What Size Mini Split Do I Need?

What Size Mini Split Do I Need? A BTU Sizing Guide & Chart By Eli – Maryland-licensed HVAC contractor, EPA 608-certified, Updated August 2026 The quick answer: most rooms need roughly 20–25 BTU of mini split capacity per square foot, so a 500-square-foot room typically needs a 12,000 BTU unit and a 1,000-square-foot space needs […]