What Size MRCOOL Mini Split Do I Need? (Full Guide)

Choosing the right size mini split is the most important decision you’ll make.

Too small? It won’t keep up.
Too big? It cycles inefficiently.

Quick Size Guide:

• 9K → up to 400 sq ft
• 12K → up to 550 sq ft
• 18K → up to 800 sq ft
• 24K → up to 1,050 sq ft
  
• 
  
  
  
  

Factors That Matter:

• Insulation
• Ceiling height
• Sun exposure
• Room layout

👉 When in doubt, slightly oversizing is better than undersizing.