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Window AC BTU Chart
Use this window AC BTU chart to compare room square footage and cooling capacity.
Last updated: May 2026
Chart values
| 150 to 250 sq ft | 5,000 to 6,000 BTU |
|---|---|
| 250 to 350 sq ft | 7,000 to 8,000 BTU |
| 350 to 550 sq ft | 9,000 to 12,000 BTU |
| Sunny/open rooms | Round up carefully |