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How to Correctly Size a Mini Split System: BTU, Tonnage & Voltage Calculator

Sizing a mini split accurately prevents short-cycling, high humidity, and excessive power bills. Follow our professional HVAC sizing guide to match your room dimensions to BTU output.

BTU & Square Footage Quick Match

  • 9,000 BTU (0.75 Ton): 300 to 400 sq ft
  • 12,000 BTU (1.0 Ton): 400 to 550 sq ft
  • 18,000 BTU (1.5 Ton): 550 to 1,000 sq ft
  • 24,000 BTU (2.0 Ton): 1,000 to 1,500 sq ft

Use our interactive HVAC Load Calculator Tool or contact our technical sales desk at (517) 903-2146.