To determine what size mini split you need, you first calculate the square footage of the space you want to heat or cool by multiplying the length by the width in feet. Then, use BTUs (British Thermal Units) as the key measure of capacity, matching your room size to the appropriate mini split BTU rating. Here is a general guide based on room size to BTU recommendation:

• 150–400 sq ft: 9,000 BTUs (small bedroom, office)
• 400–550 sq ft: 12,000 BTUs (master bedroom, small living room)
• 550–1,000 sq ft: 18,000 BTUs (large living room, open studio)
• 1,000–1,250 sq ft: 24,000 BTUs (apartment, small home)
• 1,250–1,350 sq ft: 30,000 BTUs (large open floor plans)
• 1,350–1,500 sq ft: 36,000 BTUs (large homes)
• 1,500–2,000 sq ft: 48,000 BTUs (extra-large homes)
• 2,000–2,500+ sq ft: 60,000 BTUs (commercial, very large homes)

Adjustments may be necessary based on factors such as ceiling height (add 10-20% BTU if ceilings are above 8 feet), sun exposure, insulation quality, and room usage (kitchens need more BTUs). For example, high ceilings or poor insulation require more capacity, while a well-insulated space in a mild climate may require less. If you provide your room's square footage and any special conditions like high ceilings or poor insulation, I can help you estimate the right size more precisely. This sizing approach ensures efficient operation, comfort, and energy savings by matching the mini split size to your space heating/cooling needs. Oversizing or undersizing can cause inefficiency and discomfort. Let me know your room size or more details if you want a size recommendation tailored to your space.