air conditioners. Use our BTU chart to size your system and shop trusted brands at ShopAppliances.com.
