A 12,000 BTU air conditioner typically covers up to 399 sq ft (37.0 m²) under average conditions.
| Typical room | 399 sq ft |
| Shaded, well-insulated room | 684 sq ft |
| Sunny, poorly insulated room | 332 sq ft |
A room close to this size: 400 sq ft room guide.
Check if this fits your room →Computed with ACtopus's room-sizing formula — the same one the interactive calculator uses. Full breakdown: Cooling Sizing & BTU Load.